Onyx vs Open WebUI
Comparing two open source alternatives to ChatGPT and Claude . Use the comparison below to decide which one fits your needs.
Onyx
Open-source AI chat and enterprise search platform with RAG that works with every LLM.
Side-by-side comparison
| Onyx |  Open WebUI | |
|---|---|---|
| License | — | — |
| Self-hostable | Yes | Yes |
| GitHub Stars | 29,498 | 137,917 |
| Forks | 3,994 | 19,721 |
| Open Issues | 363 | 263 |
| Last Commit | May 19, 2026 | May 19, 2026 |
| First Released | Apr 27, 2023 | Oct 6, 2023 |
| Categories | ||
| Tags | — |
Similar open source alternatives
Ollama
Get up and running with Llama 3.3, DeepSeek-R1, Phi-4, Gemma 3, Mistral Small 3.1 and other large language models.
Alternative to: 
ChatGPT
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Lobe Chat
🤯 Lobe Chat - an open-source, modern design AI chat framework. Supports multiple AI providers (OpenAI / Claude 4 / Gemini / DeepSeek / Ollama / Qwen), Knowledge Base (file upload / RAG ), one click install MCP Marketplace and Artifacts / Thinking. One-click FREE deployment of your private AI Agent application.
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