head to head · open source
Open WebUI vs GPTCache
Open WebUI has 152,861 GitHub stars, 22,367 forks, 294 open issues and last shipped yesterday. GPTCache has 8,201 stars, 596 forks, 101 open issues and last shipped yesterday. Open WebUI leads on adoption by 1,764% (152,861 vs 8,201 stars). Open WebUI is written in Python under a custom or non-standard licence; GPTCache is written in Python under MIT. Open WebUI has attracted 15% as many forks as stars, GPTCache 7%. 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 (llm), 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 | GPTCache | |
|---|---|---|
| GitHub stars | ★ 153K | ★ 8.2K |
| License | Custom / other | MIT |
| Written in | Python | Python |
| Last push | 2026-09-22 | 2026-09-22 |
| Forks | ⑂ 22K | ⑂ 596 |
| Self-hosting | Yes | Yes |
| Data ownership | Your server | Your server |
pick Open WebUI if
- You weight community size — 153K 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 GPTCache if
- You want the GPTCache feature set and don't need the biggest community
- You prefer the MIT license terms
- Your stack matches Python
- You evaluated both and GPTCache 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 GPTCache
GPTCache is an MIT licensed Python library that builds a semantic cache for large language model queries, letting applications built on ChatGPT and other LLMs answer repeated or semantically similar prompts from a local cache instead of issuing a fresh, billable API call each time.
read the full GPTCache overview →
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Frequently asked questions
Is Open WebUI or GPTCache more popular?
Open WebUI has 152,861 GitHub stars and GPTCache has 8,201. Open WebUI has the larger community by that measure.
Are Open WebUI and GPTCache free?
Both are open source. Open WebUI has no licence declared in this registry, and GPTCache is licensed under MIT. Both are free to self-host.
What is the difference between Open WebUI and GPTCache?
Open WebUI is written in Python and GPTCache 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 GPTCache?
Choose Open WebUI if you want the larger community (152,861 stars) or its Custom / other licence terms. Choose GPTCache if its feature set, stack or MIT licence fits better. Both are self-hostable.