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The calendar-sync alternative to Zapier
Updated 2 June 2026 · LeapSync team
Short answer: Zapier can copy calendar events, but it's a general automation tool, not a sync engine. It polls on a schedule (so changes lag minutes), charges per task (two-way sync doubles the cost), breaks on recurring events, and is easy to turn into a duplicate loop. For real-time, two-way Google ↔ Outlook sync that handles recurring events and never double-creates, use a purpose-built tool like LeapSync — flat from $4/month, set up in two minutes, nothing to build or babysit.
Why Zapier isn't built for calendar sync
- It polls, it doesn't push. Zaps check for changes on a schedule — often every 1–15 minutes depending on your plan — so an event you add in one calendar takes minutes to appear in the other. A webhook-based sync tool reacts in seconds.
- Per-task pricing adds up fast. Every event created or updated is a billable task. Run it two-way and you roughly double the tasks; a busy calendar can blow through a monthly quota quickly.
- Recurring events break. Single events are fine, but recurring series — and the one-off exceptions within them — are a well-known weak spot for DIY automations, leading to missing or mismatched occurrences.
- Duplicate loops. Point two Zaps at each other for two-way sync and every event can echo back and forth forever, because there's no built-in tracking of which copy mirrors which original.
- You build and maintain it. You design the Zaps, map the fields, and fix them when they break. A dedicated tool owns that relationship for you.
Zapier vs. a dedicated sync tool
| Method | Direction | Speed | Recurring events | Cost |
|---|---|---|---|---|
| Zapier (DIY Zaps) | One- or two-way | 1–15 min (polling) | Often breaks | Per-task fees |
| Dedicated sync tool (LeapSync) | Two-way | Under ~5 seconds | Handled, incl. exceptions | Flat from $4/mo |
How LeapSync is different
LeapSync is built only for calendar sync, so it does the things a generic automation can't: it's push-based (changes propagate in under ~5 seconds via Google and Microsoft webhooks, plus an hourly safety sweep), it tracks which mirrored event matches which original so edits update the existing copy instead of creating duplicates, and it handles recurring series and their exceptions. Pricing is flat — no per-task math — and you also get a private read-only Apple/ICS feed for your iPhone. It's privacy-first: LeapSync doesn't store your event titles, descriptions, or attendees, and tokens are encrypted at rest (AES-256-GCM).
How to switch from a Zapier calendar sync
- Turn off your calendar Zaps so they stop creating new copies.
- Clear any duplicates they already made — once.
- Create a free LeapSync account at app.leapsync.app/signup and connect Google and Microsoft (calendar read/write only — never email, contacts, or files).
- Pick the direction — two-way, or one-way — and let LeapSync own the sync from there.
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Comparing other options? See how to sync Google Calendar with Outlook, how to sync Outlook to Google, or the best calendar sync tools.
Frequently asked questions
- Can Zapier sync Google Calendar and Outlook two-way?
- You can build it with two Zaps, but it polls (1–15 minute delays), charges per task, and is prone to duplicate loops and recurring-event errors. A purpose-built tool like LeapSync does real-time two-way sync from $4/month.
- Why are my Zapier calendar events delayed?
- Zapier checks for changes on a schedule rather than reacting instantly — typically every 1–15 minutes depending on your plan. Webhook-based tools like LeapSync push changes through in under ~5 seconds.
- Is LeapSync cheaper than Zapier for calendar sync?
- For ongoing two-way sync, usually yes. Zapier bills per task, so every event create/update counts and two-way doubles it. LeapSync is flat from $4/month regardless of how many events sync.
- Will switching from Zapier create duplicate events?
- No. LeapSync tracks which mirror matches which original, so edits update the existing copy instead of creating new ones. Clear any duplicates your Zaps already made once, then let LeapSync own the sync.
- Does LeapSync handle recurring events?
- Yes, including the one-off exceptions within a recurring series — a common failure point for DIY Zapier sync.