head to head · open source
Open WebUI vs moltis
Open WebUI has 152,394 GitHub stars, 22,296 forks, 294 open issues and last shipped yesterday. moltis has 2,865 stars, 347 forks, 83 open issues and last shipped 3 days ago. Open WebUI leads on adoption by 5,219% (152,394 vs 2,865 stars). Open WebUI is written in Python under a custom or non-standard licence; moltis is written in Rust under MIT. Open WebUI has attracted 15% as many forks as stars, moltis 12%. Open WebUI was the more recently maintained of the two, and both are self-hostable with no licence fee. The two share 2 topic tags (llm, mcp), 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
| Open WebUI | moltis | |
|---|---|---|
| GitHub stars | ★ 152K | ★ 2.9K |
| License | Custom / other | MIT |
| Written in | Python | Rust |
| Last push | 2026-09-17 | 2026-09-15 |
| Forks | ⑂ 22K | ⑂ 347 |
| Self-hosting | Yes | Yes |
| Data ownership | Your server | Your server |
pick Open WebUI if
- You weight community size — 152K stars and counting
- You want the Custom / other license terms
- Your stack matches Python
- You value the larger contributor base for long-term maintenance
pick moltis if
- You want the moltis feature set and don't need the biggest community
- You prefer the MIT license terms
- Your stack matches Rust
- You evaluated both and moltis fits your workflow better
About Open WebUI
Open WebUI is a self hosted, open source AI interface that unifies access to local and cloud based large language models. It runs entirely in a web browser and supports Ollama for local model hosting alongside any OpenAI compatible API, including services like LMStudio, GroqCloud, Mistral, and OpenRouter. Built in Python, it functions as a drop in replacement for proprietary AI platforms, giving users full control over their model infrastructure and data.
read the full Open WebUI overview →
About moltis
Moltis is a secure persistent personal agent server written in Rust and released under the MIT license. It lives in the Rust AI agent and self hosted assistant ecosystem, and it presents itself as one binary that runs on user owned hardware. The project targets a personal agent that can keep state across sessions, call language models from multiple providers, and expose its behavior through chat channels and tools without relying on a hosted service.
read the full moltis overview →
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Frequently asked questions
Is Open WebUI or moltis more popular?
Open WebUI has 152,394 GitHub stars and moltis has 2,865. Open WebUI has the larger community by that measure.
Are Open WebUI and moltis free?
Both are open source. Open WebUI has no licence declared in this registry, and moltis is licensed under MIT. Both are free to self-host.
What is the difference between Open WebUI and moltis?
Open WebUI is written in Python and moltis in Rust. The practical differences are community size, licence terms, language stack and release cadence — all compared in the table above.
Which should I choose, Open WebUI or moltis?
Choose Open WebUI if you want the larger community (152,394 stars) or its Custom / other licence terms. Choose moltis if its feature set, stack or MIT licence fits better. Both are self-hostable.