Side by side
FullCalendar vs WhenTo
Both stand on calendar apps. Which one you can start free with, which one lets you read the code, and what each costs once you pay.
Free plan APISelf-hostedWeb
FullCalendar provides a broad JavaScript calendar foundation with flexible distribution and integrations. Buyers should distinguish MIT-licensed standard features from Premium’s paid views, rendering, and support terms.
Visit FullCalendar Free plan Self-hostedWeb
WhenTo focuses on recurring scheduling around shared availability rather than one-off polls. Its free cloud option is capped at three calendars, while self-hosting removes that calendar limit but requires operating the software yourself.
Visit WhenToThe facts
| FullCalendar | WhenTo | |
|---|---|---|
| Free plan | Yes | Yes |
| Open source | Not published | Not published |
| Runs on | API, Self-hosted, Web | Self-hosted, Web |
| Lowest paid plan | Premium: $480, paid once | Free or on request |
| Plans published | 3 | 2 |
| Maker | Not published | Not published |
| Website | fullcalendar.io | whento.be |
| On calendar apps | #91 of 194 | #87 of 194 |
FullCalendar: what it does well
- Multiple standard calendar views
- Broad framework integration documentation
- API supports drag and resize
- Screen-reader optimization described
- NPM, ZIP, and CDN distribution
What to know first
- Shared calendars are not supported
- Premium costs $480 a month
- Premium evaluation bars commercial production use
- Premium support is limited to two monthly tickets
WhenTo: what it does well
- Weekly availability patterns and exceptions
- Threshold notifications through four channels
- Shared-link participation without accounts
- Unlimited calendars when self-hosted
- Docker Compose deployment instructions
What to know first
- Cloud accounts are limited to three calendars
- No paid tier to raise the cloud limit
- Calendar synchronization is one-way
- No mobile apps listed
Alternatives to FullCalendar Alternatives to WhenTo The whole list