Thank you very much for pointing this out. This was exactly what the comparison table seemed to be "telling" me and what I read (indirectly) in a couple of articles.
Not sure about Telegram, as the operational server is in the UAE, and this has already caused some issues with foreign intelligence services, who did not seem to get the data they wanted, but authoritarian regimes are definitely no better.
There is, however, another Swiss and a French solution,...