Open Source AI Startup Jobs

Canonical is the company behind Ubuntu, the world's most widely used Linux distribution, and provides commercial support, cloud infrastructure tools, and enterprise open-source software services. It is privately held and self-funded by founder Mark Shuttleworth, with no external venture funding rounds, and continues to expand partnerships such as its 2025 collaboration with Broadcom.

Data infrastructure company providing high-quality training data for AI applications, recently partnered with Meta.

Company behind the open-source Grafana observability stack providing monitoring, logging, and tracing solutions, reaching $400M ARR as a fully remote company across 40+ countries.

Sonar (formerly SonarSource) builds SonarQube, a code quality and security analysis platform used by over 400,000 organizations to catch bugs, vulnerabilities, and technical debt across 30+ programming languages. The company offers cloud, server, and IDE products along with AI-era capabilities like AI Code Assurance and a remediation agent.

LangChain provides open-source frameworks and a managed platform (LangSmith, LangGraph) for building, observing, and deploying LLM-powered applications and agents. Its composable, modular components let developers integrate large language models into production workflows. Backed by Sequoia and IVP, LangChain is the leading developer framework for agentic AI.

Platform for deploying and scaling machine learning models in production.

Cloud platform for frontend teams building with Next.js and modern web frameworks, offering global edge infrastructure.

Kong Inc. provides an open-source API gateway, service mesh, and API management platform that lets developers connect, secure, and observe APIs and microservices across hybrid and multi-cloud environments. Its Konnect SaaS platform extends this into unified API lifecycle management and, more recently, connectivity for AI applications. Founded in 2009, Kong is a widely adopted developer-infrastructure company.

Delivers secure container images and tooling to protect open-source supply chains by default.

Fireworks AI runs an inference and fine-tuning platform for open-source generative AI models. Developers and enterprises use its API to serve models at low latency and high throughput. It was founded in 2022 by former Meta PyTorch and Google engineers.

Together AI provides an AI-native cloud platform for inference, fine-tuning, GPU clusters, and large-scale model training, helping AI engineers and researchers build and scale open-source and enterprise AI systems.

Agentic software creation platform enabling anyone to build applications using natural language with collaborative browser-based IDE

Supabase is an open-source Firebase alternative providing a full backend-as-a-service platform built on PostgreSQL, including database, auth, realtime subscriptions, edge functions, storage, and vector embeddings for developers.

Sentry is an application monitoring platform that helps developers diagnose, fix, and optimize the performance of their code. It provides error tracking, performance monitoring, and session replay across 100+ languages and frameworks.

Reflection AI is building frontier open intelligence accessible to all, developing open-weight AI models. Founded by former Google DeepMind researchers who co-created AlphaGo, raised $2B at an $8B valuation.

CodeRabbit provides AI-powered code review tooling that reviews pull requests, understands code context, suggests fixes, and helps engineering teams improve code quality and developer productivity. Its platform integrates with developer workflows and focuses on automated, context-aware reviews for teams adopting AI-assisted software development.

Dash0 is building the first AI-native observability platform powered by Agent0, an SRE AI agent that helps developers and operators quickly identify and fix application and infrastructure issues, processing millions of data points with OpenTelemetry-native architecture.

Fastest generative media platform for developers providing access to 1,000+ production-ready AI models for image, video, audio, and 3D generation through a unified API and serverless GPU infrastructure.

n8n is a fair-code workflow automation platform that enables technical teams to build complex automations with the flexibility of code and the speed of no-code, supporting 400+ integrations and self-hosted or cloud deployment.

Render provides cloud infrastructure for developers to deploy, run, and scale applications, databases, static sites, and AI workloads.

Application security and software supply chain security platform for modern DevSecOps.

Sanity builds a content operating system and structured content platform for developers and enterprise teams, with APIs, workflows, and AI-native content operations.

Prime Intellect is an AI infrastructure company that enables training and deploying frontier AI models across decentralized, globally distributed compute resources, commoditizing both compute and intelligence for researchers and organizations.

Roboflow provides end-to-end computer vision tools that enable developers and enterprises to build, deploy, and manage vision AI models. The platform supports the full lifecycle from data labeling and model training to inference deployment, serving over 250,000 developers and powering applications across industries including manufacturing, retail, and agriculture.

LiveKit is an open-source infrastructure platform for building realtime voice, video, and AI agent applications. Their platform powers products like OpenAI's ChatGPT Voice Mode, serving over 200,000 developers with billions of calls per year.

Developer-first software supply chain security platform that detects malicious packages, vulnerable dependencies, and risky open source behavior before code reaches production.

Network infrastructure management platform based on open-source NetBox for enterprise automation.

Upscale AI provides high-performance networking solutions for AI infrastructure. The company delivers open-standard connectivity for specialized computing, making AI more accessible through ready-to-use networking platforms designed for next-generation AI workloads.

Intelligent terminal for developers with AI-powered features, built with Rust to supercharge developer productivity through Agent Mode for seamless code generation, editing, and task management.

Menlo Research is a Physical AI research lab that began with Jan, an open-source, privacy-first AI assistant that has surpassed 6 million downloads, and is now building robots and models to solve real-world physical tasks. The ~25-person team is distributed across Singapore, Vietnam, and the US. It is community-built with no disclosed institutional funding rounds.

Managed workflow orchestration platform built by the original creators of Netflix Conductor for building reliable distributed applications and AI agents at scale.

Qdrant develops an open source vector database for semantic search and retrieval workloads in production AI systems.

River AI is a Palo Alto–based AI startup founded by former xAI co-founder Igor Babuschkin, building a full-stack platform for custom, open-weight model development. Its API lets developers fine-tune open models with reinforcement learning and LoRA, completing complex RL training runs in 15–20 minutes without dedicated infrastructure. The company positions itself as an alternative to prompt engineering against closed-source incumbents.

Metriport is an open-source healthcare data infrastructure company that aggregates, cleans, and unifies patient records from EHRs, HIEs, pharmacies, and labs into a single API and data model. Its platform gives clinicians and AI agents real-time patient context at the point of care, serving customers like Amazon One Medical and Color Health.

Filigran provides open-source cybersecurity solutions for threat intelligence management, adversarial exposure validation, and cyber risk management. Their XTM platform includes OpenCTI and OpenAEV.

Colossal Biosciences is a genetic engineering and de-extinction company using CRISPR technology to restore extinct species like the woolly mammoth and protect critically endangered ecosystems.

Nous Research is an open-source AI lab developing large language models and decentralized training infrastructure, including Hermes models and the Psyche network.

SigNoz is an open-source, OpenTelemetry-native observability platform that unifies metrics, traces, and logs in a single tool, positioned as a self-hostable alternative to Datadog. It offers both self-hosted and cloud options and is used by 700+ customers with 26,000+ GitHub stars. Founded in 2020 by Pranay Prateek and Ankit Nayan, the company was part of Y Combinator and operates primarily out of India with a US entity.

Open-source cloud infrastructure providing secure sandboxed environments for AI agents to run code and complete complex tasks, trusted by 88% of Fortune 100 companies.

Semgrep is a fast and lightweight static analysis tool and application security platform for finding security vulnerabilities in source code. It enables developer-first security workflows with high accuracy and minimal friction, serving companies like Figma, Dropbox, and Snowflake.

Convex is a backend-as-a-service platform for modern web applications, combining reactive databases, server functions, and auth-ready infrastructure.

Moderne provides a platform for mass-scale automated code refactoring and modernization, built on the open-source OpenRewrite project. The platform enables enterprises to automatically remediate technical debt, apply security fixes, and perform framework migrations at scale.

Morpho Labs builds Morpho, a decentralized, non-custodial lending protocol on Ethereum that lets users lend and borrow crypto assets without intermediaries. The protocol has grown to billions of dollars in assets supplied, with Morpho Blue offering a permissionless base layer for isolated lending markets.

Oxide Computer Company builds rack-scale cloud computing infrastructure for enterprises that need the agility of public cloud with the control and security of on-premises hardware. Their integrated hardware-software platform delivers a complete cloud experience in a single rack unit.

PlanetScale is a managed database platform built on Vitess that helps developers ship MySQL workloads with branching, non-blocking schema changes, and global scale.

PostHog is an open-source product analytics platform providing analytics, session recording, feature flags, A/B testing, and surveys in a single platform for developer teams building successful products.

Code intelligence platform that helps developers search, understand, and fix code.

Daytona provides secure, elastic sandbox infrastructure for running AI-generated code and agent workflows, giving developers and AI agents isolated, programmable environments with fast startup and persistent state.

Onchain governance infrastructure platform providing protocols and tools for DAOs and blockchain projects to manage voting, delegation, and community decision-making.

Botpress is an AI agent infrastructure platform that gives developers the tooling to build, deploy, and scale production-ready AI agents. Founded in 2017 and headquartered in Montréal, the company raised a $25M Series B in June 2025 to expand its agent infrastructure stack.

Corelight provides network detection and response (NDR) software built on the open-source Zeek framework, giving security teams deep network visibility and evidence for threat hunting and incident response. Its platform pairs network traffic analysis with AI-driven detections and integrates with SIEM, XDR, and SOC workflows. Corelight sells to large enterprises and U.S. federal and government agencies.

Open-source AI company building tools to structure, understand, and collaborate with unstructured data including GPT4ALL, Atlas visualization platform, and Nomic Embed text embeddings.

Ollama is an open model platform that lets developers download, run, and manage large language models locally on their own machines or servers via CLI, API, and cloud scaling, used to build chatbots, coding assistants, and AI agents. It is the largest developer network in the open model ecosystem, with roughly 8.9M monthly active developers and 67,000+ community-built integrations, and is used within 85% of the Fortune 500. Founded in 2023 by Jeffrey Morgan and Michael Chiang.

Phylo is an applied AI research laboratory developing Biomni Lab, an integrated workspace enabling scientists to plan, author, execute, and collaborate on complex biological research tasks with state-of-the-art agentic AI.

Software supply chain security platform delivering comprehensive vulnerability management with curated near-zero-CVE open-source images, automated CVE remediation, and container hardening capabilities. Simplifies FedRAMP compliance and accelerates DevSecOps workflows.

Viam is a software platform that makes the physical world programmable, enabling engineers to build, deploy, and manage robotics and IoT applications. Founded by MongoDB co-founder Eliot Horowitz, Viam powers AI and automation solutions across robotics, food and beverage, climate tech, marine, and industrial manufacturing.

AI research company building adaptive models that learn continuously without expensive retraining, using less computing power than leading AI models, founded by former Cohere VP of Research Sara Hooker

Apollo GraphQL builds GraphOS, a cloud-native platform for building, managing, and scaling unified GraphQL APIs that orchestrate data across backend services. Its open-source tools and commercial supergraph platform are used by enterprises like Walmart, Netflix, and PayPal to accelerate application development.

Browserbase provides cloud-hosted browser infrastructure purpose-built for AI agents and web automation. The platform enables developers to host, manage, and monitor headless browsers at scale with features including proxies, stealth mode, session recording, and debugging tools, serving over 20,000 developers.

Comfy develops ComfyUI, an open-source node-based platform for generative AI that enables creators to build visual AI workflows, used by over 1 million creators at companies like Netflix, Amazon Studios, and Tencent.

An all-in-one open source platform to securely manage application configuration and secrets like API keys and database credentials across teams and infrastructure.

LayerZero is an omnichain interoperability protocol that enables seamless cross-chain messaging and asset transfers across 50+ blockchains. It allows developers to build decentralized applications that operate natively across multiple networks.

Global payments infrastructure company building on Bitcoin and the Lightning Network, enabling instant low-cost money movement worldwide through APIs and SDKs for fiat, stablecoin, and bitcoin transfers.

Open-source multimodal data logging and visualization SDK for robotics and computer vision teams, enabling engineers to log, replay, and inspect spatial and temporal data.

StackBlitz is the creator of Bolt, an AI-powered full-stack web development platform that enables users to build, run, and deploy applications entirely in the browser. Leveraging WebContainers technology that runs Node.js natively in the browser.

Basis Research Institute is a nonprofit applied AI research organization building a universal reasoning engine by establishing the mathematical principles of intelligence. The organization focuses on probabilistic programming, causal reasoning, and program synthesis to solve intractable scientific and societal problems at unprecedented scale.

Bluesky is a decentralized social network built on the AT Protocol, giving users control over their social graph and enabling an open, interoperable layer for social applications. Founded as a Public Benefit Corporation in 2021, it has grown to tens of millions of users as an open-protocol alternative to X, letting users choose their own algorithms, moderation tools, and data portability.

Chroma builds open-source data infrastructure for AI, giving developers an embeddings database and retrieval layer to add memory, search, and state to LLM applications.

CrewAI builds a multi-agent platform and open-source framework for orchestrating collaborative AI agent workflows in production applications.

LM Studio is a desktop application and developer toolkit built by Element Labs Inc. that lets users discover, download, and run large language models locally and privately on their own hardware. It provides an OpenAI-compatible local API server and supports Windows, macOS, and Linux. Founded in 2022 by Yagil Burowski and headquartered in Brooklyn, New York.

Mysten Labs is the core development company behind Sui, a high-performance Layer-1 blockchain built around an object-centric data model and the Move programming language. Founded by former Meta Diem/Novi engineers, it also builds Walrus decentralized storage, Seal encryption, and DeepBook on-chain trading infrastructure.

OP Labs is the core development team behind Optimism and the open-source OP Stack, a modular framework that lets enterprises, exchanges, and DeFi protocols launch their own Ethereum-compatible Layer 2 blockchains. Partners building on the OP Stack's Superchain include Coinbase's Base, Sony, Kraken, and Uniswap, with over 65% of Ethereum Layer 2 activity running through the stack.

alphaXiv is an AI research platform that helps users understand academic papers in minutes by bringing together papers, benchmarks, and implementations in one place. The platform bridges the gap between AI research and practice, enabling engineers to quickly surface relevant papers, compare methods, and interact with implementations. Since launching in 2024, alphaXiv has reached millions of users across academia and industry.

Fully managed change data capture (CDC) streaming platform that replicates production databases into data warehouses and lakes in real time. Trusted by Substack, ClickUp, and Alloy, processing over 700 billion rows annually.

Gradium is a Paris-based AI company building ultra-low latency voice foundation models that enable near-instant, expressive, and multilingual voice AI at scale. Spun out of French AI lab Kyutai, the company was founded by former Google DeepMind researchers who pioneered key advances in audio language modeling. Backed by a $70 million seed round from FirstMark Capital, Eurazeo, Eric Schmidt, and Xavier Niel, Gradium aims to make voice the universal interface for AI.

Pinecone is a fully managed vector database that makes it easy to add vector search to production applications, powering AI applications with fast and scalable similarity search at any scale.

Sim is an open-source platform for building, shipping, and scaling agentic AI workflows, often described as "Figma for AI agents" for its visual drag-and-drop canvas. It combines a workflow editor with knowledge bases, structured data tables, file storage, and execution logging so developers can go from a single agent to complex multi-agent systems in production. Founded in early 2025 in San Francisco, it reports 60,000+ developers and 100+ companies running workflows on the platform.

Digital trust infrastructure enabling governments and enterprises to issue, verify, and manage digital identity credentials using open-source decentralized identity toolkits.

Bespoke Labs is an applied AI company that builds the reinforcement learning environments, data curation systems, and infrastructure used to train, evaluate, and post-train reliable long-horizon AI agents for frontier labs and enterprises. It is known for open-source tooling like Bespoke Curator and open datasets. Founded in 2024 by Mahesh Sathiamoorthy and Alex Dimakis, it is headquartered in Mountain View, California.

Open-source financial infrastructure platform that provides programmable ledgers, payment connectivity, orchestration tools, and reconciliation services for building modern financial applications, trusted by companies like Booksy, Doctolib, Liberis, and Shares.

Medusa builds open-source commerce infrastructure and modular APIs that let developers compose storefronts, carts, checkouts, and backend workflows without adopting a monolithic commerce stack.

Open-source, identity-aware access proxy providing zero-trust secure access to internal applications without requiring a VPN, continuously verifying user identity and device context.

Pulumi builds an infrastructure as code platform that lets engineers define and manage cloud infrastructure using general-purpose programming languages such as TypeScript, Python, Go, C#, and Java instead of bespoke DSLs. Its open-source engine is paired with Pulumi Cloud, a managed service for state, secrets, policy, and team collaboration across AWS, Azure, Google Cloud, and Kubernetes. The company is remote-first, headquartered in Seattle, and hires through Greenhouse.

Browser Use is an open-source framework that enables AI agents to autonomously navigate and interact with websites like a human user. Built by ETH Zurich alumni, the project has amassed over 80,000 GitHub stars and powers agentic AI platforms.

Checkly offers application monitoring powered by Playwright and OpenTelemetry so teams can test and monitor apps, APIs, and services as code.

Flox builds reproducible development environments for enterprise software teams, built on Nix with Nix knowledge optional. Its platform delivers cryptographically pinned environments that stay identical from a developer's laptop through CI to production, eliminating environment drift and strengthening software supply chain security. A spinout of the D. E. Shaw group, Flox offers both an open-source platform and enterprise SaaS.

GitBook is an AI-native documentation platform for technical teams that simplifies knowledge sharing with docs-as-code workflows and AI-powered search. Used by over 2 million users including Zoom and FedEx.

Ineffable Intelligence is a London-based AI research lab founded in late 2025 by David Silver, former reinforcement learning lead at Google DeepMind and creator of AlphaZero. The company is building a 'superlearner' system that discovers knowledge purely through self-directed experience and reinforcement learning, without relying on human-generated data. Its stated mission is to make first contact with superintelligence.

Inference provides a distributed, serverless platform that lets developers run open-source AI models without managing infrastructure. The company aggregates underutilized data center capacity to offer cost-effective LLM inference via a simple API.

LlamaIndex is a data framework for LLM applications that enables developers to connect, index, and query custom data sources with large language models through their open-source library and LlamaCloud platform.

MotherDuck is a serverless cloud data warehouse built on the open-source DuckDB engine, enabling fast SQL analytics with no infrastructure to manage. The platform supports hybrid local-cloud execution, allowing analysts to query data seamlessly across laptop and cloud.

Plural provides a Kubernetes management platform for deploying, operating, and governing fleets across cloud environments.

Alpen Labs builds Bitcoin infrastructure and cryptography tooling, using zero-knowledge proofs to deliver a modular rollup that makes Bitcoin scalable, private, and programmable. The remote-first team of cryptographers and engineers (ex-Blockstream, Palantir, Nethermind) is building financial rails on Bitcoin, including lending and BTC yield products. Founded in 2022, it has raised $19.1M across a seed round led by Ribbit Capital and a January 2025 strategic round led by DBA and Cyber Fund.

Open-source AI coding agent that runs in your IDE to plan, write, and edit code with your project context.

Inkeep provides a platform for customer-facing AI agents and automations, combining no-code builders with developer SDKs for support, product, GTM, and operations teams.

Lightdash is an open-source BI platform built on dbt that enables self-serve analytics and metrics for modern data teams.

Mastra is an open-source TypeScript framework for building AI agents and applications, created by the team behind Gatsby. It provides modular tools for agent orchestration, tool calling, and workflow automation.

Unified ingress platform providing developers with secure tunnels, reverse proxy, API gateway, and global load balancing used by over 7 million developers worldwide.

Open-source, ACID-compliant search & analytics database—an Elasticsearch alternative built on PostgreSQL.

Polar is an open-source billing and monetization infrastructure platform for developers and AI-native SaaS companies. It enables modern billing including subscriptions, usage-based, and events-to-billing in minutes with a few lines of code.

Poolside builds open-weight foundation models purpose-built for software engineering, including its Laguna series of agentic coding models for reasoning, code generation and execution. Founded in 2023 by former GitHub CTO Jason Warner and Eiso Kant, it sells AI coding systems to enterprises and government customers, with partnerships including AWS and U.S. Department of Defense entities. The team is ~150 people worldwide and hires almost entirely remotely across the US and EMEA.

Decentralized open-source AGI platform backed by Founders Fund and Pantera Capital, building an open AGI network where multiple AI agents collaborate in real time to prevent single-entity AGI control.

Cal.com is an open-source scheduling infrastructure platform that enables absolutely everyone to build scheduling into their applications, providing a flexible and customizable alternative to proprietary scheduling tools.

Dub is an open-source link attribution platform that powers short links, QR codes, conversion tracking, and affiliate programs for modern marketing teams. Used by over 1,000 companies including Twilio, Vercel, Perplexity, and Buffer, it provides advanced analytics and branded link management infrastructure.

FlutterFlow is a low-code visual development platform for building native mobile and web applications, used by over 1.3 million developers across 200+ countries.

Open-source metering and usage-based billing platform that enables SaaS companies to build flexible pricing models with consumption tracking, subscription management, and payment orchestration.

Developer observability for live apps: dynamic logs, metrics, traces without restarts.

Mem0 is a universal, self-improving memory layer for LLM applications that enables them to remember and learn from user interactions over time, powering personalized AI experiences with over 41,000 GitHub stars and 14 million Python package downloads.

Onlook is an open-source visual IDE for React and Next.js applications, described as 'Cursor for Designers.' It lets teams design directly in their real codebase by visually editing components while AI syncs changes back to source code in real time. Founded in 2024 and backed by Y Combinator (W25) and Leonis Capital.

Open-source model-agnostic platform for cloud coding agents that automates real engineering work securely and transparently

Pierre is an opinionated git platform that rebuilds code hosting, code review, and CI from the ground up for small engineering teams augmented by AI. Founded by Bootstrap co-creator Jacob Thornton and early Twitter engineer Ian Ownbey.

Superlinked builds information retrieval infrastructure for AI applications, combining multimodal and structured signals to improve enterprise search and matching.

Tinybird is a real-time data platform that enables data and engineering teams to build real-time data products and APIs at scale. The platform ingests, transforms, and serves large volumes of data with sub-second latency for analytics and operational intelligence.

Infinite canvas SDK for React enabling developers to build web-based whiteboards and collaborative visual experiences, powering products like ClickUp Whiteboards and Padlet Sandboxes.

Company behind TruffleHog, a leading open-source secret scanning tool with 15M+ downloads that detects, verifies, and remediates leaked API keys, tokens, and credentials across code repositories.

High-performance multiplayer code editor built in Rust by the creators of Atom and Tree-sitter, designed for speed and real-time collaboration with AI coding features, used by 150,000+ active developers.

Aleo is a Layer-1 blockchain built around zero-knowledge cryptography, enabling private, programmable, and scalable decentralized applications and payments. Founded in 2019 by Howard Wu, Collin Chin, Raymond Chu, and Michael Beller, it is now stewarded in part by the nonprofit Aleo Network Foundation.

Anaconda provides the world's most popular open-source Python and R distribution for data science and AI development. Serving over 45 million users, its platform enables enterprises to manage packages, environments, and AI workflows at scale with security and governance controls.

Appwrite is an open-source Backend-as-a-Service platform that gives developers pre-built APIs for authentication, databases, storage, real-time messaging, and serverless functions. It positions itself as a self-hostable alternative to Firebase and Supabase, and offers a managed Appwrite Cloud offering.

All-in-one web-based map builder and geospatial analysis platform that enables users to create, collaborate on, and share custom maps with built-in GIS tools.

Babylon Labs builds Bitcoin collateral infrastructure. Its Trustless Bitcoin Vaults let native BTC serve as collateral on other chains without wrapping or bridging. Its Bitcoin staking protocol lets holders stake self-custodied BTC to secure proof-of-stake chains and earn rewards. The company was co-founded by Stanford professor David Tse.

BenchFlow is a San Francisco-based frontier environment lab building a unified platform to evaluate AI models and agents using standardized, reproducible benchmarks derived from real-world tasks. It ships products such as SkillsBench, ClawsBench, and the BenchFlow runtime, supporting evaluation of coding agents, web agents, RAG systems, and call-center automation. Founded in 2024 by CEO Xiangyi Li, the company offers custom benchmarks built on reinforcement learning and open community contributions.

Black Forest Labs is a generative AI company that created FLUX, one of the most advanced open-source image generation models, and previously pioneered Latent Diffusion and Stable Diffusion. Founded by machine learning researchers Robin Rombach, Patrick Esser, and Andreas Blattmann, the company builds powerful creative AI models from labs in Freiburg, Germany and San Francisco. Valued at $3.25 billion after raising $300 million in Series B funding, Black Forest Labs is at the forefront of generative media technology.

Buster is an open-source AI-native analytics platform that gives teams AI data analysts and engineers for their data stack.

Charm builds open-source tools and libraries for the command line, including Bubble Tea, Lip Gloss, and Glow, making terminal user interfaces beautiful and developer-friendly.

Chia Network is a blockchain technology company founded by BitTorrent creator Bram Cohen that operates the open-source Chia blockchain, using a proprietary Proof of Space and Time consensus mechanism to drastically reduce the energy consumption of traditional proof-of-work systems. The company positions itself as a regulatory-compliant blockchain business and has pursued an IPO.

Community platform for fine-tuning and sharing open-source AI models like Stable Diffusion, enabling users to customize models and access a marketplace of generative AI content with over 23 million monthly visitors.

ClickHouse is an open-source column-oriented database management system built for real-time analytics on large-scale data. The company offers ClickHouse Cloud, a managed service used for observability, analytics, and AI-driven workloads by thousands of customers.

Collate is the company behind OpenMetadata, the open-source metadata platform, and offers a managed AI-powered data platform for data discovery, lineage, quality, observability, and governance. Founded in 2021 by Hadoop/Hortonworks and Uber data infrastructure veterans Suresh Srinivas and Sriharsha Chintalapani, it is based in Menlo Park, CA.

comma.ai builds openpilot, an open-source driver-assistance system, and sells aftermarket hardware (comma 3X/comma four) that adds lane centering, adaptive cruise control, and dashcam features to existing vehicles. Founded by George Hotz, the company takes a contrarian, community-driven approach to autonomous driving rather than pursuing a robotaxi fleet or OEM partnerships.

Platform for standardized, open-source commercial contract templates and contract management tools, enabling software companies to negotiate and sign B2B agreements faster.

Compound is a decentralized, open-source protocol on Ethereum that allows users to supply crypto assets to earn interest and borrow against collateral. Founded in 2017, it pioneered algorithmic money markets in DeFi and is developed by Compound Labs.

DATA Foundation (formerly Story Protocol) builds an onchain registry that records the origin, licensing terms and consent history of data used to train AI models, with tools to clean, score and pay for human data contributions.

Deep Cogito is a San Francisco AI research company building toward general superintelligence through advanced reasoning and iterative self-improvement, using its Iterated Distillation and Amplification (IDA) post-training method. It ships the open-weight Cogito model family (3B to 671B parameters) whose flagship matches or beats DeepSeek R1-0528 with roughly 60% shorter reasoning chains. Alongside the open models, it sells a post-training engine that builds specialized models on enterprises' proprietary data and outcomes.

Experimental AI product lab offering tools for content generation and editing across various media, including image and video generation, music composition, and photo editing

Echo is an AI-native software security company that builds CVE-free, vulnerability-free container base images as drop-in replacements for standard Docker images. Its AI agents strip open-source images of non-essential components to eliminate vulnerabilities at the source while preserving functionality. Founded in 2025 by ex-Argon founders Eilon Elhadad and Eylam Milner, it is headquartered in Tel Aviv with a New York office.

Expo is the open-source platform and framework (operated by 650 Industries) for building universal native apps with React Native, offering EAS cloud services for building, deploying, updating, and monitoring iOS, Android, and web apps. It recently launched Expo Agent to bring AI-assisted, forward-deployed engineering support to enterprise mobile teams.

EZKL builds zero-knowledge machine learning (zkML) infrastructure for verifying AI model inference. Its open-source tooling compiles PyTorch, TensorFlow, and scikit-learn models into zero-knowledge circuits, proving computations ran correctly without exposing sensitive inputs or model weights. EZKL also operates a high-performance proving cluster.

Feldera builds an enterprise-grade incremental view maintenance engine that converts SQL queries into incremental programs, recomputing only changed data instead of full re-scans. Founded in 2023 by five former VMware Research scientists, its engine is built on DBSP, a VLDB Best Paper-winning mathematical framework for incremental SQL computation.

Flexprice is an open-source monetization infrastructure platform built for AI-native and SaaS companies. It enables teams to operate usage-based, credit-based, and hybrid pricing models with real-time metering and reporting, following an open-core model with self-hosted or cloud deployment options.

Ghost is a non-profit organization building open source technology for modern publishing. It provides a professional blogging and newsletter platform with built-in email newsletters and paid subscriptions, used by publishers worldwide.

GitButler builds a next-generation Git client that replaces the branch-and-stash workflow with virtual branches, letting developers work on multiple changes in one working directory. Founded by GitHub co-founder Scott Chacon, the open-source Rust/Tauri desktop app adds AI-generated commit messages, unlimited undo, and version-control primitives aimed at AI coding agents. The company raised a $17M Series A led by a16z in April 2026.

Open-source, local-first AI meeting notetaker originally launched as Hyprnote (YC S25), rebranded through Char to Anarlog by parent studio Fastrepl. It transcribes and summarizes meetings entirely on-device without a bot joining calls, targeting privacy-conscious enterprise and individual users.

InsForge is a Y Combinator-backed (Spring 2026) startup building agent-native cloud infrastructure that lets AI coding agents like Claude Code, Cursor, and Codex provision and operate Postgres databases, S3-compatible storage, and compute directly. Originally an open-source backend-as-a-service alternative to Supabase, it pivoted to InstaCloud, a serverless control plane positioned against AWS, GCP, and Azure. Founded in 2025 by Hang Huang (CEO) and Tony Chang (CTO) in San Francisco.

Letta builds a platform and open source framework for stateful AI agents with memory, helping developers deploy autonomous agents that operate over long-running workflows.

LGND is building 'ChatGPT for the Earth,' a geospatial AI infrastructure platform that makes the world's satellite and geographic data as accessible and searchable as text. Using transformer-based geographic embeddings, LGND enables teams to create, adapt, and scale geospatial datasets across time and geography with reduced technical overhead.

Lightning AI is the company behind PyTorch Lightning and the Lightning AI Studio platform, which helps developers build, train, and deploy AI models in the cloud. It provides tools for AI development including GPU cloud infrastructure and collaborative coding environments.

LobeHub is an open-source AI platform that grew out of LobeChat, a self-hostable chat framework supporting any model provider, plugins, and user-owned data. It now positions itself around an "Agent Harness" runtime — an OS-like layer handling prompt presets, tool calling, planning, filesystem access, and sub-agent management — so individuals and teams can build and operate AI agent teammates. The project is community-driven with contributors worldwide and no disclosed outside funding.

Luminal builds a compiler and runtime for AI inference that treats compilation as a search (superoptimization) problem, automatically compiling models into native code optimized for GPUs, ASICs, and other hardware by auto-generating and searching high-performance kernels. It aims to push GPU utilization well above the typical 10-20%, delivering 2-3x faster inference while preserving the standard PyTorch developer workflow. A Y Combinator (S2025) company, it raised a $5.3M seed in November 2025 led by Felicis Ventures.

Mage is an open-source, AI-native data pipeline platform that enables teams to build, run, and manage data pipelines for integrating and transforming data using Python, SQL, and R. Available as both open-source and enterprise versions, it provides real-time and batch pipeline orchestration.

Mail0 (also known as Zero) is an open-source, AI-native email client that uses artificial intelligence to prioritize emails, summarize threads, draft replies, and organize inboxes into smart categories. A Y Combinator X25 batch company, it focuses on privacy-first email management that helps knowledge workers save time on email triage.

Marqo is a vector search platform that enables developers to build smarter search experiences with multimodal AI, improving conversion rates for e-commerce, recommendations, and content discovery.

Mindverse is a Singapore-based AI company building personal AI memory and identity products, best known for Me.bot (a personal 'second brain' assistant) and Second Me, an open-source AI-identity social platform. Founded by ex-Meta and NetEase veterans, it builds personalized AI agents that learn a user's habits, notes, and preferences. Investors include Square Peg, HongShan, and Ant Group.

Mistral AI is a French AI company building fast, open-source, and secure large language models for developers and enterprises. Known for efficient, high-performance models offered via API and for self-hosting.

NanoClaw is a security-focused, open-source personal AI agent that runs each agent in an isolated Docker/Linux container on Anthropic's Claude Agent SDK, connecting to WhatsApp, Slack, Telegram and other messaging apps. Built by NanoCo, it went viral with ~29K GitHub stars after its February 2026 open-source launch. NanoCo raised a $12M seed in May 2026 at a $62M valuation to build enterprise AI assistants on top of NanoClaw.

Native is a decentralized liquidity protocol enabling seamless cross-chain token swaps and DeFi integrations. It provides infrastructure for builders to embed native token exchange functionality into wallets, dApps, and exchanges.

Nx is a smart, extensible build system with first-class monorepo support, built by Nrwl (Narwhal Technologies). It provides task caching, affected-project detection, and distributed task execution via Nx Cloud to help engineering teams scale CI and development across large codebases.

OpenMind is building an open, Android-like software stack for robots to make autonomous systems easier to build, deploy, and coordinate.

Papermark is an open-source document sharing and data room platform, positioned as a self-hostable alternative to DocSend. It offers secure share links with custom domains, access controls, watermarking, and built-in per-page viewing analytics, used mainly by founders sharing pitch decks and by teams running due-diligence data rooms. Founded by Marc Seitz in 2023, it is bootstrapped and reported roughly $900K ARR without outside funding.

Pazi (formerly Pythagora, maker of the open-source GPT Pilot) is a platform for building autonomous companies from AI agents that each hold a business role and execute multi-step work across integrations.

Polars is a blazingly fast DataFrames library written in Rust, offering Python, R, Node.js, and SQL bindings for efficient, multi-threaded data manipulation at scale.

Postman is an API development and collaboration platform that enables developers to design, build, test, and document APIs. With over 30 million developers and 500,000 companies using the platform, it is the world's leading API platform. The company was founded in 2014 and reached $313M ARR at a $5.6B valuation.

Prisma builds an open-source ORM, Prisma Postgres, and related tooling for developers building modern data-intensive applications.

PrismaX is a decentralized robotics service layer that sets standards for how robots, data, and human teleoperation are deployed to advance physical AI. The platform uses token incentives to crowdsource high-quality training data and operates a decentralized teleoperations network for robotics foundation model development. It combines AI, robotics, and Web3 to address data scarcity bottlenecks in autonomous robot development.

Prismic is a headless CMS and page builder designed for modern web development, enabling marketing teams to create pages independently while developers maintain control using frameworks like Next.js, Nuxt, and SvelteKit.

ProjectDiscovery is a San Francisco-based cybersecurity company that grew out of popular open-source security tools like Nuclei, httpx, and subfinder. It offers a commercial cloud platform and AI-driven security testing product (Neo) for attack surface management and vulnerability detection, used by companies like Fastly, Microsoft, and GitLab.

Proliferate (formerly Keystone) is an open-source IDE for running multiple AI coding agents (Claude Code, Codex, Gemini, etc.) in isolated cloud sandboxes, originally launched as an autonomous on-call AI engineer that triages and fixes production bugs. Founded in 2025 by Pablo Hansen and part of YC Summer 2025.

Protocol Labs is an open-source R&D lab and innovation network founded by Juan Benet, best known for creating IPFS, Filecoin, and libp2p to decentralize the web and cloud storage. It has since grown into an ecosystem orchestrator connecting 600+ web3, AI, and frontier-tech organizations, projects, and investors.

Proximal is a San Francisco research lab and data company building high-fidelity, long-horizon RL environments and training data for frontier coding agents. It argues the bottleneck for frontier-model data is research systems rather than domain experts, and it publishes FrontierSWE, an open-source ultra-long-horizon software-engineering benchmark that current frontier models largely fail. The team was founded by Justus Mattern, Calvin Chen, and Navid Pour.

Qpoint is an egress observability and security platform that uses eBPF to give engineering and security teams visibility and control over how applications communicate with external APIs and third-party services. Its lightweight Qtap agent captures outbound traffic metadata and payloads to monitor service health, API usage, and dependencies, while Qcontrol policies enforce runtime governance and a zero-trust posture for external traffic.

Builds open-source frontier AI infrastructure including SGLang, the fastest LLM inference engine, and large-scale RL training frameworks.

AI-powered site builder and component library with 1,000+ components for Figma, Webflow, and React. Generates website sitemaps and wireframes from text prompts for dramatically faster site building.

Reworkd builds AI-powered web data extraction agents that automate the entire scraping pipeline at scale. Note: Company announced sunsetting as of February 2025.

RisingWave Labs builds RisingWave, an open-source, Postgres-compatible streaming database for real-time stream processing and analytics. It lets engineers ingest events from Kafka, CDC sources, and other streams and query them with SQL and incrementally maintained materialized views. The company is headquartered in San Francisco and offers a managed RisingWave Cloud service.

Real-time interactive design and animation tool that enables designers and developers to create functional, ship-ready graphics with open-source runtimes that run fast and store small.

Riza provides isolated code execution infrastructure for AI-generated code and agent workflows.

Screenpipe is an open source desktop AI memory platform that continuously captures screen and audio data for local search and automation.

SkyPilot is an AI compute platform that commercializes the popular open-source SkyPilot project developed at UC Berkeley's Sky Computing Lab. It acts as a control plane that pools compute across 20+ clouds, neoclouds, Kubernetes, and Slurm into a single interface, automatically routing workloads to the most available and cheapest GPUs without code rewrites. Founded by Databricks co-founder Ion Stoica with CEO Zongheng Yang, it launched from stealth in July 2026 with $20M in seed funding.

Spectro Cloud builds a unified management platform for Kubernetes, virtual machines, edge computing, and AI/GPU infrastructure across public cloud, private cloud, data centers, edge, and air-gapped environments. Its Palette and PaletteAI products let enterprises turn their own GPU servers into private AI inference platforms running open-source models, with policy-driven governance and lifecycle automation. Customers include T-Mobile, Airbus, Yum! Brands, and the U.S. Air Force.

Succinct is making zero-knowledge proofs accessible to any developer through SP1, their zkVM, and decentralized prover network that enables scalable blockchain applications and cryptographic infrastructure.

Superlogical is a new company founded by Mitchell Hashimoto (co-founder of HashiCorp, creator of Terraform, Vagrant, and Vault) along with former colleagues from HashiCorp, Vercel, Heroku, and Poolside. Their first product is a server-side terminal multiplexer with durable, long-lived sessions, aimed at becoming a foundation for a broader 'multiplexer for all work' that unifies human developers and AI agents.

Universal memory API and context engineering platform for AI applications. Provides long-term and short-term memory infrastructure for AI agents, powering enterprise APIs, developer plugins, and a personal knowledge app.

Symbolica is a pioneering AI research lab founded in 2022 that leverages category theory to deliver breakthroughs in modern artificial intelligence research by building structured reasoning in machines with formal logic and semantics at the architectural level.

Temporal provides a durable execution platform that enables developers to build reliable, fault-tolerant distributed applications. The open-source workflow orchestration engine ensures long-running processes and agentic AI workloads run to completion even in the face of failures.

TensorZero is an open-source stack for industrial-grade LLM applications with tooling for evaluation, observability, and production optimization.

Things Inc. creates Rooms, a platform for building interactive 3D spaces through drag-and-drop, editable objects, and code. The browser and iOS tool won a 2024 Apple Design Award and lets users design 3D rooms, games, and interactive experiences collaboratively.

AI research lab founded by former OpenAI CTO Mira Murati, building Tinker, an API for distributed LLM fine-tuning that makes model customization accessible without massive GPU infrastructure.

This Dot (This Dot Labs) is a US-based web platform consultancy and developer-relations firm founded by Tracy Lee and Jay Phelps, providing senior JavaScript/front-end architects for consulting, custom development, architecture assessments, and engineering training. It works with clients such as Google, Meta, Microsoft, and PayPal, and is heavily involved in open-source (RxJS, Angular, React, Vue ecosystems). NMSDC- and WBENC-certified (minority- and women-owned), headquartered in Peachtree City, Georgia, with a remote-first engineering team.

TraceRoot AI is an open-source self-healing layer for AI agents that automatically identifies and resolves production bugs. It captures traces, logs, and metrics, then uses AI agents that analyze source code and GitHub history to perform root cause analysis and auto-fix issues. Part of Y Combinator's S25 batch.

Open-source data preprocessing platform that extracts, cleans, and transforms unstructured documents (PDFs, images, HTML, emails) into structured formats optimized for AI and LLM pipelines.

Walrus is a decentralized data layer for AI and Web3 builders, designed to store large datasets, media, and application state with programmable, verifiable access on Sui.

Zama builds open-source fully homomorphic encryption technology and confidentiality infrastructure for blockchain and other privacy-preserving applications.

Zephyr Cloud is a cloud-agnostic, framework-agnostic platform providing orchestration and observability for composable micro-frontend systems, enabling enterprise teams to deploy micro-frontend changes globally in real time. Founded in 2023 by Dmitriy Shekhovtsov and Zackary Chapple, the team behind Module Federation, the company integrates with cloud providers like Cloudflare and Netlify.

Free AI content detection tool designed to distinguish between AI-generated and human-written text with advanced detection algorithms