head to head · open source
Open WebUI vs AGenUI
Open WebUI has 152,394 GitHub stars, 22,296 forks, 294 open issues and last shipped yesterday. AGenUI has 1,151 stars, 167 forks, 7 open issues and last shipped yesterday. Open WebUI leads on adoption by 13,140% (152,394 vs 1,151 stars). Open WebUI is written in Python under a custom or non-standard licence; AGenUI is written in C++ under Apache-2.0. Open WebUI has attracted 15% as many forks as stars, AGenUI 15%. AGenUI was the more recently maintained of the two, and both are self-hostable with no licence fee. The two share 1 topic tag (llm-ui), 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 | AGenUI | |
|---|---|---|
| GitHub stars | ★ 152K | ★ 1.2K |
| License | Custom / other | Apache-2.0 |
| Written in | Python | C++ |
| Last push | 2026-09-17 | 2026-09-17 |
| Forks | ⑂ 22K | ⑂ 167 |
| 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 AGenUI if
- You want the AGenUI feature set and don't need the biggest community
- You prefer the Apache-2.0 license terms
- Your stack matches C++
- You evaluated both and AGenUI 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 AGenUI
AGenUI is a native SDK for rendering generative user interfaces on mobile devices across iOS, Android, and HarmonyOS. It is built on, and fully implements, the A2UI v0.9 protocol open sourced by Google, and it sits in the AI interaction and interface layer of the ecosystem: the LLM produces structured component descriptions, which AGenUI receives as streaming data and turns into live native UI. Under the hood, a shared C++ core engine dispatches the component protocol, while three separate platform rendering engines draw the result using each operating system's own UI capabilities. The project is licensed under A…
read the full AGenUI overview →
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Frequently asked questions
Is Open WebUI or AGenUI more popular?
Open WebUI has 152,394 GitHub stars and AGenUI has 1,151. Open WebUI has the larger community by that measure.
Are Open WebUI and AGenUI free?
Both are open source. Open WebUI has no licence declared in this registry, and AGenUI is licensed under Apache-2.0. Both are free to self-host.
What is the difference between Open WebUI and AGenUI?
Open WebUI is written in Python and AGenUI in C++. 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 AGenUI?
Choose Open WebUI if you want the larger community (152,394 stars) or its Custom / other licence terms. Choose AGenUI if its feature set, stack or Apache-2.0 licence fits better. Both are self-hostable.