head to head · open source
odysseus vs FastGPT
odysseus has 87,371 GitHub stars, 907 forks, 1,233 open issues and last shipped 2 days ago. FastGPT has 29,690 stars, 7,321 forks, 172 open issues and last shipped yesterday. odysseus leads on adoption by 194% (87,371 vs 29,690 stars). odysseus is written in Python under AGPL-3.0; FastGPT is written in TypeScript under a custom or non-standard licence. odysseus has attracted 1% as many forks as stars, FastGPT 25%. FastGPT 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.
← all 15422 open source comparisons
Side by side
| odysseus | FastGPT | |
|---|---|---|
| GitHub stars | ★ 87K | ★ 30K |
| License | AGPL-3.0 | Custom / other |
| Written in | Python | TypeScript |
| Last push | 2026-09-17 | 2026-09-18 |
| Forks | ⑂ 907 | ⑂ 7.3K |
| Self-hosting | Yes | Yes |
| Data ownership | Your server | Your server |
pick odysseus if
- You weight community size — 87K 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 FastGPT if
- You want the FastGPT feature set and don't need the biggest community
- You prefer the Custom / other license terms
- Your stack matches TypeScript
- You evaluated both and FastGPT fits your workflow better
About odysseus
Odysseus is a self hosted AI workspace written in Python and released under the AGPL 3.0 or later licence, built for people who want chat, agents, research, documents, email, notes, tasks, and calendar in one deployment on infrastructure they control.
read the full odysseus overview →
About FastGPT
FastGPT is an open source AI knowledge base platform built on large language models (LLMs). It provides integrated tools for data ingestion, vector retrieval (RAG), and visual workflow orchestration, enabling users to construct and deploy question answering applications without writing extensive backend code. The platform runs on Next.js and supports integration with multiple LLM providers including OpenAI, Claude, DeepSeek, Qwen, and others.
read the full FastGPT overview →
More in AI & Machine Learning
Related comparisons
More AI Interaction & Interfaces projects
Compare either of these against the rest of the AI Interaction & Interfaces field.
Frequently asked questions
Is odysseus or FastGPT more popular?
odysseus has 87,371 GitHub stars and FastGPT has 29,690. odysseus has the larger community by that measure.
Are odysseus and FastGPT free?
Both are open source. odysseus is licensed under AGPL-3.0, and FastGPT has no licence declared in this registry. Both are free to self-host.
What is the difference between odysseus and FastGPT?
odysseus is written in Python and FastGPT in TypeScript. 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 FastGPT?
Choose odysseus if you want the larger community (87,371 stars) or its AGPL-3.0 licence terms. Choose FastGPT if its feature set, stack or Custom / other licence fits better. Both are self-hostable.