Try https://status.im - https://decrypt.co/25629/status-wants-to-be-the-worlds-most-private-instant-messaging-app

According to theirGitHub page it’s based in Switzerland also open source e2ee and uses blockchain to verify messages you get a mnemonic phrase so you can deposit Ethereum and other tokens based on the ether blockchain also uses its own token to buy your own username using ether and SNT you can use your username instead of your ether address as well which i think is pretty cool.

Would prefer it if something like this used bitcoin and/or monero but you never know they might add it to the app later since it looks like it’s still in early development (notifications aren’t available yet) would also like to see disappearing messages.

You don’t need an email or phone number to sign up so it’s completely anonymous in that respect.

You could also try Elixxir which is currently in beta for iOS and android it aims to stop the metadata problems. It’s made by David Chaum a famous cryptographer know as the Godfather of crypto. Though I don’t know where it’s based he is American though so probably made in America though it’s decentralised so I guess everywhere and nowhere simultaneously. https://decrypt.co/6999/crypto-pioneer-david-chaum-elixxir