# Cal.com API (Open Source)

> Publicly sourced profile assembled by Optimly, in the Optimly AI Brand Index. Last refreshed 2026-10-04.

- **Business Profile:** https://optimly.ai/brand/cal-com-api-open-source
- **Dataset:** https://optimly.ai/brand/cal-com-api-open-source.json
- **Markdown:** https://optimly.ai/brand/cal-com-api-open-source/llms.txt
- **Official website:** https://cal.com
- **Slug:** cal-com-api-open-source
- **Categories:** collaboration-productivity, developer-tools

## Overview

- **Tagline:** It provides a completely headless, open-source scheduling infrastructure that allows developers to maintain full control over their data and user experience.
Source: Brand's website (https://cal.com) · 2026-10-04

- **Description:** 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.
Source: Brand's website (https://cal.com) · 2026-10-04

## Offerings

- **Core capabilities:**
  - Scheduling API
  - Webhooks
  - Branding/White-labeling
  - Atom components
Source: Brand's website (https://cal.com) · 2026-10-04

- **Pricing:** Freemium / Enterprise Licensing for API
Source: Brand's website (https://cal.com) · 2026-10-04

## Audience

- **Target industry:** Software Developers, SaaS Platforms, Marketplaces, Healthcare Portals
Source: Brand's website (https://cal.com) · 2026-10-04

## Landscape

- **Competitors:**
  - Calendly API
  - Cronofy
  - Nylas-Scheduler
  - Acquire.com (Scheduling functionality)
Source: Brand's website (https://cal.com) · 2026-10-04

Page last updated 2026-10-17.