Calday alternatives: 6 free & open-source picks
Compare recorded free and open-source options, their capabilities and operating requirements. Source dates are shown below; licenses, hosted limits and project activity can change.
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
One staffer gets reminders, classes and Square checkout for 100 bookings a month; growth wakes the paywall.
licenseproprietary, free
runstheir cloud
installHosted signup
dataBooking, customer, service and staff records live in Appointy's cloud, with connected calendar and payment data also handled by their respective providers
setup✓ installs clean
the catch vs CaldayOne staff member, five services, 100 monthly appointments and no free two-way calendar sync make it easier to outgrow than Calday.
facts verified 2026-08-10
Four staff, payments, classes and 200 monthly bookings; SMS, recurring appointments and two-way sync cost extra.
licenseproprietary, free
runstheir cloud
installHosted signup
dataBooking, customer and staff records live in Setmore's cloud, with calendar and payment records also passing through connected providers
setup✓ installs clean
the catch vs CaldayThe free plan caps bookings at 200 and excludes recurring appointments, SMS reminders and two-way calendar sync.
facts verified 2026-08-10
A serious free solo booking stack where Square operates; processing fees remain and the feature mix varies by country.
licenseproprietary, free
runstheir cloud
installCreate or use a Square seller account and enable Appointments
dataAppointment, customer, staff and transaction records live in Square's cloud
the catch vs CaldayIt is available only in supported Square markets, the free tier is solo and the workflow is tied to Square's payment ecosystem.
setupA Square seller account and identity verification, and the service must be available in the user's country
facts verified 2026-08-10
Unlimited links and calendars, custom questions, email reminders and Stripe payments; teams are paid and zcal takes 3%.
licenseproprietary, free
runstheir cloud
installHosted signup
dataAccount and booking records live in zcal's cloud; Stripe processes and stores payment details for paid bookings
setup✓ installs clean
the catch vs CaldayIt is more meeting-link-oriented and has less provider and service-business administration, while Stripe payments cost an extra 3%.
facts verified 2026-08-10
A real one-person booking desk with forms, reminders and two-way sync; staff and payment plumbing cost extra.
licenseproprietary, free
runstheir cloud
installHosted signup
dataAccount, booking and customer records live in Zoho's data centres and are synchronized with connected calendar and meeting providers
setup✓ installs clean
the catch vs CaldayIt is limited to one user and one service and does not include payment collection on the free plan.
facts verified 2026-08-10
latest recorded source check 2026-08-10 · check current terms at the source
Picktime FreeThe free plan omits automated reminders, which is one of the small-business basics here.
| tool | license | running it | platforms | stars | active |
|---|---|---|---|---|---|
| Easy!Appointments | GPL-3.0 | self-host, real ops | web, self-hosted | 4,300 | 2026-07 |
| Appointy Free | proprietary, free | they host it | web, ios, android | — | — |
| Setmore Free | proprietary, free | they host it | web, ios, android | — | — |
| Square Appointments Free | proprietary, free | they host it | web, ios, android | — | — |
| zcal Free | proprietary, free | they host it | web | — | — |
| Zoho Bookings Free | proprietary, free | they host it | web, ios, android, browser-extension | — | — |
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 these alternatives
Is there a free alternative to Calday?
Yes: Easy!Appointments, Appointy Free, Setmore Free and 3 more. These are recorded free or open-source options. Compare their feature limits, licenses, hosting costs and current availability before choosing.
Should I just build my own Calday?
Our verdict is YES. Calday's solo core is compact: build a personal booking links tool that reads one calendar, publishes availability, reserves a slot, and writes the event back. A competent builder can reach a useful personal version in one sitting, while the paid product mainly wins on OAuth, calendar reliability. Review the scope, implementation prompt and trade-offs in the Calday build guide.
