head to head · open source
Hermes Agent vs AionUi
Hermes Agent has 246,492 GitHub stars, 51,615 forks, 41,784 open issues and last shipped yesterday. AionUi has 32,909 stars, 3,404 forks, 905 open issues and last shipped 9 days ago. Hermes Agent leads on adoption by 649% (246,492 vs 32,909 stars). Hermes Agent is written in Python under MIT; AionUi is written in TypeScript under Apache-2.0. Hermes Agent has attracted 21% as many forks as stars, AionUi 10%. Hermes Agent was the more recently maintained of the two, and both are self-hostable with no licence fee. The two share 4 topic tags (ai, ai-agent, claude-code, codex), so they are genuine substitutes rather than adjacent tools.
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
| Hermes Agent | AionUi | |
|---|---|---|
| GitHub stars | ★ 246K | ★ 33K |
| License | MIT | Apache-2.0 |
| Written in | Python | TypeScript |
| Last push | 2026-09-17 | 2026-09-09 |
| Forks | ⑂ 52K | ⑂ 3.4K |
| Self-hosting | Yes | Yes |
| Data ownership | Your server | Your server |
pick Hermes Agent if
- You weight community size — 246K stars and counting
- You want the MIT license terms
- Your stack matches Python
- You value the larger contributor base for long-term maintenance
pick AionUi if
- You want the AionUi feature set and don't need the biggest community
- You prefer the Apache-2.0 license terms
- Your stack matches TypeScript
- You evaluated both and AionUi fits your workflow better
About Hermes Agent
Hermes Agent is a desktop AI agent developed by Nous Research that maintains persistent memory and self improving capabilities across sessions and platforms. It operates as a local first, cross platform interface for LLMs, integrating with multiple model providers and deployment environments without vendor lock in. The agent implements a closed learning loop where it curates its own memory, creates and refines skills from experience, and supports cross session recall via full text search and summarization.
read the full Hermes Agent overview →
About AionUi
AionUi is an open source, cross platform Cowork application that puts AI agents to work alongside the user on their own computer. It is written in TypeScript and released under the Apache 2.0 license, and it lives in the AI agent and chat tooling ecosystem alongside the command line agents it is built to host. Rather than acting as a plain chat client, it runs a built in agent engine that can read and write files, search the web, generate images, and call Model Context Protocol tools, while showing the user every action the agent takes and keeping approval in the user's hands.
read the full AionUi overview →
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Frequently asked questions
Is Hermes Agent or AionUi more popular?
Hermes Agent has 246,492 GitHub stars and AionUi has 32,909. Hermes Agent has the larger community by that measure.
Are Hermes Agent and AionUi free?
Both are open source. Hermes Agent is licensed under MIT and AionUi under Apache-2.0. Neither carries a licence fee.
What is the difference between Hermes Agent and AionUi?
Hermes Agent is written in Python and AionUi 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, Hermes Agent or AionUi?
Choose Hermes Agent if you want the larger community (246,492 stars) or its MIT licence terms. Choose AionUi if its feature set, stack or Apache-2.0 licence fits better. Both are self-hostable.