Best free Claude alternatives (open source, 2026)
Updated · 20 repos compared · data refreshed nightly from GitHub
The best free Claude alternative for most people is open-webui (156k GitHub stars). jan works on a Mac according to its README. All 20 options below are open source and run on your own computer or server, so there's no subscription.
Claude (AI chat assistant) is a paid, closed-source product. The open-source projects below do the same job and run on your own computer or server. Stars and activity come straight from GitHub.
Top picks
User-friendly AI Interface (Supports Ollama, OpenAI API, ...)
- Needs:
- Hardware not stated in its README
- Trade-off
- Better than Claude: the biggest community (156k stars), very active development. Worse: license not detected by GitHub; check it before commercial use.
Enhanced ChatGPT Clone: Features Agents, MCP, Skills, DeepSeek, Anthropic, AWS, OpenAI, Responses API, Azure, Groq, o1, GPT-5, Mistral, OpenRouter, Vertex AI, Gemini, Artifacts, AI model switching, me
- Needs:
- Hardware not stated in its README
- Trade-off
- Better than Claude: a permissive MIT license, very active development. Worse: you install and run it yourself instead of Claude's hosted app.
Jan is an open source alternative to ChatGPT that runs 100% offline on your computer.
- Needs:
- works on Mac (per README)
- Trade-off
- Better than Claude: very active development. Worse: license not detected by GitHub; check it before commercial use.
Comparison
✓ yes · ✗ no · – not stated in the README. Hardware details are read from each README and may be incomplete.
Claude vs open source: what you give up
- Setup. Claude is ready as soon as you sign up. These projects need installing, usually with Python, Node or Docker.
- Hardware. Most READMEs don't state hardware needs; heavier models run much faster with a GPU. 1 says it runs on a regular CPU. 4 mention Mac support.
- Polish and support. Paid products usually have a smoother interface, managed updates and customer support. Open source gives you privacy, no usage limits and no monthly bill.
- Maintenance. 16 of 20 were updated in the last 30 days.
- License. 15 of 20 use a standard open-source license (MIT, Apache, GPL and similar). Check the license before commercial use.
How we picked
Projects that describe themselves as a Claude alternative come first, then projects that do the same job, ranked by how well they match and by GitHub stars. Projects that need a paid API key, and projects from Claude's own company, are left out. Stars and activity are verified with the GitHub API every night; hardware details come from each README. Full method.
FAQ
Is there a free alternative to Claude?
Yes. We list 20 free, open-source GitHub projects that do the same job as Claude. The most popular are open-webui, unsloth and LibreChat.
What is the best open-source Claude alternative?
It depends on your setup. Best overall: open-webui. Also excellent: LibreChat. Mac users: jan. Compare GitHub stars, license and hardware needs in the table on this page.
Can I run a Claude alternative on a Mac?
Yes. According to their READMEs, jan, natively-cluely-ai-assistant and unsloth run on macOS.
Do I need a GPU to replace Claude?
Most READMEs don't state hardware needs. 1 says it runs on a regular CPU, including HuixiangDou.
Are these Claude alternatives really free?
Yes. All 20 are open source on GitHub, and projects that need a paid API key are left out. 15 use a standard open-source license such as MIT, Apache or GPL; check the license before commercial use.