Cal.com
FreemiumOpen-source scheduling infrastructure for everyone
About Cal.com
Cal.com is the open-source Calendly alternative — self-host it on your own server and get unlimited event types, booking pages, and team scheduling without ever hitting a pricing wall. Built on Next.js, tRPC, and Prisma, the self-hosted stack runs with Docker Compose and takes about 20 minutes to get running from scratch. The scheduling engine covers one-on-one, round-robin, collective, and managed event types. Connects to Google Calendar, Outlook, Apple Calendar, Zoom, Google Meet, and MS Teams out of the box. Approximately 28,000 GitHub stars. Organizations that need booking data on their own servers — law firms, medical practices, GDPR-conscious companies — are the natural fit. The main complaint reported on Reddit is that the mobile experience is a browser-wrapped web app, not a real native client. Certain advanced features like routing forms and workflows are locked to the paid cloud plan, but those same features are fully available when you self-host. Teams using it alongside HubSpot or Salesforce usually bridge integrations through Zapier.
Key Features
Pricing Plans
Free
- Unlimited bookings
- Google/Outlook calendar sync
- Customizable booking pages
- Embed widgets
Team
- Round-robin scheduling
- Team pages
- Collective scheduling
- Routing forms
Organization
- SSO/SAML
- Admin controls
- Org-wide branding
- Priority support
Self-hosted
- Full source code
- Docker deploy
- Complete control
- Community support
Pros
- Fully open-source with self-hosting option
- No booking limits on free plan
- Deep API and webhook support
- Active community and rapid development
Cons
- Self-hosted setup requires technical knowledge
- Fewer native integrations than Calendly
- UI less polished than commercial alternatives
Best For
- Teams needing GDPR-compliant scheduling with data on their own servers
- Consultants and agencies replacing Calendly to avoid per-seat fees at scale
- Developers who want to embed booking flows directly into their own product
Not Ideal For
- Non-technical users who want a five-minute cloud setup with zero maintenance
- Mobile-first teams who need a polished native iOS or Android app
Potential Deal Breakers
- Mobile app is a browser wrapper, not a native experience
- Routing forms and workflows require paid cloud plan unless self-hosting
- Production self-hosting requires real infrastructure knowledge — not a one-click deploy
Data & Privacy
Fully open-source scheduling. Self-hosted keeps all booking data on your server. Cloud version hosted by Cal.com. No AI training, no data selling. GDPR compliant by design.
Who Is This For?
Hands-on tested May 2026
Signup Experience
Email or Google signup takes under a minute. The onboarding wizard walks through availability, event types, and calendar connections. Free tier is live with no credit card needed.
For Home Users
The best free Calendly replacement for individuals. Unlimited event types on the free plan is a genuine differentiator. The booking page looks professional and the Google Calendar sync is solid.
For Business Users
Team plan at $12/user/mo includes round-robin routing and collective scheduling. Significantly cheaper than Calendly for teams. Integration depth is narrower but covers the essentials. Self-hosting option appeals to compliance-conscious orgs.
Our Verdict
Cal.com has caught up to Calendly on core features and lapped it on price — the self-hosted version gives you everything free if you can run Docker. The cloud version is also competitive. Rough edges show on mobile and in some enterprise features, but for most scheduling use cases it delivers without the Calendly invoice.