Matrix? No, thanks. — Hackea documentació

The article alleges that Matrix:

• has links to Israeli intelligence.
• sends a lot of sensitive data to matrix.org servers, even when Synapse is self-hosted.

Is this information accurate?

To be clear, I'm not saying Matrix is bad. I'm still using it. I just want to know more about it and who's running the show, and hear other people's opinions and arguments. Thanks for all the insightful comments.