Can I open-source Calday?
YES · mature open-source replacementYes. Cal.com (37k stars), Easy!Appointments (4k stars) are mature open-source replacements for Calday — self-host with docker and stop paying.
Calday: People pay because a booking tool must never double-book them, leak private events, or send the wrong time to a client.
xrace-free booking under load
xteam routing and round robin
xreliable reminders and timezone edge cases
xcalendar-provider edge cases and timezone correctness
xmulti-calendar conflict handling
These projects already replace it, free.
EEasy!AppointmentsA proper provider-and-service booking system, provided you will also become its PHP and MySQL caretaker.open source↗CCal.comOpen scheduling infrastructure with booking pages, round-robin, routing forms, and app integrationsopen source↗What each one is, in full: Cal.com
no votes, no pay-to-list · just what's real
Calday pricing
| plan | monthly | annual (per mo) | what you get |
|---|---|---|---|
| free | $0 | $0 | 1 service, up to 100 clients, 1 integration and 1 booking page |
| pro | $12 | $9.60 | Unlimited services/clients; unlimited Google, Outlook and iCloud calendars plus Zoom/Meet; payments, add-ons and reminders |
free tier1 service, 100 clients, 1 integration and 1 booking page
billingmonthly + annual (-20%); 7-day Pro trial, no card; month-to-month cancellation
hidden costsStripe's normal payment-processing fees apply, though Calday takes no transaction cut. Existing customers are grandfathered if published prices change.
verified 2026-08-14 · source ↗
Can I open-source Calday?
Yes. Easy!Appointments replaces Calday today — self-host it on your own server or machine with no subscription. The full list of open-source alternatives is on this page.
How much does Calday cost?
Calday's pricing is usage-based or varies by plan · The official pricing URL is recorded, but a stable current amount was not safely recoverable in this pass. Do not publish a number until rechecked..
What do I lose by replacing Calday?
Honestly: race-free booking under load; team routing and round robin; reliable reminders and timezone edge cases; calendar-provider edge cases and timezone correctness; multi-calendar conflict handling. If any of those are load-bearing for you, keep paying.
Is there an open-source alternative to Calday?
Yes: Easy!Appointments (A proper provider-and-service booking system, provided you will also become its PHP and MySQL caretaker.) Cal.com (Open scheduling infrastructure with booking pages, round-robin, routing forms, and app integrations)