head to head · open source
odysseus vs Onyx
odysseus has 94,935 GitHub stars, 1,862 forks, 1,233 open issues and last shipped yesterday. Onyx has 33,170 stars, 4,692 forks, 451 open issues and last shipped yesterday. odysseus leads on adoption by 186% (94,935 vs 33,170 stars). odysseus is written in Python under AGPL-3.0; Onyx is written in Python under a custom or non-standard licence. odysseus has attracted 2% as many forks as stars, Onyx 14%. Onyx was the more recently maintained of the two, and both are self-hostable with no licence fee.
Two open source projects, one decision. Both are free and self-hostable — the differences are community size, license terms, language stack and release pace.
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Side by side
| odysseus | Onyx | |
|---|---|---|
| GitHub stars | ★ 95K | ★ 33K |
| License | AGPL-3.0 | Custom / other |
| Written in | Python | Python |
| Last push | 2026-11-02 | 2026-11-02 |
| Forks | ⑂ 1.9K | ⑂ 4.7K |
| Self-hosting | Yes | Yes |
| Data ownership | Your server | Your server |
pick odysseus if
- You weight community size — 95K stars and counting
- You want the AGPL-3.0 license terms
- Your stack matches Python
- You value the larger contributor base for long-term maintenance
pick Onyx if
- You want the Onyx feature set and don't need the biggest community
- You prefer the Custom / other license terms
- Your stack matches Python
- You evaluated both and Onyx fits your workflow better
About odysseus
A self hosted AI workspace for chat, agents, research, documents, email, notes, calendar, and local model workflows. Quick Start · Setup Guide · Contributing · Roadmap Quick Start dev is the default branch and gets the newest changes first. Use main if you want the more curated branch. Open when the containers are healthy. The first admin password is printed in docker compose logs odysseus . Native installs, GPU notes, Windows/macOS instructions, HTTPS, and configuration live in the setup guide. Features Chat + Agents — local/API models, tools, MCP, files, shell, skills, and memory. Cookbook — hardware aware…
read the full odysseus overview →
About Onyx
Onyx The Open Source AI Platform Onyx is the application layer for LLMs bringing a feature rich interface that can be easily hosted by anyone. Onyx enables LLMs through advanced capabilities like RAG, web search, code execution, file creation, deep research and more. Connect your applications with over 50+ indexing based connectors provided out of the box or via MCP. [!TIP] Deploy with a single command: ⭐ Features 🔍 Agentic RAG: Get best in class search and answer quality based on hybrid index + AI Agents for information retrieval Benchmark to release soon! 🔬 Deep Research: Get in depth reports with a multi…
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Frequently asked questions
Is odysseus or Onyx more popular?
odysseus has 94,935 GitHub stars and Onyx has 33,170. odysseus has the larger community by that measure.
Are odysseus and Onyx free?
Both are open source. odysseus is licensed under AGPL-3.0, and Onyx has no licence declared in this registry. Both are free to self-host.
What is the difference between odysseus and Onyx?
odysseus is written in Python and Onyx in Python. The practical differences are community size, licence terms, language stack and release cadence — all compared in the table above.
Which should I choose, odysseus or Onyx?
Choose odysseus if you want the larger community (94,935 stars) or its AGPL-3.0 licence terms. Choose Onyx if its feature set, stack or Custom / other licence fits better. Both are self-hostable.