OneCal syncs calendars. CalendarPipe lets you program them.
OneCal is a solid calendar sync tool with scheduling links. CalendarPipe goes further with programmable rules — filter events, transform titles, strip details — all in a sandbox you control.
- Free forever plan
- No credit card
- 2 min setup
Where OneCal falls short
OneCal has 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.
No API access
OneCal doesn't offer a REST API or CalDAV access for developers and automations. CalendarPipe gives you both, plus an MCP server for AI agents.
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.
Feature comparison
CalendarPipe vs OneCal — side by side.
| Feature | CalendarPipe | OneCal |
|---|---|---|
| Google Calendar | ||
| Outlook / Microsoft 365 | ||
| Apple Calendar / CalDAV | ||
| ICS Feed support | ||
| Programmable sync rules | ||
| Event filtering & transformation | Full (JS sandbox) | Basic toggles |
| Invitation-based delivery | ||
| REST API | ||
| CalDAV access | ||
| MCP server (AI agents) | ||
| Free plan | Forever free | Trial only |
| Unlimited calendars | $4/mo | $25/mo |
| Scheduling links |
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.
Built for developers too
REST API, CalDAV access, and an MCP server for AI agents. Integrate calendar sync into your workflows, automations, and AI tools.
Real free plan
CalendarPipe's free plan is forever — 2 calendars, 1 sync rule, no time limit. OneCal only offers a trial.
Frequently asked questions
Common questions about switching from OneCal.
Is CalendarPipe a replacement for OneCal?
For calendar sync, yes. CalendarPipe offers more powerful sync rules and is significantly cheaper. However, OneCal includes scheduling links and a calendar view — features CalendarPipe doesn't have.
Does CalendarPipe support the same calendar providers?
Yes — Google Calendar, Outlook / Microsoft 365, and Apple Calendar are all fully supported. CalendarPipe also supports ICS feeds.
What makes CalendarPipe sync rules different?
CalendarPipe runs your rules as JavaScript in a sandboxed environment. You can filter events by any field, transform titles and descriptions, strip sensitive information, and apply complex conditional logic. OneCal's rules are limited to UI toggles.
Can I try CalendarPipe for free?
Yes — the free plan includes 2 calendar connections and 1 sync rule with no time limit. It's not a trial; it's a real free tier.
Ready to switch from OneCal?
Two minutes to set up. Free forever plan. No credit card required.