head to head · open source
Open WebUI vs builderbot
Open WebUI has 152,426 GitHub stars, 22,301 forks, 294 open issues and last shipped yesterday. builderbot has 2,968 stars, 951 forks, 19 open issues and last shipped 15 days ago. Open WebUI leads on adoption by 5,036% (152,426 vs 2,968 stars). Open WebUI is written in Python under a custom or non-standard licence; builderbot is written in TypeScript under MIT. Open WebUI has attracted 15% as many forks as stars, builderbot 32%. 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 (openai), 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 | builderbot | |
|---|---|---|
| GitHub stars | ★ 152K | ★ 3.0K |
| License | Custom / other | MIT |
| Written in | Python | TypeScript |
| Last push | 2026-09-18 | 2026-09-04 |
| Forks | ⑂ 22K | ⑂ 951 |
| 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 builderbot if
- You want the builderbot feature set and don't need the biggest community
- You prefer the MIT license terms
- Your stack matches TypeScript
- You evaluated both and builderbot 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 builderbot
BuilderBot is an MIT licensed TypeScript library for building automated WhatsApp conversation flows that stay agnostic to the underlying WhatsApp provider, aimed at developers and teams that want to script their own chatbot logic instead of renting a hosted conversational platform.
read the full builderbot overview →
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Frequently asked questions
Is Open WebUI or builderbot more popular?
Open WebUI has 152,426 GitHub stars and builderbot has 2,968. Open WebUI has the larger community by that measure.
Are Open WebUI and builderbot free?
Both are open source. Open WebUI has no licence declared in this registry, and builderbot is licensed under MIT. Both are free to self-host.
What is the difference between Open WebUI and builderbot?
Open WebUI is written in Python and builderbot 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 builderbot?
Choose Open WebUI if you want the larger community (152,426 stars) or its Custom / other licence terms. Choose builderbot if its feature set, stack or MIT licence fits better. Both are self-hostable.