OneCal charges per user. CalendarPipe charges $4 flat.
OneCal prices per user — $5 a month on Starter for 2 calendars, rising to $25 for 50. CalendarPipe is $4 a month flat for unlimited calendars, and its rules are code you write rather than toggles you pick.
- Free forever plan
- No card for the free plan
- 14-day Pro trial (card required)
- 2 min setup
Where OneCal falls short
OneCalhas strengths, but here's what users run into.
Sync rules are UI-only
OneCal gives you toggles and dropdowns to configure sync. That works for simple cases, but falls short when you need to filter by keyword, transform event titles, or apply conditional logic.
Calendar caps on lower tiers
OneCal's Starter plan limits you to 2 calendars. If you have a work Google, personal Gmail, and an Apple Calendar, you're already over the limit.
The API is for provisioning, not events
OneCal ships a user-provisioning API and an MCP server for its assistant, but nothing that reads or writes sync rules and events. CalendarPipe's REST API does, and its agent skills are installable.
Higher cost at scale
OneCal's Premium plan (up to 50 calendars) runs $25/month. CalendarPipe Pro is $4/month for unlimited calendars and sync rules.
Why teams switch to CalendarPipe
Code-level control
Filter by keyword, transform titles, strip attendees, conditionally skip events. Use the visual builder, plain English, or write TypeScript. OneCal gives you toggles — CalendarPipe gives you a programming language.
10x cheaper at scale
CalendarPipe Pro is $4/month for unlimited calendars and sync rules. OneCal charges $25/month for their Premium tier with up to 50 calendars (pricing as of August 2026).
Built for developers too
A REST API over events and sync rules, plus installable agent skills. OneCal's API covers user provisioning and its MCP server drives the assistant — a different surface.
Real free plan
CalendarPipe's free plan is forever — 2 calendars, 1 sync rule, no time limit. OneCal only offers a trial.
Feature comparison
CalendarPipe vs OneCal — side by side.
| Feature | CalendarPipe | OneCal |
|---|---|---|
| Google Calendar | Yes | Yes |
| Outlook / Microsoft 365 | Yes | Yes |
| Apple Calendar / CalDAV | Yes | Yes |
| ICS Feed support | Yes | No |
| Programmable sync rules | Yes | No |
| Event filtering & transformation | Full (JS sandbox) | Basic toggles |
| Invitation-based delivery | Yes | No |
| REST API | Yes | User provisioning |
| Agent skills (AI agents) | Yes | MCP server |
| Free plan | Forever free | Trial only |
| Unlimited calendars | $4/mo | $25/mo |
| Scheduling links | No | Yes |
When OneCal is the better choice
We'd rather you pick the right tool than the one we sell.
You want scheduling links from the same vendor
OneCal includes scheduling links — a feature CalendarPipe doesn't have. If booking pages and calendar sync coming from one product matters to you, OneCal covers both and CalendarPipe covers one.
You want a calendar view, not just sync
OneCal ships a calendar view of your connected accounts. CalendarPipe has no calendar UI at all — it writes to the calendar apps you already use and gets out of the way.
Toggles are all you ever want to touch
OneCal configures sync with toggles and dropdowns. CalendarPipe's power comes from rules, and even the visual builder assumes you want to shape events. If your sync is simple and you'd rather never see a rule editor, that's a smaller surface to learn.
Frequently asked questions
Common questions about switching from OneCal.
Is CalendarPipe a replacement for OneCal?
Does CalendarPipe support the same calendar providers?
What makes CalendarPipe sync rules different?
Can I try CalendarPipe for free?
Ready to switch from OneCal?
Two minutes to set up. Free forever plan, no credit card. Or try Pro free for 14 days.
Keep reading
- How to sync Google Calendar with Outlook
The full walkthrough for the pairing most people start with.
- How to hide event details when sharing your calendar
Keeping titles and notes off the copy that lands elsewhere.