Alf.io vs Tasks.org CalDAV Sync
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?
Alf.io
Ticket reservation system
VS
Tasks.org CalDAV Sync
Open-source calendar and task sync client for Android
| Feature | Alf.io | Tasks.org CalDAV Sync |
|---|---|---|
| Category | Calendar & Contacts | Calendar & Contacts |
| License | GPL-3.0 | GPL-3.0 |
| Language | Java | Kotlin |
| Setup difficulty | Medium | Easy |
| Min. RAM | 512 MB | 128 MB |
| Deployment | bare-metal | binary, source |
| GitHub stars | ★ 1,601 | ★ 2,784 |
| First released | 2025 | 2013 |
| Replaces | — | Google Calendar Sync, iCloud sync |
Why pick each one
Choose Alf.io if…
- Released under the GPL-3.0 license
- Active community (1.6k GitHub stars)
- Written in Java
- Lightweight — runs in 512 MB RAM
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
Frequently asked questions
Is Alf.io or Tasks.org CalDAV Sync better?
Tasks.org CalDAV Sync is the stronger all-round pick: it has both the larger community and the simpler easy setup. Consider Alf.io if its specific feature set fits your needs better.
Are Alf.io and Tasks.org CalDAV Sync free and open-source?
Yes. Alf.io is licensed under GPL-3.0 and Tasks.org CalDAV Sync under GPL-3.0. Both can be self-hosted at no software cost.
Can I run Alf.io and Tasks.org CalDAV Sync with Docker?
Alf.io: check the project docs for container support. Tasks.org CalDAV Sync: check the project docs for container support.