Best OpenSource Claude Cowork alternative?

A user is seeking an open-source alternative to Claude Cowork for project work and document management. Key requirements include integrations with services like Notion and Gmail, and tools such as web search and PDF creation. The user plans to host LLMs on their own server, necessitating compatibility with platforms like Ollama and Ninfer. They have explored options like Eigent, OpenClaw, Hermes, and OpenWebUI Chat Interface, but are still looking for a suitable application that mirrors Claude Cowork's functionality.