Also would like to just commend your efforts to prepare the pitch and poster here.

For a Swiss sovereign solution, you can try Apertus, in particular the RAG API from Public AI that I showed you. Think about the safety and scaling issues that your solution will depend on, but don't let technical questions slow you down. This challenge is a huge chance to help in such an important area - your contributions will be valuable no matter what approach that you take. I wish you much success with this. Viel Glück!

Top of mind: check out Legal Lens which started at a hackathon in 2024. There are many RAG systems, like PrivateGPT or products like Euria that could help you get started. ZüriCityGPT is based on municipal legal documents: see writeups here and here.