head to head · open source
Hermes Agent vs Fullmoon
Hermes Agent has 246,492 GitHub stars, 51,615 forks, 41,784 open issues and last shipped yesterday. Fullmoon has 2,266 stars, 220 forks, 45 open issues and last shipped 1.4 years ago. Hermes Agent leads on adoption by 10,778% (246,492 vs 2,266 stars). Hermes Agent is written in Python under MIT; Fullmoon is written in Swift under MIT. Hermes Agent has attracted 21% as many forks as stars, Fullmoon 10%. Hermes Agent 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
| Hermes Agent | Fullmoon | |
|---|---|---|
| GitHub stars | ★ 246K | ★ 2.3K |
| License | MIT | MIT |
| Written in | Python | Swift |
| Last push | 2026-09-17 | 2025-05-05 |
| Forks | ⑂ 52K | ⑂ 220 |
| 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 Fullmoon if
- You want the Fullmoon feature set and don't need the biggest community
- You prefer the MIT license terms
- Your stack matches Swift
- You evaluated both and Fullmoon 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 Fullmoon
Fullmoon is an iOS application for chatting with local large language models, built in Swift and released under the MIT license. It is optimized for Apple silicon and runs across iPhone, iPad, and Mac, with chat history stored locally on the device and a customizable interface. The project lives in the Apple ecosystem and depends on MLX Swift, Apple's array framework for machine learning research on Apple silicon.
read the full Fullmoon overview →
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Frequently asked questions
Is Hermes Agent or Fullmoon more popular?
Hermes Agent has 246,492 GitHub stars and Fullmoon has 2,266. Hermes Agent has the larger community by that measure.
Are Hermes Agent and Fullmoon free?
Both are open source. Hermes Agent is licensed under MIT and Fullmoon under MIT. Neither carries a licence fee.
What is the difference between Hermes Agent and Fullmoon?
Hermes Agent is written in Python and Fullmoon in Swift. 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 Fullmoon?
Choose Hermes Agent if you want the larger community (246,492 stars) or its MIT licence terms. Choose Fullmoon if its feature set, stack or MIT licence fits better. Both are self-hostable.