Ollama vs Open WebUI
Comparing two open source alternatives to ChatGPT and Deepseek and Claude. Use the comparison below to decide which one fits your needs.

Ollama
MITGet up and running with Llama 3.3, DeepSeek-R1, Phi-4, Gemma 3, Mistral Small 3.1 and other large language models.
Side-by-side comparison
GitHub stars over time
GitHub stars over time
Similar open source alternatives

Lobe Chat
Open-source AI chat and agent platform with multi-provider support, RAG, plugins, and an agent marketplace — self-hostable ChatGPT alternative.

Onyx
Onyx is an open-source AI chat and enterprise search platform with RAG that works with every LLM. Bring your own model, connect your tools, and unify all your team's knowledge.
Glean
Hob
Free, MIT-licensed desktop AI assistant that runs open-weight models like Gemma and gpt-oss locally on Mac, Windows, and Linux.

Pi
Minimal, extensible open-source coding agent CLI with a multi-provider LLM API, packages, MCP support, and a TypeScript SDK.
