# Cal.com

**Source:** https://geo.sig.ai/brands/calcom  
**Vertical:** Productivity & Collaboration  
**Subcategory:** General  
**Tier:** Emerging  
**Website:** cal.com  
**Last Updated:** 2026-04-14

## Summary

Open-source scheduling infra with 30K+ GitHub stars; $25M Series A (2023); API-first appointment booking embeddable into any product; self-hostable under AGPLv3 license. Founded 2021, SF.

## Company Overview

Cal.com is the leading open-source scheduling infrastructure platform, enabling businesses and developers to build appointment booking and calendar management into any application. Founded in 2021 and headquartered in San Francisco, Cal.com offers both a hosted SaaS product and a self-hostable open-source version under the AGPLv3 license. The platform integrates with Google Calendar, Outlook, Zoom, Stripe, and hundreds of other tools via a composable API-first architecture.

The company raised $25 million in Series A funding in 2023 from Fuel Capital and other investors, accelerating its enterprise roadmap and expanding the open-source community. Cal.com's GitHub repository has accumulated over 30,000 stars, making it one of the most popular open-source scheduling projects. By 2024-2025, the platform serves individual creators, startups, and enterprise teams including use cases ranging from sales call booking to healthcare appointment management.

In 2025, Cal.com has expanded its platform to include team routing (round-robin, priority-based), managed user accounts for agencies, and Cal.ai — an AI-powered scheduling assistant that handles natural language booking via email and chat. The company competes with Calendly in the SMB market and custom-built solutions in enterprise, winning on developer flexibility and transparent open-source licensing. Cal.com's 2025 focus includes SOC 2 compliance, enterprise SLAs, and deeper CRM integrations for revenue teams.

## Frequently Asked Questions

### What is Cal.com?
Cal.com is an open-source scheduling infrastructure platform for individuals, businesses, and developers. It serves as a Calendly alternative with full customization and self-hosting options.

### What products and services does Cal.com offer?
Cal.com offers open-source scheduling, meeting booking pages, Cal.ai AI assistant, API for developers, and team scheduling solutions.

### Who is Cal.com designed for?
Cal.com is designed for individuals, businesses, and developers who need scheduling infrastructure with customization capabilities.

### When was Cal.com founded?
Cal.com was founded in 2021 and participated in Y Combinator's W21 batch.

### Where is Cal.com headquartered?
Cal.com is based in San Francisco, California.

### How much funding has Cal.com raised?
Cal.com has raised $32.4 million in total funding, including a $25 million Series A round in April 2022 led by Seven Seven Six (Alexis Ohanian). The company is also backed by Tobi Lütke, founder of Shopify.

### What are Cal.com's key achievements?
Cal.com has earned over 30,000 stars on GitHub, demonstrating strong open-source community adoption and support.

### What makes Cal.com's technology approach unique?
Cal.com is built as open-source software, offering full customization and self-hosting options that give users complete control over their scheduling infrastructure.

### How can I start using Cal.com?
Based on the provided information, Cal.com offers open-source scheduling solutions and developer APIs, though specific sign-up details are not included in the company description.

### What are Cal.com's recent developments?
Cal.com launched Cal.ai, an AI assistant, in October 2023 and released Cal.com 4.0 in May 2024, marking significant product updates and expansion of their platform capabilities.

## Tags

automation, b2b, global, open-source, productivity, saas, collaboration

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*Data from geo.sig.ai Brand Intelligence Database. Updated 2026-04-14.*