Cal.com
CRM & SalesOpen-source Calendly alternative with full customization, team scheduling, round-robin, and self-hosting option — the scheduling tool developers love.
Cal.com is an open-source scheduling infrastructure platform (AGPLv3) that serves as a powerful alternative to Calendly, offering both hosted SaaS and self-hosting capabilities for complete control over scheduling data. Its free tier is remarkably generous with unlimited bookings, event types, workflows, and payment processing via Stripe and PayPal, while its developer-first approach provides a REST API, webhooks, and React-based components (Atoms) for embedding scheduling into custom applications. Paid plans unlock round-robin scheduling, team routing, and enterprise compliance certifications including SOC 2, ISO 27001, and HIPAA, with 70+ integrations and 99.99% uptime SLA.
Best for
Developer teams and privacy-conscious organizations that need open-source scheduling infrastructure with self-hosting capabilities and extensive API customization.
Last updated: February 23, 2026
24/50
Overall Score
API Quality
10/10
GTM Relevance
14/20
PricingFreemium
Complexityhard
Learningeasy
Visit cal.com →API Analysis
REST API
✓
Available
Webhooks
✓
Available
GraphQL
—
—
OAuth
—
—
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Pricing
freemiumFree Tier
Free for individuals, Team $15/user/mo, Enterprise $37/user/mo
Strengths & Weaknesses
Strengths
Exceptionally generous free plan with unlimited bookings, event types, calendars, and workflows—far more than Calendly's single event type limitation
Open-source with full self-hosting option under AGPLv3, providing complete data ownership and transparency
Comprehensive API, webhooks, and React components (Atoms) for embedding scheduling into custom applications
Enterprise compliance certifications including SOC 2, ISO 27001, and HIPAA on higher tiers
Built-in payment processing via Stripe and PayPal without requiring third-party plugins
Weaknesses
Self-hosting requires DevOps expertise with Node.js, PostgreSQL, and Docker infrastructure
Advanced features like workflows and routing have a steeper learning curve than simpler competitors
No native Android mobile app yet (iOS only, plus responsive web)
Enterprise compliance features (SOC 2, HIPAA) locked behind higher-tier paid plans
Alternatives
Reviews
Links
FAQ
What is Cal.com?
Cal.com is an open-source scheduling infrastructure platform (AGPLv3) that serves as a powerful alternative to Calendly, offering both hosted SaaS and self-hosting capabilities for complete control over scheduling data. Its free tier is remarkably generous with unlimited bookings, event types, workflows, and payment processing via Stripe and PayPal, while its developer-first approach provides a REST API, webhooks, and React-based components (Atoms) for embedding scheduling into custom applications. Paid plans unlock round-robin scheduling, team routing, and enterprise compliance certifications including SOC 2, ISO 27001, and HIPAA, with 70+ integrations and 99.99% uptime SLA.
Is Cal.com free?
Yes, Cal.com offers a free tier. Free for individuals, Team $15/user/mo, Enterprise $37/user/mo
What are Cal.com alternatives?
Popular alternatives to Cal.com include Calendly, SavvyCal, YouCanBookMe, Acuity Scheduling, TidyCal, Koalendar. Compare features, API quality, and pricing on GTM Tools.
Does Cal.com have an API?
Yes, Cal.com provides a REST API. API quality is rated EXCELLENT. Documentation: https://cal.com/docs/api-reference/v2/introduction.
Who is Cal.com best for?
Developer teams and privacy-conscious organizations that need open-source scheduling infrastructure with self-hosting capabilities and extensive API customization.