Open Source AI Startup Jobs

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

Cloud platform for running and fine-tuning open-source AI models at scale.

Platform for deploying and scaling machine learning models in production.

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

Framework and platform for developing applications powered by large language models.

Static analysis tool for finding bugs, detecting vulnerabilities, and enforcing code standards.

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

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

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.

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

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.

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

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

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

AI platform providing reinforcement learning operations (RLOps) tools that enable organizations to customize, evaluate, and serve specialized large language models for production use cases. Founded by key contributors to the Falcon and BLOOM open-source LLM projects.

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

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.

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.

Anysphere builds Cursor, an AI-native coding environment for software teams, integrating LLM-assisted editing, agent workflows, and developer tooling.

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.

Astral builds high-performance Python developer tooling, including Ruff, uv, and ty, with a focus on fast local workflows and production-grade packaging.

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.

Better Auth builds an authentication framework for TypeScript teams, combining open source auth primitives with managed infrastructure for sessions, identity, fraud controls, and user management.

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.

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.

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.

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.

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

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.

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

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.

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.

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

CodeRabbit is an AI-powered code review platform designed to help developers automatically identify bugs and improve code quality:contentReference[oaicite:4]{index=4}.

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.

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.

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

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

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

AI-powered code editor and pair programming tool built by Anysphere, helping developers code faster with intelligent autocomplete, codebase chat, and AI-assisted coding features.

Dagster builds open-source and commercial orchestration tooling that helps data teams ship, observe, and scale pipelines with a modern developer experience.

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.

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

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.

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.

Model serving and fine-tuning platform for open and custom LLMs, designed for high-performance, cost-efficient inference.

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 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.

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.

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.

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.

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.

Graphite is a developer productivity platform providing AI-powered code review and stacked pull request tools for engineering teams. The platform serves tens of thousands of engineers at over 500 companies including Shopify, Snowflake, Figma, and Perplexity. Graphite was acquired by Cursor (Anysphere) in December 2025 for a price well above its $290 million valuation.

Hugging Face is the leading open-source AI platform for building, training, and deploying machine learning models. It hosts hundreds of thousands of models and datasets, serving as the central hub for the AI developer community.

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.

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

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.

Instill AI is a persistent AI workspace that transforms complex documents into actionable insights. Users can upload unstructured data such as financial reports, legal contracts, and research papers, ask questions across entire projects, and receive answers traced to specific sources with no coding required.

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.

Langfuse is an open source LLM engineering platform providing observability, prompt management, evaluations, and datasets for AI application development. Acquired by ClickHouse in January 2026, the platform integrates with OpenTelemetry, LangChain, OpenAI SDK, and other major frameworks.

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.

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

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.

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.

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.

LMArena develops and operates large-model evaluation infrastructure, including comparative benchmarks and community-driven testing workflows for frontier LLMs.

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.

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.

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.

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.

Mistral AI develops frontier foundation models and enterprise AI products, including open-weight and commercial offerings for assistants, agents, and production deployment.

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.

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.

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.

Neon is a serverless Postgres platform that separates storage and compute to enable instant database branching, autoscaling to zero, and bottomless storage. Acquired by Databricks for approximately $1 billion in May 2025, Neon continues as an independent product.

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

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

Onyx is an open-source AI platform that connects to your company's docs, apps, and people, enabling enterprise search and AI-assisted knowledge retrieval across 40+ internal data sources. Used by hundreds of thousands of users including Netflix and Ramp, backed by Khosla Ventures and First Round Capital.

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

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

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.

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.

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.

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.

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

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.

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.

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.

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.

Prior Labs builds tabular foundation models that understand spreadsheets and databases, enabling instant pattern inference across any dataset without task-specific training. Their flagship model TabPFN, trained on 130 million synthetic datasets, ranks #1 on the TabArena benchmark and scales to 10 million rows, serving Fortune 500 companies like Hitachi.

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

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.

Pythagora builds an AI software development platform that helps teams generate, test, and ship applications faster, building on its open-source GPT Pilot project.

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

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.

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.

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.

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

AI model API platform that lets developers run open-source machine learning models for image, video, audio, and text generation via a simple API. Acquired by Cloudflare in November 2025.

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

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.

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.

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.

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

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

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.

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

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

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.

Story provides AI-native blockchain infrastructure for registering, licensing, and monetizing intellectual property across the internet.

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.

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.

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

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.

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.

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.

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.

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.

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

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.

VoidZero is dedicated to building an open-source, high-performance, and unified development toolchain for the JavaScript ecosystem founded by Evan You, creator of Vue.js and Vite, with deep expertise in JavaScript tooling.

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.

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.

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

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.

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