I’ve been working really hard to research and rank messaging apps by their privacy. The more green boxes the better.
I plan to turn PrivacySpreadsheet.com into a place for privacy data on everything from cars to video games. It’s all open source too on GitHub.
Not trying to advertise, I just put a lot of time into researching all this, and I want to share it since I think others could benefit.
The is the messenger matrix from the German blog Kukitz-Blog (it is a blog with a strong focus on privacy and is in my opinion well informed). But no worries, the matrix is also available in English.
Maybe you can take some inspiration from the matrix.