Calendly alternatives: 7 free & open-source picks
Curated, verified, and actually free. No trials, no crippled tiers. Star counts and last-activity dates checked by hand, not scraped and forgotten.
ZombieUnlimited solo event types, calendars and bookings, with payments and notifications; team routing costs money.
licenseMIT
runsyour machine or their cloud
installHosted signup, or Docker Compose with PostgreSQL for self-hosting
dataHosted bookings, availability, integrations, and attendee data live in Cal.com's cloud; self-hosted deployments store core data in PostgreSQL and files or integration data in the configured services.
vs CalendlyCal.com's broader, more technical product is less turnkey, and team routing, collective scheduling, and organization controls remain paid.
setupThe hosted product is straightforward, but self-hosting requires Docker, PostgreSQL, environment secrets, email delivery, OAuth credentials, a domain, and upgrades.
facts verified 2026-08-10
One bare appointment page inside the calendar you already use; reminders, payments and polish are paid.
licenseproprietary, free
runstheir cloud
installUse the appointment-schedule feature inside Google Calendar
dataAvailability and bookings are stored as Google Calendar and appointment-schedule data in the user's Google account; the internal storage format is not disclosed.
vs CalendlyA personal Google account gets only one booking page and lacks Calendly's paid reminders, payment collection, screening forms, and automation integrations.
setupno real blockers; verified to install clean
facts verified 2026-08-10
Unlimited booking pages and two calendar connections; payments, forms, reminders and team routing are paid.
licenseproprietary, free
runstheir cloud
installHosted signup and calendar connection
dataBooking pages, invitee answers, and availability settings live in Koalendar's cloud, while confirmed bookings are synchronized to connected Google, Outlook, or iCloud calendars; the internal format is not disclosed.
vs CalendlyPayments, intake forms, automated reminders, group events, and team routing are paid, so the free product stops at uncomplicated one-to-one scheduling.
setupThe first setup step is granting calendar OAuth access; paid-only forms, reminders, payments, and team features appear quickly once the booking flow becomes more than basic.
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.
vs CalendlyThe free plan connects only one calendar and withholds group meetings, custom emails, automatic video links, and analytics.
setupConnecting the calendar is easy, but the free account is limited to one calendar and omits several workflow customizations.
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 and appointment records live in YouCanBookMe's cloud, with events synchronized to the connected calendar; the internal storage format is not disclosed.
vs CalendlyThe free account is limited to one booking page and one connected calendar, so separate meeting types or calendars quickly force an upgrade.
setupThe setup itself is clean; the obstacle is structural rather than technical, one booking page and one connected calendar.
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 and calendar connection
dataScheduling links, availability, answers, and booking records live in zcal's cloud and synchronize to connected calendars; the internal storage format is not disclosed.
vs CalendlyTeam and routing features are paid, and free-plan Stripe payments lose an additional 3% to zcal.
setupCalendar OAuth is straightforward, but accepting Stripe payments on the free plan adds zcal's 3% commission.
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 and calendar connection
dataServices, availability, customer details, and bookings live in Zoho's cloud and synchronize with connected calendars; the internal storage format is not disclosed.
vs CalendlyThe free plan is limited to one user and leaves payment integrations, team scheduling, and advanced workflow customization to paid tiers.
setupA Zoho account and calendar connection are easy; configuring services, time zones, and notification rules is the first non-trivial step.
facts verified 2026-08-10
last updated 2026-08-10 · no votes, no pay-to-list · just what's real
Cal.diySelf-hostable, yes; also explicitly a hobbyist, non-production fork that expects database and security expertise.
| tool | license | running it | platforms | stars | active |
|---|---|---|---|---|---|
| Cal.com Free | MIT | they host it | web, macos, windows, linux, ios, android, browser-extension | — | — |
| Google Calendar appointment schedules | proprietary, free | they host it | web, ios, android | — | — |
| Koalendar Free | proprietary, free | they host it | web, browser-extension | — | — |
| TidyCal Free | proprietary, free | they host it | web | — | — |
| YouCanBookMe Free | proprietary, free | they host it | web, browser-extension | — | — |
| zcal Free | proprietary, free | they host it | web | — | — |
| Zoho Bookings Free | proprietary, free | they host it | web, ios, android, browser-extension | — | — |
They pay because double-booking or missed meeting invites is costly. If none of that applies to you, any pick above saves $144 a year.
Is there a free alternative to Calendly?
Yes: Cal.com Free, Google Calendar appointment schedules, Koalendar Free and 4 more. Every tool on this page is either open source or genuinely free to use long-term: no trials, no crippled tiers.
Should I just build my own Calendly?
Our verdict is KINDA. A single-user booking page is easy; production-grade scheduling needs OAuth, availability rules, time zones, reminders, payments, team routing, and trust. If you'd rather build, the exact one-shot prompt is free at canivibecodeit.com/calendly.
