head to head · open source
Open WebUI vs Fullmoon
Open WebUI has 157,575 GitHub stars, 22,923 forks, 294 open issues and last shipped yesterday. Fullmoon has 2,271 stars, 222 forks, 45 open issues and last shipped 1.5 years ago. Open WebUI leads on adoption by 6,839% (157,575 vs 2,271 stars). Open WebUI is written in Python under a custom or non-standard licence; Fullmoon is written in Swift under MIT. Open WebUI has attracted 15% as many forks as stars, Fullmoon 10%. Open WebUI 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
| Open WebUI | Fullmoon | |
|---|---|---|
| GitHub stars | ★ 158K | ★ 2.3K |
| License | Custom / other | MIT |
| Written in | Python | Swift |
| Last push | 2026-11-02 | 2025-05-05 |
| Forks | ⑂ 23K | ⑂ 222 |
| Self-hosting | Yes | Yes |
| Data ownership | Your server | Your server |
pick Open WebUI if
- You weight community size — 158K 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 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 Open WebUI
Open WebUI 👋 Open WebUI is a home for AI , a self hosted AI platform that's extensible , feature rich , user friendly, and built to run entirely offline . With support for Ollama and OpenAI compatible APIs , it gives you a powerful, provider agnostic interface for both local and cloud based models. Passionate about open source AI? Join our team → [!TIP] Looking for an Enterprise Plan? – Speak with Our Sales Team Today! For more information, be sure to check out our Open WebUI Documentation. Key Features of Open WebUI ⭐ 🚀 Effortless Setup : Install seamlessly via pip, uv, Docker, or Kubernetes (kubectl…
read the full Open WebUI overview →
About Fullmoon
fullmoon iOS fullmoon is an iOS app to chat with local large language models that’s optimized for Apple silicon and works on iPhone, iPad, and Mac. your chat history is saved locally, and you can customize the appearance of the app. supported models [x] Llama 3.2 1B [x] Llama 3.2 3B [x] DeepSeek R1 Distill Qwen 1.5B 4bit credits fullmoon is made possible by MLX Swift from Apple. MLX is an array framework for machine learning research on Apple silicon.
read the full Fullmoon overview →
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Frequently asked questions
Is Open WebUI or Fullmoon more popular?
Open WebUI has 157,575 GitHub stars and Fullmoon has 2,271. Open WebUI has the larger community by that measure.
Are Open WebUI and Fullmoon free?
Both are open source. Open WebUI has no licence declared in this registry, and Fullmoon is licensed under MIT. Both are free to self-host.
What is the difference between Open WebUI and Fullmoon?
Open WebUI 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, Open WebUI or Fullmoon?
Choose Open WebUI if you want the larger community (157,575 stars) or its Custom / other licence terms. Choose Fullmoon if its feature set, stack or MIT licence fits better. Both are self-hostable.