khal
Calendar & ContactsCommand-line calendar built on CalDAV
Replaces Google Calendar
Best Lightweight Calendar & Contacts for self-hosting
The 10 best Lightweight calendar & contacts you can self-host, ranked by community traction.
vdirsyncer
Calendar & ContactsSynchronize calendars and contacts via CalDAV/CardDAV
Replaces iCloud sync
calcurse
Calendar & ContactsText-based calendar and scheduling application
Replaces Google Calendar
AgenDAV
Calendar & ContactsCalDAV web client with an Ajax interface
Replaces Google Calendar
Xandikos
Calendar & ContactsGit-backed CalDAV and CardDAV server
Replaces Google Calendar, iCloud
Framadate
Calendar & ContactsOnline polling and meeting scheduling tool
Replaces Doodle
Crab Fit
Calendar & ContactsOpen-source group availability finder for scheduling meetings
Replaces When2meet, Doodle
EteSync DAV
Calendar & ContactsLocal CalDAV bridge for EteSync encrypted accounts
Replaces iCloud Calendar
InfCloud
Calendar & ContactsWeb client for CalDAV and CardDAV servers
Replaces Google Calendar web
Horde Kronolith
Calendar & ContactsCalendar application from the Horde groupware suite
Replaces Google Calendar, Exchange
No apps match these filters.
At a glance
| App | Deploy effort | Difficulty | Min. RAM | License | ★ Stars |
|---|---|---|---|---|---|
| khal | Read-the-docs project | Medium | 64 MB | MIT | 3,073 |
| vdirsyncer | Read-the-docs project | Medium | 64 MB | BSD-3-Clause | 1,888 |
| calcurse | Read-the-docs project | Easy | 16 MB | BSD-2-Clause | 1,308 |
| AgenDAV | Under-an-hour setup | Medium | 128 MB | GPL-3.0 | 831 |
| Xandikos | Under-an-hour setup | Medium | 64 MB | GPL-3.0 | 609 |
| Framadate | Under-an-hour setup | Easy | 128 MB | CECILL-B | 600 |
| Crab Fit | Under-an-hour setup | Easy | 256 MB | MIT | 532 |
| EteSync DAV | Read-the-docs project | Medium | 128 MB | GPL-3.0 | 331 |
| InfCloud | Read-the-docs project | Easy | 32 MB | GPL-3.0 | 89 |
| Horde Kronolith | Read-the-docs project | Hard | 256 MB | GPL-2.0 | 10 |
Quick picks
- Most adopted: khal (3,073 GitHub stars).
- Lightest footprint: calcurse (from 16 MB RAM, against 256 MB for the heaviest here).
- Licensing: 4 of 10 use GPL-3.0; check the rest individually if you plan to modify and redistribute.
Every option here is open-source and self-hostable, tagged Lightweight within the calendar & contacts category. Deploy effort is graded from published container recipes, not vendor claims — see the methodology.