head to head · open source
Open WebUI vs Corpus
Open WebUI has 152,394 GitHub stars, 22,296 forks, 294 open issues and last shipped yesterday. Corpus has 13 stars, 0 forks, 25 open issues and last shipped 3 months ago. Open WebUI leads on adoption by 1,172,162% (152,394 vs 13 stars). Open WebUI is written in Python under a custom or non-standard licence; Corpus is written in Python under AGPL-3.0. Open WebUI has attracted 15% as many forks as stars, Corpus 0%. 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 | Corpus | |
|---|---|---|
| GitHub stars | ★ 152K | ★ 13 |
| License | Custom / other | AGPL-3.0 |
| Written in | Python | Python |
| Last push | 2026-09-17 | 2026-06-26 |
| Forks | ⑂ 22K | ⑂ 0 |
| 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 Corpus if
- You want the Corpus feature set and don't need the biggest community
- You prefer the AGPL-3.0 license terms
- Your stack matches Python
- You evaluated both and Corpus 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 Corpus
Corpus is an open source, self hosted document Q&A system that ingests PDFs and web pages, answers natural language questions with citations back to source text, and is aimed at teams and individuals who need grounded answers across a private document collection rather than across the public web.
read the full Corpus overview →
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Frequently asked questions
Is Open WebUI or Corpus more popular?
Open WebUI has 152,394 GitHub stars and Corpus has 13. Open WebUI has the larger community by that measure.
Are Open WebUI and Corpus free?
Both are open source. Open WebUI has no licence declared in this registry, and Corpus is licensed under AGPL-3.0. Both are free to self-host.
What is the difference between Open WebUI and Corpus?
Open WebUI is written in Python and Corpus in Python. 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 Corpus?
Choose Open WebUI if you want the larger community (152,394 stars) or its Custom / other licence terms. Choose Corpus if its feature set, stack or AGPL-3.0 licence fits better. Both are self-hostable.