Today, I’m talking to Jay Graber, the CEO of Bluesky Social, which is a decentralized competitor to Twitter, er, X. Bluesky actually started inside of what was then known as Twitter — it was a project from then-CEO Jack Dorsey, who spent his days wandering the earth and saying things like Twitter should be a protocol and not a company. Bluesky was supposed to be that protocol, but Jack spun it out of Twitter in 2021, just before Elon Musk bought the company and renamed it X.
The TOR network is indeed the most widely-used implementation of onion routing, but it isn’t the only example.
My go-to reference is Retroshare, an open-source app that implements onion routing on top of an encrypted friend-to-friend network:
http://retroshare.cc/
You only connect to your trusted friends, but by passing messages along the Kevin Bacon chain it’s still possible to reach practically anyone on the network. Retroshare’s built-in services include email, instant messaging, traditional web forums, microblogging, and Reddit-style karma-ranked forums/linkboards, and third party plugins include voice and video chat. It’s desktop-only, but I think it demonstrates that serverless social networks are possible.