OneCal - The Best
Unified.to alternative
for Calendar API
With more than 1 billion synchronized events across Outlook, Google Calendar, and iCloud Calendar, thousands of happy customers, and pricing that scales with your product, OneCal's Unified Calendar API is the #1 alternative to Calendar API.
Unified.to Alternative
What does OneCal Unified Calendar API offer as a Unified.to alternative?
Outlook, Google Calendar, and iCloud Calendar Support
The OneCal Unified Calendar API is a calendar-specific API that allows you to integrate with Outlook, Google Calendar and iCloud Calendar using a single API.

Used and tested in the real world
OneCal's products, like Calendar Syncing, Scheduling Links, and Calendar View, are used by thousands of individuals and companies all around the world. We're known for our calendar synchronization reliability and outstanding customer support. Our Unified Calendar API is used across all our products, and to date, we've synchronized millions of calendar events across all major calendar providers with great accuracy.

Not scheduling specific
The OneCal Unified Calendar API is a calendar API that allows you to work with all calendar providers using a single API. Our APIs are not scheduling-specific; you can build any app you want, as long as you need to interact with a calendar.

Pricing that scales with you
We understand that calendars are just a portion of your product, so we don't want to get a chunk of your revenue. After tens of user interviews, we've gotten tons of feedback and have the right insights regarding what pricing model makes sense for most companies.

Your App <> Webhooks
Webhooks are very necessary in most cases, as they allow your app to react when changes happen to a calendar. Not all calendar providers offer webhooks (iCloud for example), but rest assured, you can register webhooks in our Unified Calendar API product and get notified as changes happen, no matter the calendar provider.

Switch to OneCal Unified Calendar API
Stop spending time on custom implementation and maintenance for each calendar provider and focus on what's most important for your product.