Open source alternatives to Calendly

One project on starwire does the same job. Ranked by how much of what Calendly does each one covers, read from its README and website. Ties go to the most active.

What Calendly does

Booking links for meetingscore
Calendar sync for availabilitycore
Event types and durations
Reminders and notifications
Video meeting links
Team and round-robin scheduling
Payments for bookings

Each dot in the table is one job, in this order. Square dots are core jobs and count double. Full means yes, half means partly. "See the evidence" under a project shows the line behind each one. Coverage is what a project documents, not how well it works or how hard it is to move to. How we score this

Project	Covers	Stars	Commits, 12 weeks	Last release	Closed vs opened	Setup	License
cal.diyOpen source scheduling app with Next.js, Prisma and PostgreSQL	Replaces it78%	50k+250	32	9 months ago	33%	Needs a server	MIT
Covers all 2 core jobs. Not shown: Reminders and notifications; Team and round-robin scheduling.See the evidence Booking links for meetingscoreYesPrivate Links (Hashed URLs) Calendar sync for availabilitycoreYesCALENDAR INTEGRATIONS Google Calendar Event types and durationsYesEvent Types ✅ ✅ Recurring Event Types Reminders and notificationsNot shownNeither the README nor the website mentions it. Video meeting linksYesVIDEO CONFERENCING Cal Video (Daily.co) Team and round-robin schedulingNot shownNeither the README nor the website mentions it. Payments for bookingsYesPaid Events (Stripe/PayPal)

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