RippleMessenger – A Blockchain-Based Messenger
Local-first privacy messaging, but blockchain overhead adds complexity without solving messaging problems.

Dead drops with onion routing distinguish this from standard P2P messengers like Session.
Privacy advocates, journalists, activists
Session · Briar · Matrix
Local-first privacy messaging, but blockchain overhead adds complexity without solving messaging problems.
Serverless P2P messenger with deterministic rendezvous—no coordination infrastructure needed at all.
WebRTC P2P file drop with no backend; but privacy UX is crowded (SnapDrop, OnionShare).
Combines Signal's PQXDH with Session's no-phone approach, but iOS-only beta limits reach.
Offline encryption vault for one-off secrets without accounts, servers, or GPG.
LocalSend already does P2P file transfer without servers, but this one's open source.