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EteSync

End-to-end encrypted sync for contacts and calendars

Calendar & Contacts ★ 1.8k stars Medium setup AGPL-3.0

EteSync is a secure, end-to-end encrypted, and journaled solution for syncing contacts, calendars, and tasks. Data is encrypted on the client so the server never sees plaintext.

Official siteSource code

Key features

  • End-to-end encryption
  • Journaled change history
  • Android and iOS apps

Strengths

  • Released under the AGPL-3.0 license
  • First-class Docker support for quick deployment
  • Active community (1.8k GitHub stars)
  • Written in Python

EteSync replaces

Self-hosted Google Calendar alternativesSelf-hosted iCloud alternatives

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