zcal alternatives: 3 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.
One active event type and unlimited bookings; meeting polls survive, workflows and teams do not.
licenseproprietary, free
runstheir cloud
installHosted signup and one calendar connection
dataEvent-type settings, invitee answers, scheduling activity and account data live in Calendly's cloud; confirmed meetings are synchronized to the connected calendar, and the internal storage format is not disclosed.
the catch vs zcalCalendly Free is dependable for one active event type, but zcal's personalized pages and group-poll experience become harder to reproduce once more than one booking flow is needed.
setupSetup is clean, but the permanent free account is limited to one one-to-one event type and one connected calendar.
facts verified 2026-08-10
Unlimited one-person booking types and paid bookings on one calendar; group meetings and fancy emails cost extra.
licenseproprietary, free
runstheir cloud
installHosted signup and one calendar connection
dataBooking types, attendee answers and booking records live in TidyCal's cloud and are synchronized to the connected calendar; the internal storage format is not disclosed.
the catch vs zcalTidyCal Free handles one-person booking links, but one connected calendar and no free group-meeting workflow make it a poor substitute for zcal's polls and multi-person scheduling.
setupThere is no technical install hurdle, but free accounts get only one calendar connection and omit automatic video links, group meetings, custom emails, exports, analytics and API access.
facts verified 2026-08-10
One booking page, but it keeps forms, payments, confirmations, polls and the calendar-overlay trick.
licenseproprietary, free
runstheir cloud
installHosted signup and one calendar connection
dataBooking-page configuration, form answers and appointment records live in YouCanBookMe's cloud, with events synchronized to the connected calendar; the internal storage format is not disclosed.
the catch vs zcalYouCanBookMe Free retains capable booking forms and polls, but one booking page and one connected calendar sharply limit the personalized set of scheduling pages zcal is built around.
setupThe setup itself is clean; the first hard limit is one booking page and one connected calendar.
facts verified 2026-08-10
latest recorded source check 2026-08-10 · check current terms at the source
RalllyA superb poller, but it does not also provide reusable one-to-one scheduling links.
| tool | license | running it | platforms | stars | active |
|---|---|---|---|---|---|
| Calendly Free | proprietary, free | they host it | web, ios, android, browser-extension | — | — |
| TidyCal Free | proprietary, free | they host it | web | — | — |
| YouCanBookMe Free | proprietary, free | they host it | web, browser-extension | — | — |
zcal: 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 zcal?
Yes: Calendly Free, TidyCal Free, YouCanBookMe Free. 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 zcal?
Our verdict is YES. zcal's solo core is compact: build a personal freeform scheduling 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 zcal build guide.
