Iris.to

Iris is like the social networking apps we're used to, but better.

Accessible. No phone number or signup required. Just type in your name or alias and go! Secure. It's open source. You can verify that your data stays safe. Always available. It works offline-first and is not dependent on any single centrally managed server. Users can even connect directly to each other.

In other words, you can't be deplatformed from Iris.