About Cal.com
Scheduling infrastructure, not a calendar tool.
Cal.com was started in 2021 by Peer Richelsen and Bailey Pumfleet as an open-source alternative to Calendly, with a distributed team across Europe and the US. The product is positioned as scheduling infrastructure: a cloud SaaS for individuals and teams, an enterprise edition that self-hosts behind your own VPC, and a deep API plus webhook surface, with customers ranging from solo operators to teams at Vercel and Supabase.
For most go-to-market teams Cal.com is the booking layer behind the website, the CRM lead-routing flow, the recruiter outreach sequence and the customer-success quarterly review. That makes its event data worth a lot more in a warehouse than inside the Cal.com Insights tab. Book-rate per event type, no-show rate per traffic source, time-to-meet per segment and routing-form drop-off per question only matter when they sit next to the deals, hires and renewals that the meetings were supposed to drive.