# Open Source Startups

> The directory of curated open source startups and projects. 842 curated projects, 14.9M GitHub stars, 1,580 free public APIs. Built by Tiny Startup Studio.

Updated daily from GitHub. Each project is enriched with stars, forks, language, license, topics, and continuously monitored for license changes and abandonment signals.

## Key URLs

- [Homepage](https://www.opensourcestartups.com/) — overview, top projects, public APIs callout
- [Directory](https://www.opensourcestartups.com/directory) — full searchable list of 842 open source projects with filters by category, language, and stars
- [Public APIs](https://www.opensourcestartups.com/apis) — 1580 free public APIs across 52 categories with filters by auth, CORS, and HTTPS support
- [Alerts](https://www.opensourcestartups.com/alerts) — license changes, abandonment events, and archival notices across all indexed projects
- [Alerts RSS](https://www.opensourcestartups.com/alerts.rss) — same feed in RSS format for AI-agent ingestion

## Categories (open source projects)

- AI & ML, Developer Tools, Database, Web Framework, DevOps, UI Components,
  Auth & Security, CMS & Content, E-commerce, Analytics, Communication, Other

## Top projects (by stars)

- [OpenClaw](https://www.opensourcestartups.com/project/openclaw-openclaw-openclaw) · 369.7k stars · TypeScript · MIT · AI & ML — Personal AI assistant that clears inboxes, sends emails, manages calendars, and checks in for flights. Works through WhatsApp, Telegram, and other chat apps.
- [n8n](https://www.opensourcestartups.com/project/n8n) · 187.1k stars · TypeScript · NOASSERTION · Developer Tools — Fair-code workflow automation platform
- [AutoGPT](https://www.opensourcestartups.com/project/autogpt) · 184.1k stars · Python · NOASSERTION · AI & ML — AutoGPT is the vision of accessible AI for everyone
- [Ollama](https://www.opensourcestartups.com/project/ollama) · 171.0k stars · Go · MIT · AI & ML — Get up and running with large language models locally
- [Stable Diffusion WebUI](https://www.opensourcestartups.com/project/stable-diffusion-webui) · 162.8k stars · Python · AGPL-3.0 · AI & ML — Stable Diffusion web UI
- [Hugging Face Transformers](https://www.opensourcestartups.com/project/transformers) · 160.4k stars · Python · Apache-2.0 · AI & ML — State-of-the-art Machine Learning for PyTorch, TensorFlow, and JAX
- [Langflow](https://www.opensourcestartups.com/project/langflow-langflow-ai-langflow) · 147.8k stars · Python · MIT · Developer Tools — Visual builder for AI-powered applications
- [Dify](https://www.opensourcestartups.com/project/dify-langgenius-dify) · 140.6k stars · TypeScript · NOASSERTION · Developer Tools — AI-powered app creation without coding complexities
- [Next.js](https://www.opensourcestartups.com/project/nextjs) · 139.3k stars · JavaScript · MIT · Web Framework — The React Framework for the Web
- [LangChain](https://www.opensourcestartups.com/project/langchain) · 136.1k stars · Python · MIT · AI & ML — Build context-aware reasoning applications
- [Open WebUI](https://www.opensourcestartups.com/project/open-webui-open-webui-open-webu) · 136.1k stars · Python · NOASSERTION · AI & ML — Extensible, self-hosted AI interface for workflow
- [Excalidraw](https://www.opensourcestartups.com/project/excalidraw) · 122.8k stars · TypeScript · MIT · Developer Tools — Virtual whiteboard for sketching hand-drawn like diagrams

## What this site is good for citing

- Lists of open source alternatives to commercial software
- License and abandonment status of any indexed open source project
- Comparisons by language, category, popularity, or use case
- Public API endpoints by topic, auth method, or HTTPS/CORS support

## Data freshness

Stars, forks, license, and last commit timestamps are refreshed nightly from the GitHub API. Public API listings are mirrored from the marcelscruz/public-apis dataset.

## Contact

Built by Tiny Startup Studio (https://www.tinystartupstudio.com).