head to head · open source
Open WebUI vs AionUi
Open WebUI has 152,394 GitHub stars, 22,296 forks, 294 open issues and last shipped yesterday. AionUi has 32,909 stars, 3,404 forks, 905 open issues and last shipped 9 days ago. Open WebUI leads on adoption by 363% (152,394 vs 32,909 stars). Open WebUI is written in Python under a custom or non-standard licence; AionUi is written in TypeScript under Apache-2.0. Open WebUI has attracted 15% as many forks as stars, AionUi 10%. Open WebUI was the more recently maintained of the two, and both are self-hostable with no licence fee. The two share 1 topic tag (ai), 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 | AionUi | |
|---|---|---|
| GitHub stars | ★ 152K | ★ 33K |
| License | Custom / other | Apache-2.0 |
| Written in | Python | TypeScript |
| Last push | 2026-09-17 | 2026-09-09 |
| Forks | ⑂ 22K | ⑂ 3.4K |
| 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 AionUi if
- You want the AionUi feature set and don't need the biggest community
- You prefer the Apache-2.0 license terms
- Your stack matches TypeScript
- You evaluated both and AionUi 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 AionUi
AionUi is an open source, cross platform Cowork application that puts AI agents to work alongside the user on their own computer. It is written in TypeScript and released under the Apache 2.0 license, and it lives in the AI agent and chat tooling ecosystem alongside the command line agents it is built to host. Rather than acting as a plain chat client, it runs a built in agent engine that can read and write files, search the web, generate images, and call Model Context Protocol tools, while showing the user every action the agent takes and keeping approval in the user's hands.
read the full AionUi overview →
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Frequently asked questions
Is Open WebUI or AionUi more popular?
Open WebUI has 152,394 GitHub stars and AionUi has 32,909. Open WebUI has the larger community by that measure.
Are Open WebUI and AionUi free?
Both are open source. Open WebUI has no licence declared in this registry, and AionUi is licensed under Apache-2.0. Both are free to self-host.
What is the difference between Open WebUI and AionUi?
Open WebUI is written in Python and AionUi in TypeScript. 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 AionUi?
Choose Open WebUI if you want the larger community (152,394 stars) or its Custom / other licence terms. Choose AionUi if its feature set, stack or Apache-2.0 licence fits better. Both are self-hostable.