Odysseus vs Open WebUI
Updated June 2026
Both are open-source, self-hosted AI interfaces under MIT license. They serve different goals: Open WebUI is a polished chat interface for LLMs. Odysseus tries to be a full workspace combining chat, email, calendar, research, and agents.
| Feature | Odysseus | Open WebUI |
|---|---|---|
| Multi-turn Chat | Yes | Yes |
| Multi-model Support | Yes | Yes |
| Autonomous Agents | Yes | Partial |
| Deep Research | Yes | No |
| Email Integration | Yes | No |
| Calendar & Tasks | Yes | No |
| Document Editor | Yes | No |
| Persistent Memory | Yes | Yes |
| MCP Protocol | Yes | Yes |
| Plugin Ecosystem | No | Yes |
| Multi-user & RBAC | No | Yes |
| Mobile PWA | Yes | Yes |
| RAG / Document Upload | Yes | Yes |
| Community Size | 34k stars | 136k stars |
| Maturity | Days old | Years |
Choose Odysseus if...
You want an all-in-one workspace (chat + email + calendar + research + agents), you're comfortable being an early adopter, and you have the hardware to support it.
Choose Open WebUI if...
You want a stable, well-tested chat interface for LLMs with a large plugin ecosystem and multi-user support. If "just works" matters more than feature breadth, Open WebUI is the safer choice today.