GNOME Calendar vs vdirsyncer
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?
GNOME Calendar
Simple desktop calendar with CalDAV support
VS
vdirsyncer
Synchronize calendars and contacts via CalDAV/CardDAV
| Feature | GNOME Calendar | vdirsyncer |
|---|---|---|
| Category | Calendar & Contacts | Calendar & Contacts |
| License | GPL-3.0 | BSD-3-Clause |
| Language | C | Python |
| Setup difficulty | Easy | Medium |
| Min. RAM | 256 MB | 64 MB |
| Deployment | binary, source | binary, source |
| GitHub stars | ★ 300 | ★ 1,859 |
| First released | 2015 | 2014 |
| Replaces | Google Calendar | iCloud sync |
Why pick each one
Choose GNOME Calendar if…
- Released under the GPL-3.0 license
- Easy to set up — beginner-friendly
- Written in C
- Tiny footprint — runs in 256 MB RAM
Choose vdirsyncer if…
- Released under the BSD-3-Clause license
- Active community (1.9k GitHub stars)
- Written in Python
- Tiny footprint — runs in 64 MB RAM
Frequently asked questions
Is GNOME Calendar or vdirsyncer better?
Neither is universally better. vdirsyncer has the larger community, while GNOME Calendar is simpler to set up (easy difficulty). Choose based on the comparison table above and your own setup.
Are GNOME Calendar and vdirsyncer free and open-source?
Yes. GNOME Calendar is licensed under GPL-3.0 and vdirsyncer under BSD-3-Clause. Both can be self-hosted at no software cost.
Can I run GNOME Calendar and vdirsyncer with Docker?
GNOME Calendar: check the project docs for container support. vdirsyncer: check the project docs for container support.