Features include: - Public-private key based identity (not bound to any blockchain or hosting domain) - Federated (accounts on different nodes can communicate) - Lightweight (server runs on a raspberry pi zero v1.3) - No server-side replication (direct communication between app and contact's node) - Low latency (use of websockets for push events to avoid polling) - Responsive (renders well in phone, tablet and PC) - Unlimited accounts per node (host for your whole family)