Alternatives / Calendly
Looking for an open source Calendly alternative? We compared 3 open source scheduling tools by license, self-hosting, calendar integrations, group polling, and pricing. They cover booking pages, group meeting polls, and appointment scheduling for businesses.
Written by Maxime DERAME
Last updated:
| Alternative | Best for | License |
|---|---|---|
| Cal.diy (Cal.com community edition) | Personal booking links and integrations | MIT |
| Rallly | Group scheduling polls without accounts | AGPL-3.0 |
| Easy!Appointments | Appointment booking for businesses | GPL-3.0 |
We looked for open-source tools that overlap with Calendly's core: letting others book time with you or agree on a meeting time. We verified each project's license, recent activity, stars, and self-hosting in its repository. Cal.com, the best-known name, now keeps its commercial product separate, so we list its MIT-licensed community edition, Cal.diy, and explain the difference. See our methodology for the full criteria.
Cal.diy is the open-source community edition of Cal.com, a fork with all enterprise and commercial code removed and licensed fully under MIT. Teams, Organizations, Insights, Workflows, and SSO or SAML are not included, and its maintainers recommend it for personal, non-production use. For commercial use, Cal.com sells hosted and on-premise enterprise versions.
Cal.diy offers personal booking links with calendar and video conferencing integrations. Rallly is a group scheduling poll for finding a time that works for everyone, with no account required. Easy!Appointments is an appointment booking system for businesses such as clinics and salons, with customer and staff management.
Cal.diy is MIT, Rallly is AGPL-3.0, and Easy!Appointments is GPL-3.0. Easy!Appointments also offers optional paid premium features and professional services.
Cal.diy connects to Google, Outlook, Apple, CalDAV, Zoho, and Exchange calendars and to video tools such as Zoom, Google Meet, Teams, Webex, and Jitsi, with webhooks for Zapier, n8n, and Make. Easy!Appointments synchronizes with Google Calendar, and Rallly works standalone.
Cal.diy, Rallly, and Easy!Appointments were all updated within days or weeks of this update.
Calendly is a proprietary scheduling service whose team features, integrations, and workflows sit behind paid plans, with booking data stored on its servers. Open-source alternatives let you self-host scheduling, own the data, connect your own calendars and video tools, and avoid per-seat pricing, at the cost of maintaining the service and fewer polished enterprise features.
| Alternative | Type | License | Self-hosted | Best for |
|---|---|---|---|---|
| Cal.diy (Cal.com community edition) | Booking links | MIT | Yes | Individuals and self-hosters |
| Rallly | Group polls | AGPL-3.0 | Yes | Group scheduling |
| Easy!Appointments | Appointment booking | GPL-3.0 | Yes | Clinics, salons, and services |
Want personal booking links like Calendly
Cal.diy offers event types, availability rules, calendar integrations, video conferencing, payments, and a REST API under the MIT license, without Cal.com's enterprise features.
Want to find a time for a group meeting
Rallly lets participants vote on date and time options in real time, with no account required.
Run a business with appointments and staff
Easy!Appointments handles customers, services, staff, email notifications, and Google Calendar sync on your own server.