head to head · open source
Open WebUI vs BotSharp
Open WebUI has 152,426 GitHub stars, 22,301 forks, 294 open issues and last shipped yesterday. BotSharp has 3,103 stars, 651 forks, 48 open issues and last shipped 2 days ago. Open WebUI leads on adoption by 4,812% (152,426 vs 3,103 stars). Open WebUI is written in Python under a custom or non-standard licence; BotSharp is written in C# under Apache-2.0. Open WebUI has attracted 15% as many forks as stars, BotSharp 21%. 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.
← all 13541 open source comparisons
Side by side
| Open WebUI | BotSharp | |
|---|---|---|
| GitHub stars | ★ 152K | ★ 3.1K |
| License | Custom / other | Apache-2.0 |
| Written in | Python | C# |
| Last push | 2026-09-18 | 2026-09-17 |
| Forks | ⑂ 22K | ⑂ 651 |
| 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 BotSharp if
- You want the BotSharp 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 BotSharp 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 BotSharp
BotSharp is an open source AI multi agent framework for .NET that connects large language models to existing business applications, and it is aimed at C enterprise developers who want agent orchestration and conversation state to live inside their own information systems rather than in a separate stack.
read the full BotSharp overview →
More in AI & Machine Learning
Related comparisons
More AI Interaction & Interfaces projects
Compare either of these against the rest of the AI Interaction & Interfaces field.
Frequently asked questions
Is Open WebUI or BotSharp more popular?
Open WebUI has 152,426 GitHub stars and BotSharp has 3,103. Open WebUI has the larger community by that measure.
Are Open WebUI and BotSharp free?
Both are open source. Open WebUI has no licence declared in this registry, and BotSharp is licensed under Apache-2.0. Both are free to self-host.
What is the difference between Open WebUI and BotSharp?
Open WebUI is written in Python and BotSharp 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 BotSharp?
Choose Open WebUI if you want the larger community (152,426 stars) or its Custom / other licence terms. Choose BotSharp if its feature set, stack or Apache-2.0 licence fits better. Both are self-hostable.