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 Databag is a self-hosted messaging service. Notable features include:
 - Public-private key based identity (not bound to any blockchain or hosting domain)
 - Federated (accounts on different nodes can communicate)
+- Topic based threads (messages grouped by topic not contacts)
 - Lightweight (server runs on a raspberry pi zero v1.3)
 - Decentralized (direct communication between app and contact's node)
 - Low latency (use of websockets for push events to avoid polling)