Get a physical SIM phone number. All your messages are encrypted with your personal private key using industry standard 256-bit asymmetric encryption. Send and receive messages. Receiving is free as long as you have a number. Sending is paid using a pay-as-you-go pricing.
Just tried, UX is perfect, smooth website, onion URL + xmr paiement : Perfect, i wait to use it but for now it's 5/5 so far !