head to head · open source
odysseus vs Ptero
odysseus has 87,371 GitHub stars, 907 forks, 1,233 open issues and last shipped 2 days ago. Ptero has 1,276 stars, 14 forks, 0 open issues and last shipped 4 days ago. odysseus leads on adoption by 6,747% (87,371 vs 1,276 stars). odysseus is written in Python under AGPL-3.0; Ptero is written in PHP under Apache-2.0. odysseus has attracted 1% as many forks as stars, Ptero 1%. odysseus 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 | Ptero | |
|---|---|---|
| GitHub stars | ★ 87K | ★ 1.3K |
| License | AGPL-3.0 | Apache-2.0 |
| Written in | Python | PHP |
| Last push | 2026-09-17 | 2026-09-15 |
| Forks | ⑂ 907 | ⑂ 14 |
| 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 Ptero if
- You want the Ptero feature set and don't need the biggest community
- You prefer the Apache-2.0 license terms
- Your stack matches PHP
- You evaluated both and Ptero 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 Ptero
Ptero is a free, open source AI chat platform that provides access to multiple large language models through a single, clean interface. It is designed for developers, students, and creators who value privacy and simplicity, and it requires no signup to use. The project lives in the PHP and JavaScript ecosystem: the frontend is built with JavaScript, HTML, and CSS, while the backend uses PHP and a REST API, primarily for its WordPress integration. It sits in the AI and Machine Learning category, specifically under AI Interaction and Interfaces.
read the full Ptero 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 Ptero more popular?
odysseus has 87,371 GitHub stars and Ptero has 1,276. odysseus has the larger community by that measure.
Are odysseus and Ptero free?
Both are open source. odysseus is licensed under AGPL-3.0 and Ptero under Apache-2.0. Neither carries a licence fee.
What is the difference between odysseus and Ptero?
odysseus is written in Python and Ptero in PHP. 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 Ptero?
Choose odysseus if you want the larger community (87,371 stars) or its AGPL-3.0 licence terms. Choose Ptero if its feature set, stack or Apache-2.0 licence fits better. Both are self-hostable.