This (and many other reasons) is why I have proudly used @signalapp (TextSecure) for over a decade and have gotten all of my friends and family on it. 99% of my daily conversations happen over Signal. No other option really compares in the E2EE messenger market.

https://arstechnica.com/security/2025/10/why-signals-post-quantum-makeover-is-an-amazing-engineering-achievement/