EteSync vs Horde Kronolith
A side-by-side comparison of two self-hosted calendar & contacts options — licensing, setup difficulty, resource needs, and what each one replaces.
Not the right match-up?
EteSync
End-to-end encrypted sync for contacts and calendars
VS
Horde Kronolith
Calendar application from the Horde groupware suite
| Feature | EteSync | Horde Kronolith |
|---|---|---|
| Category | Calendar & Contacts | Calendar & Contacts |
| License | AGPL-3.0 | GPL-2.0 |
| Language | Python | PHP |
| Setup difficulty | Medium | Hard |
| Min. RAM | 256 MB | 256 MB |
| Deployment | docker, bare-metal | bare-metal |
| GitHub stars | ★ 1,765 | ★ 10 |
| First released | 2017 | 2003 |
| Replaces | Google Calendar, iCloud | Google Calendar, Exchange |
Why pick each one
Choose EteSync if…
- Released under the AGPL-3.0 license
- First-class Docker support for quick deployment
- Active community (1.8k GitHub stars)
- Written in Python
Choose Horde Kronolith if…
- Released under the GPL-2.0 license
- Written in PHP
- Tiny footprint — runs in 256 MB RAM
Frequently asked questions
Is EteSync or Horde Kronolith better?
EteSync is the stronger all-round pick: it has both the larger community and the simpler medium setup. Consider Horde Kronolith if its specific feature set fits your needs better.
Are EteSync and Horde Kronolith free and open-source?
Yes. EteSync is licensed under AGPL-3.0 and Horde Kronolith under GPL-2.0. Both can be self-hosted at no software cost.
Can I run EteSync and Horde Kronolith with Docker?
EteSync: yes. Horde Kronolith: check the project docs for container support.