SilentSuite is an end-to-end encrypted sync service for your calendar, contacts, and tasks, where the server stores only ciphertext and cannot read a single event, name, or plan. Encryption happens on your devices with keys derived locally, so record contents are sealed before upload and opened only on another trusted device of yours. Manage everything in the web app, sync a phone through the Android adapter's system calendar, contacts, and task providers, or connect desktop apps like Thunderbird and GNOME Calendar through the local Bridge. The Bridge speaks CalDAV and CardDAV only on localhost, then forwards encrypted records upstream, so standard desktop clients work without ever exposing plaintext to the server. Import and export keep exit paths open, and because sync rides the open Etebase protocol, your data model stays inspectable rather than locked into a proprietary format. Self-hosting unlocks every feature at no cost: one Compose file starts the sync server and PostgreSQL, with open registration you can close after your own account exists, nightly backup tooling, and Umbrel packaging. Signing up hosted users is not required at all; the same web app, Android adapter, and Bridge run against your own server with your domain. Running on a dedicated VPS on RepoCloud with guaranteed CPU, RAM, and SSD, full root SSH access, and a browser serial console. AGPL-3.0 licensed.