Most of TOR nodes are owned by the CIA/NSA

There are also rumors of Signal being operated by them too

https://english.almayadeen.net/articles/analysis/signal-faci...

Whoever claims total anonymity in the US is full of crap

https://www.engadget.com/authorities-reportedly-ordered-goog...

All it takes is one backdoor or one engineered flaw

https://www.bleepingcomputer.com/news/security/signal-downpl...

Likewise, whoever promotes that kind of messaging tool overseas is complicit