Calday alternatives: 2 open-source picks
These 2 Calday alternatives replace it for $0, led by Cal.com and Easy!Appointments. All 2 are open source. License, stars and last commit checked by hand on 2026-08-29. No trials, no crippled tiers.
Open scheduling infrastructure with booking pages, round-robin, routing forms, and app integrations
licenseAGPL-3.0 (+EE)
runsyour server
setupnot verified by us yet — check the repo README
facts verified 2026-08-29
A proper provider-and-service booking system, provided you will also become its PHP and MySQL caretaker.
licenseGPL-3.0
runsyour server
installUpload the release to PHP hosting, create a MySQL database, edit the configuration and run the web installer; Docker is optional
dataBookings, providers, services and customers live in MySQL; configuration and logs live on the web server, with optional Google Calendar synchronization
the catch vs CaldayIt has no managed hosting, built-in payment stack or turnkey SMS service, and the owner must maintain PHP and MySQL.
setupPHP and MySQL hosting with database permissions; Google Calendar sync additionally requires a Google Cloud OAuth application
facts verified 2026-08-10
What each one is, in full: Cal.com
last updated 2026-08-29 · no votes, no pay-to-list · just what's real
the usual suspects · recommended everywhere, rejected here
Picktime FreeThe free plan omits automated reminders, which is one of the small-business basics here.
how to choose a Calday alternative
Most proven
Cal.com, with 48,433 GitHub stars — the largest community of the 2, which usually means more answers when something breaks.
Needs real ops to self-host
Easy!Appointments is capable but expects someone to run a server, updates and backups. Budget for that before choosing it.
what you give up by leaving Calday
- 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
None of the picks above covers all of it. The full verdict says which gaps matter.
Calday alternatives at a glance
| tool | license | running it | platforms | stars | active |
|---|---|---|---|---|---|
| Cal.com | AGPL-3.0 (+EE) | docker to self-host | self-hosted, web | 48,433 | 2026-09 |
| Easy!Appointments | GPL-3.0 | self-host, real ops | web, self-hosted | 4,370 | 2026-09 |
why people still pay for Calday
Calday: People pay because a booking tool must never double-book them, leak private events, or send the wrong time to a client.
questions about switching from Calday
Is there an open-source alternative to Calday?
Yes: Cal.com, Easy!Appointments. Every tool on this page is open source: no trials, no crippled tiers.
Can open source really replace Calday?
Our verdict is YES. Cal.com (48k stars), Easy!Appointments (4k stars) are mature open-source replacements for Calday — self-host with docker and stop paying. The full verdict, and what you give up by switching, is at caniopensourceit.online/calday.
What is the most popular open-source Calday alternative?
By GitHub stars, Cal.com (48,433). Easy!Appointments is next with 4,370.
