head to head · open source
Open WebUI vs GPT4All
Open WebUI has 152,426 GitHub stars, 22,301 forks, 294 open issues and last shipped today. GPT4All has 77,401 stars, 8,291 forks, 771 open issues and last shipped 1.3 years ago. Open WebUI leads on adoption by 97% (152,426 vs 77,401 stars). Open WebUI is written in Python under a custom or non-standard licence; GPT4All is written in C++ under MIT. Open WebUI has attracted 15% as many forks as stars, GPT4All 11%. 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 | GPT4All | |
|---|---|---|
| GitHub stars | ★ 152K | ★ 77K |
| License | Custom / other | MIT |
| Written in | Python | C++ |
| Last push | 2026-09-18 | 2025-05-27 |
| Forks | ⑂ 22K | ⑂ 8.3K |
| 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 GPT4All if
- You want the GPT4All feature set and don't need the biggest community
- You prefer the MIT license terms
- Your stack matches C++
- You evaluated both and GPT4All 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 GPT4All
GPT4All is an MIT licensed C++ chat application and Python client from Nomic that runs large language models privately on everyday desktops and laptops, built for developers and teams who want local inference without API calls, GPUs, or sending data off device.
read the full GPT4All overview →
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Frequently asked questions
Is Open WebUI or GPT4All more popular?
Open WebUI has 152,426 GitHub stars and GPT4All has 77,401. Open WebUI has the larger community by that measure.
Are Open WebUI and GPT4All free?
Both are open source. Open WebUI has no licence declared in this registry, and GPT4All is licensed under MIT. Both are free to self-host.
What is the difference between Open WebUI and GPT4All?
Open WebUI is written in Python and GPT4All 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 GPT4All?
Choose Open WebUI if you want the larger community (152,426 stars) or its Custom / other licence terms. Choose GPT4All if its feature set, stack or MIT licence fits better. Both are self-hostable.