GCalSync keeps Google talking to Google. CalendarPipe speaks more than Google.
GCalSync does one job well: mirror events between Google calendars, with full details or busy-only privacy. CalendarPipe covers Google plus Outlook and Apple, and lets you program what syncs — not just which calendar shares into which.
- Free forever plan
- 14-day Pro trial
- No credit card to start
- 2 min setup
Where GCalSync falls short
GCalSynchas strengths, but here's what users run into.
Google only — Outlook and Apple are roadmap
GCalSync is Google↔Google. Their FAQ lists Outlook and Apple Calendar as future work. If your work calendar is Outlook or your personal calendar is iCloud, you need another tool today.
Mirroring, not programmable logic
You pick source and destination calendars and choose full details vs busy blocks. You cannot write conditional filters, transform titles with code, or route events based on attendees or keywords.
Cross-account sync is the paid cliff
Calendars under one Google login stay free. Each additional Google account is $2/month. That is simple pricing — until your work and personal lives live in different Google accounts and the meter starts.
No API or agent integrations
GCalSync is a focused consumer product. There is no REST API or MCP server for automations and AI agents.
Why teams switch to CalendarPipe
Beyond Google
Sync Google, Outlook, and Apple Calendar in one place. GCalSync’s multi-provider support is still on the roadmap.
Rules that go past busy vs full
Keep privacy controls — and add keyword filters, title transforms, weekend skips, and custom JavaScript when you need them.
One Pro price for unlimited rules
CalendarPipe Pro is a flat $4/month for unlimited calendars and sync rules. You are not charged per extra Google account.
Built for developers and agents
Use the REST API and MCP server when sync needs to plug into scripts, workflows, or AI agents.
Feature comparison
CalendarPipe vs GCalSync — side by side.
| Feature | CalendarPipe | GCalSync |
|---|---|---|
| Google Calendar | Yes | Yes |
| Outlook / Microsoft 365 | Yes | No |
| Apple Calendar / iCloud | Yes | No |
| ICS / internet calendar feeds | Yes | No |
| Programmable sync rules (JavaScript) | Yes | No |
| Event filtering & transformation | Full (JS sandbox) | Full details or Busy |
| Busy-only / privacy mode | Yes | Yes |
| Invitation-based delivery | Yes | No |
| REST API | Yes | No |
| MCP server for AI agents | Yes | No |
| Free plan | Forever (2 calendars, 1 rule) | Forever (one Google account) |
Pricing, side by side
What you pay — and what each plan actually gets you.
GCalSync
Free
Unlimited calendars inside one Google account
Extra accounts
Per additional Google account · 7-day Pro trial
Google Calendar only. Outlook / Apple listed as roadmap. Pricing as of August 2026.
CalendarPipe
Free
2 calendars · 1 sync rule · free forever
Pro
Unlimited calendars & rules · $3.33/mo billed annually
Free forever, or a 14-day Pro trial.
GCalSync is free inside one Google account. CalendarPipe is free to start across providers, and $4/month when you need unlimited programmable sync.
When GCalSync is the better choice
We'd rather you pick the right tool than the one we sell.
All your calendars live in one Google account
GCalSync is free forever for unlimited calendars inside a single Google login. If everything sits under one account and you only need full-detail or busy-block mirroring, nothing CalendarPipe charges for beats free.
You just need a second Google account, nothing more
GCalSync charges $2/month per additional Google account — less than CalendarPipe Pro at $4/month. If you will never add Outlook, Apple, ICS feeds, or a rule more complex than "full details or busy", the cheaper meter wins.
Switching from GCalSync is low-risk
There's no data to move and no hard cutover. Run CalendarPipe alongside GCalSync, then switch over only once you're ready.
- 1
Run both briefly
Stand up CalendarPipe alongside GCalSync, confirm the mirrored events look right, then disable the overlapping GCalSync mirrors.
- 2
Nothing to import
There is no export/import step. Connect the same Google calendars (and Outlook / Apple if needed) and recreate the source→destination rules.
- 3
Live in about two minutes
OAuth-connect your calendars, choose full details or busy blocks (or a richer rule), and you are syncing.
Frequently asked questions
Common questions about switching from GCalSync.
Is CalendarPipe a replacement for GCalSync?
Is GCalSync cheaper?
Does CalendarPipe support busy-only sync?
Will GCalSync add Outlook and Apple?
Ready to switch from GCalSync?
Two minutes to set up. Free forever plan, no credit card. Or try Pro free for 14 days.