Cal.com Review — The open-source scheduling infrastructure for everyone

Cal.com is an open-source scheduling platform that allows individuals and businesses to manage appointments, meetings, and bookings. It offers round-robin scheduling, team scheduling, recurring bookings, and integration with major calendar providers. The platform can be self-hosted for complete data control or used as a managed cloud service.

Developers and businesses wanting full scheduling control

Open-source core with self-hosting option gives unique competitive positioning

Peer Richelsen is a German-born entrepreneur who dropped out of university to pursue tech. Before Cal.com, he worked on various open-source projects and was deeply involved in the scheduling space. He co-founded Cal.com (formerly Calendso) in 2021 with Bailey Pumfleet, positioning it as the open-source alternative to Calendly. The company has raised $32M and gained strong developer community support.

Cal.com is a legitimate open-source company with a transparent codebase on GitHub (25k+ stars). Founded in 2021, it has raised $32M from leading investors including Dick Costolo and Open Source Capital. The company is headquartered in the US with a distributed team. Full financial transparency and open-source nature eliminate any scam concerns.

Developers wanting self-hosted scheduling, businesses needing white-label booking pages, teams requiring complex routing logic, organizations with strict data sovereignty requirements, and anyone frustrated with Calendly pricing at scale.

Cal.com offers a free tier for individuals with unlimited bookings. Team plan starts at $15/user/month with round-robin and collective scheduling. Enterprise plan includes SAML SSO and custom contracts. Self-hosting is always free, making it incredibly cost-effective for technical teams.