Not to add more to the mix, but I've been very happy with Librechat: https://github.com/danny-avila/LibreChat

LibreChat is also one of the few LLM chat interfaces that works with both external APIs (OpenAI, Anthropic, etc) and local ones (hosted via Ollama, etc) out of the box.

If it has a downside, I'd say its a little more involved to get setup, lots of docker containers, etc then a more batteries-included approach like Jan.

https://github.com/janhq/jan