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Scheduling 1 alternatives tracked

Open-source alternatives to Calendly

Calendly is a scheduling automation tool that lets people book meetings based on your real-time calendar availability, removing email back-and-forth. It integrates with Google Calendar, Outlook, and Zoom to enforce buffer times, meeting type limits, and round-robin distribution across team members. Used primarily by sales, recruiting, and customer success teams.

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The alternatives

cal.diy

★ 42,363 TypeScript MIT

Scheduling infrastructure for absolutely everyone.

calcom/cal.com Updated 2026-05-05

Comparison notes

Cal.com is the closest OSS alternative, offering self-hosted scheduling with Google Calendar, Office 365, and video conferencing integrations, plus team availability. It covers most Calendly use cases including routing forms and round-robin. The main gaps: Calendly's Salesforce integration for logging booked meetings as CRM activities has no cal.com equivalent at comparable depth. Calendly's routing forms (directing bookers to different meeting types based on answers) are more mature in Calendly than cal.com. Self-hosting cal.com requires managing database and email infrastructure.

Migration tips

  • Export past meeting data from Calendly via the API (/v1/scheduled_events) before migrating
  • Recreate your event types in cal.com with equivalent durations, buffer times, and scheduling limits
  • Update embedded scheduling links on your website and email signatures to the new cal.com URLs
  • Reconnect calendar and conferencing integrations (Google Calendar, Zoom, Teams) in cal.com
  • Inform regular bookers of the URL change — old Calendly links will stop working after account deletion

FAQ

Can I fully replace Calendly with an OSS tool?

Feature parity varies. Most OSS alternatives cover 70-90% of core workflows, but may lack polish, integrations, or specialized features. Pilot the alternative with a subset of your team before fully committing.

What's the cost of self-hosting?

Plan for ~$5-50/month in VPS costs (DigitalOcean, Hetzner, etc.) plus 2-8 hours/month in maintenance. For a team of 20+, self-hosting usually breaks even against SaaS pricing within 6-12 months.

Which alternative should I pick?

Sort by GitHub stars (a proxy for community health), check the last-pushed date (avoid unmaintained projects), and read recent issues to gauge responsiveness.