Families and small communities run their own messenger with Databag, where accounts live on a little home server and chats never pass through a platform company. Conversations live in topics instead of contact threads, so the ski trip, the shopping list, and the school parents each keep their own stream with unlimited participants. Seal a topic and end-to-end encryption means even you, the admin, cannot read it on the server. Friends on other Databag nodes join the same topics because accounts federate across servers, and identity comes from a public-private key pair rather than a phone number or a rented domain. Photos, videos, and files ride along in the thread, audio and video calls connect from the mobile and browser apps, and push alerts arrive through UnifiedPush, FCM, or APN when something new lands. The whole node sips resources, happily running on a Raspberry Pi class machine, and websockets deliver messages with low latency instead of polling. Host unlimited accounts for the whole household, protect sign-in with TOTP multi-factor authentication, and manage everything from apps on iOS, Android, F-Droid, or any browser. Running on a dedicated VPS on RepoCloud with guaranteed CPU, RAM, and SSD, full root SSH access, and a browser serial console. Apache-2.0 licensed.