CalDavZAP

Free#159 of 193 in Calendar Apps

CalDavZAP: A browser-based CalDAV client for people who want direct control over calendar data. Ranked #159 of 193 in Calendar Apps by our editors (3.0/10); pricing: Free plan; best for self-hosters using CalDAV-compatible calendar servers.

3.0/10Editor score

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At a glance

Editor score
3.0 / 10
Pricing
Free plan
Best for
Self-hosters using CalDAV-compatible calendar servers
Free plan
Yes
Paid from
Free
Facts checked
23 Sep 2026

Where it wins
- Reads and edits events, tasks, alarms, and recurring events
- Supports delegated and subscribed calendars with background sync
- Integrates with servers including DAViCal, SabreDAV, and Radicale
Where it doesn't
- Runs in a browser only, with no mobile apps
- Does not provide scheduling links or video meeting support
- Requires a CalDAV server and is a focused client rather than a general calendar service

Our verdict on CalDavZAP

CalDavZAP is an open-source, JavaScript-based web client for accessing and managing calendars held on a CalDAV server. It suits individuals and small organizations who already have a compatible calendar service and want a browser interface for it. The client can detect read-only and read/write calendar collections, and it supports event and task management, alarms, recurring events, and time zones. Its scope is centered on the CalDAV ecosystem rather than serving as a standalone calendar service.

The feature set addresses everyday calendar work as well as shared-calendar cases: users can move and create events with drag and drop, search calendars, and work with delegated or subscribed calendars. Asynchronous background synchronization and two-way calendar sync support keeping the browser client aligned with the server. Time-range filtering is available when the server supports it. Integrations include DAViCal, OS X Server, Cyrus IMAP CalDAV, SabreDAV, Baïkal, Radicale, openCRX, and Oracle Communications Calendar Server, making compatibility with an existing server the key ecosystem consideration.

CalDavZAP is free and released under the GNU Affero General Public License version 3.0, with no paid tiers described. It runs on the web and requires a CalDAV server; a standard setup does not require special server software beyond that service. Email is the listed support channel. The product is not a fit for people who need mobile apps, scheduling links, or video meeting support as part of their calendar workflow. The official product page lists version 0.13.1, dated 2015-09-22, as its latest stable release, so buyers weighing ongoing development should consider that signal. Choose CalDavZAP for a browser-based interface to a compatible CalDAV setup, not as a broad replacement for consumer calendar suites.

Questions about CalDavZAP

What does CalDavZAP run on? Web. It runs in the cloud.

What does CalDavZAP integrate with? 8 integrations, including DAViCal, OS X Server, Cyrus IMAP CalDAV, SabreDAV and Baïkal.

Who is CalDavZAP built for? Solo users and small businesses (our editorial estimate).

Your product? Our editors can test CalDavZAP in depth and publish a review, labelled as paid · from $149/mo →

CalDavZAP pricing

Plans Free planFree Free to use — no paid tier required for the core job.

See plans on inf-it.com

CalDavZAP fact sheet

Free plan	Yes
Paid from	Free
Shared calendars	Yes
Time blocking	Not verified
Scheduling links	No
Calendar sync	Two_way
Mobile apps	None
Video meeting support	No
Deployment	Cloud
Platforms	Web
Support	Email
Built for	Solo, Small business (editorial estimate)
Integrations	8 integrations: DAViCal, OS X Server, Cyrus IMAP CalDAV, SabreDAV, Baïkal, Radicale …
Pricing	Free plan
Website	inf-it.com
Facts checked	23 Sep 2026

CalDavZAP integrations

CalDavZAP lists 8 integrations on its own site.

DAViCal
OS X Server
Cyrus IMAP CalDAV
SabreDAV
Baïkal
Radicale
openCRX
Oracle Communications Calendar Server

Alternatives to CalDavZAP

See all CalDavZAP alternatives →

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Reviewed by iTechGuides Editors · Editorial team · Updated Nov 2026

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Last updated 14 Nov 2026 · How we research and update