Zapier copies an event. It does not keep two calendars honest.
Zapier is excellent at connecting apps. A calendar sync is not an app connection, it is a promise: change it here, and it changes there, once, without loops or ghosts. With Zapier you build that promise yourself, Zap by Zap, and you pay for every run. AddSync Calendar is that promise as a product.
Where the two really differ
Three things that decide whether it works for a company.
Built for different jobs
Zapier is a general automation tool. AddSync Calendar does one thing, calendar, contact and task sync between mail and calendar systems.
Systems
AddSync connects Exchange Server 2016, 2019 and SE, Microsoft 365, Outlook.com, Google, iCloud, HCL Domino, Zoom and CalDAV or WebDAV servers, and any of them can be paired with any other.
Price you can predict
Zapier plans are priced by task volume, and a busy calendar produces many tasks. AddSync is priced per account. Basic $3, Silver $5, Gold $8 per account a month, billed yearly ($4, $6 and $10 billed monthly).
Side by side
How the two approaches compare. Zapier facts checked in October 2026.
Who should pick which
It depends on what you run.
AddSync Calendar fits if you
- want two calendars to stay identical without maintaining Zaps.
- run Exchange Server or HCL Domino.
- need a price that does not grow with every meeting.
- want an administrator to add and remove people in one place.
Zapier fits if you
- want a calendar event to start a bigger workflow, such as a CRM entry or a message.
- already run Zapier for other processes.
- need a one-off copy, not a lasting sync.
- work only with cloud apps Zapier already supports.
Switching is four steps
Connect
Add Exchange, Microsoft 365, Google, iCloud, Domino or a CalDAV server.
Add people
One by one or from a list. They get an email invite and sign in once.
Choose direction
Per source: one way, the other way, or both ways.
Switch the old one off
Check a week of events, then cancel the old tool.
Questions
Can Zapier sync two calendars?
It can copy events when something happens. A lasting two-way sync means building and maintaining several Zaps, including how edits and deletions travel. AddSync Calendar does this as a product.
Can I use both?
Yes. Keep the calendars in step with AddSync, and let Zapier react to events for other workflows.
Where do the Zapier facts come from?
From Zapier's public product descriptions, checked in October 2026. Plans change, so confirm before you decide.
Is there a free trial?
Yes, 14 days.
How is AddSync Calendar priced?
Per account. Basic $3, Silver $5, Gold $8 per account a month, billed yearly ($4, $6 and $10 billed monthly). See the pricing page.
Can I choose which way the data flows?
Yes. For each source you choose one way, the other way, or both ways.
Test it on your own calendars.
Start the 14-day trial, or tell us which systems you run and we will tell you what the sync covers, and what it does not.
