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Cal.com
Free / $15/user/mo (Teams)4.7/5
Self-hosted, open-source scheduling infrastructure with unlimited customization.
Why founders use Cal.com
Calendar sync (Google, Outlook, Apple, iCal)
Round-robin and team scheduling
Custom workflows and branding
Payment collection via Stripe
Routing forms and conditional logic
API access and webhooks
The Good
100% open-source—full code control and customization
Self-hosting option for privacy and data ownership
API-first architecture perfect for SaaS integration
Unlimited bookings on free plan
No commission fees on appointments
The Bad
Steeper learning curve for non-technical users
Self-hosting requires server knowledge
Smaller ecosystem compared to Calendly
The Verdict
Cal.com is the indie hacker's dream—an open-source, fully customizable scheduling platform built on GitHub where you own your data. Unlike Calendly, you can self-host Cal.com, access the full codebase, modify workflows, and integrate it into your own products via API-first design.\n\nIt's perfect for technical solopreneurs who want to white-label scheduling, build it into their SaaS, or simply escape vendor lock-in. The free plan includes unlimited bookings, calendar connections, and integrations. For $15/user/month on Teams plan, you unlock round-robin scheduling and routing forms without enterprise pricing.