Tasks.org CalDAV Sync 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?
Tasks.org CalDAV Sync
Open-source calendar and task sync client for Android
VS
vdirsyncer
Synchronize calendars and contacts via CalDAV/CardDAV
| Feature | Tasks.org CalDAV Sync | vdirsyncer |
|---|---|---|
| Category | Calendar & Contacts | Calendar & Contacts |
| License | GPL-3.0 | BSD-3-Clause |
| Language | Kotlin | Python |
| Setup difficulty | Easy | Medium |
| Min. RAM | 128 MB | 64 MB |
| Deployment | binary, source | binary, source |
| GitHub stars | ★ 2,784 | ★ 1,859 |
| First released | 2013 | 2014 |
| Replaces | Google Calendar Sync, iCloud sync | iCloud sync |
Why pick each one
Choose Tasks.org CalDAV Sync if…
- Released under the GPL-3.0 license
- Easy to set up — beginner-friendly
- Active community (2.8k GitHub stars)
- Written in Kotlin
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 Tasks.org CalDAV Sync or vdirsyncer better?
Tasks.org CalDAV Sync is the stronger all-round pick: it has both the larger community and the simpler easy setup. Consider vdirsyncer if its specific feature set fits your needs better.
Are Tasks.org CalDAV Sync and vdirsyncer free and open-source?
Yes. Tasks.org CalDAV Sync is licensed under GPL-3.0 and vdirsyncer under BSD-3-Clause. Both can be self-hosted at no software cost.
Can I run Tasks.org CalDAV Sync and vdirsyncer with Docker?
Tasks.org CalDAV Sync: check the project docs for container support. vdirsyncer: check the project docs for container support.