The Signal messenger and protocol.

My bad... It wasn't supposed to sound that aggressive.

And to be honest: there is no confirmation for a free tier but I strongly believe (and hope) so because most people nowadays assume everything to be free and if they see Signal not having a free backup plan everyone would go

aAhHhHHHhH they are so greedy i thought they are a non-profit.

(I mean people who don't care about privacy and only use signal because their privay-aware friends told them to)