head to head · open source
Jan vs jev-chat-jarvis
Jan has 44,721 GitHub stars, 3,062 forks, 521 open issues and last shipped yesterday. jev-chat-jarvis has 7,181 stars, 1,215 forks, 29 open issues and last shipped 2 days ago. Jan leads on adoption by 523% (44,721 vs 7,181 stars). Jan is written in Rust under a custom or non-standard licence; jev-chat-jarvis is written in Kotlin under MIT. Jan has attracted 7% as many forks as stars, jev-chat-jarvis 17%. Jan was the more recently maintained of the two, and both are self-hostable with no licence fee. The two share 1 topic tag (llm), 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
| Jan | jev-chat-jarvis | |
|---|---|---|
| GitHub stars | ★ 45K | ★ 7.2K |
| License | Custom / other | MIT |
| Written in | Rust | Kotlin |
| Last push | 2026-09-30 | 2026-09-29 |
| Forks | ⑂ 3.1K | ⑂ 1.2K |
| Self-hosting | Yes | Yes |
| Data ownership | Your server | Your server |
pick Jan if
- You weight community size — 45K stars and counting
- You want the Custom / other license terms
- Your stack matches Rust
- You value the larger contributor base for long-term maintenance
pick jev-chat-jarvis if
- You want the jev-chat-jarvis feature set and don't need the biggest community
- You prefer the MIT license terms
- Your stack matches Kotlin
- You evaluated both and jev-chat-jarvis fits your workflow better
About Jan
Jan is an open source desktop application that serves as a ChatGPT replacement, enabling users to run large language models (LLMs) locally on their machines or connect to cloud based providers like OpenAI and Anthropic. It is built with Tauri, TypeScript, and integrates llama.cpp for efficient local inference, targeting privacy conscious users who want full control over their AI workflows without sending data to third parties.
About jev-chat-jarvis
Jev Chat Jarvis is an open source Android conversation copilot, written in Kotlin and released under the MIT licence, that reads the chat screen in supported apps such as QQ, X and Feishu, proposes ranked candidate replies, and fills the one you pick into the input box without ever sending it for you.
read the full jev-chat-jarvis overview →
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Frequently asked questions
Is Jan or jev-chat-jarvis more popular?
Jan has 44,721 GitHub stars and jev-chat-jarvis has 7,181. Jan has the larger community by that measure.
Are Jan and jev-chat-jarvis free?
Both are open source. Jan has no licence declared in this registry, and jev-chat-jarvis is licensed under MIT. Both are free to self-host.
What is the difference between Jan and jev-chat-jarvis?
Jan is written in Rust and jev-chat-jarvis in Kotlin. The practical differences are community size, licence terms, language stack and release cadence — all compared in the table above.
Which should I choose, Jan or jev-chat-jarvis?
Choose Jan if you want the larger community (44,721 stars) or its Custom / other licence terms. Choose jev-chat-jarvis if its feature set, stack or MIT licence fits better. Both are self-hostable.