Cal.com API (Open Source)

Cal.com API is the developer-focused infrastructure for the Cal.com scheduling platform. It provides programmable access to calendar synchronization, event booking, and availability management, allowing developers to build custom scheduling workflows into their own applications. Unlike proprietary competitors, it is built on an open-source core with a focus on extensibility and data sovereignty.

Brand Authority Index (BAI): 72/100

Archetype: Challenger

Category: Software Development Tools

https://optimly.ai/brand/cal-com-api-open-source

Last analyzed: April 10, 2026

Verified from Cal.com API (Open Source) website

Founded: 2021

Headquarters: Remote / Peerric (Peer Richelsen & Bailey Pumfleet)

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