khal 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?
khal
Command-line calendar built on CalDAV
VS
vdirsyncer
Synchronize calendars and contacts via CalDAV/CardDAV
| Feature | khal | vdirsyncer |
|---|---|---|
| Category | Calendar & Contacts | Calendar & Contacts |
| License | MIT | BSD-3-Clause |
| Language | Python | Python |
| Setup difficulty | Medium | Medium |
| Min. RAM | 64 MB | 64 MB |
| Deployment | binary, source | binary, source |
| GitHub stars | ★ 3,039 | ★ 1,859 |
| First released | 2013 | 2014 |
| Replaces | Google Calendar | iCloud sync |
Why pick each one
Choose khal if…
- Released under the MIT license
- Active community (3k GitHub stars)
- Written in Python
- Tiny footprint — runs in 64 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 khal or vdirsyncer better?
Neither is universally better. khal has the larger community; both share a medium setup difficulty, so the decision comes down to features and licensing.
Are khal and vdirsyncer free and open-source?
Yes. khal is licensed under MIT and vdirsyncer under BSD-3-Clause. Both can be self-hosted at no software cost.
Can I run khal and vdirsyncer with Docker?
khal: check the project docs for container support. vdirsyncer: check the project docs for container support.