Jan's probably the closest thing to a open-source LLM chat interface that is relatively easy to get started with.
I personally prefer Librechat (which supports integration with image generation) but it does have to spin up some docker stuff and that can make it a bit more complicated.
There is also Msty (https://msty.app), which I find much easier to get started with and it comes with interesting features such as web search, RAG, Delve mode, etc.
https://github.com/janhq/jan
https://github.com/danny-avila/LibreChat
Jan's probably the closest thing to a open-source LLM chat interface that is relatively easy to get started with.
I personally prefer Librechat (which supports integration with image generation) but it does have to spin up some docker stuff and that can make it a bit more complicated.