SHSelfHostIndex

Alf.io vs Decsync Calendar 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?
AL Alf.io Ticket reservation system VS DE Decsync Calendar Sync File-based calendar and contacts synchronization
FeatureAlf.ioDecsync Calendar Sync
CategoryCalendar & ContactsCalendar & Contacts
LicenseGPL-3.0GPL-3.0
LanguageJavaKotlin
Setup difficultyMediumMedium
Min. RAM512 MB128 MB
Deploymentbare-metalsource, binary
GitHub stars★ 1,601★ 696
First released20252018
Replaces—Google Calendar

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
Alf.io details

Choose Decsync Calendar Sync if…

  • Server-free architecture
  • Privacy friendly
Decsync Calendar Sync details

Frequently asked questions

Is Alf.io or Decsync Calendar Sync better?

Neither is universally better. Alf.io has the larger community; both share a medium setup difficulty, so the decision comes down to features and licensing.

Are Alf.io and Decsync Calendar Sync free and open-source?

Yes. Alf.io is licensed under GPL-3.0 and Decsync Calendar Sync under GPL-3.0. Both can be self-hosted at no software cost.

Can I run Alf.io and Decsync Calendar Sync with Docker?

Alf.io: check the project docs for container support. Decsync Calendar Sync: check the project docs for container support.

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