Cal.com logo

Cal.com

Emerging

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.

39
AI Score
Grade D
AI Visibility Score (Beta)

Company Overview

About Cal.com

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.

Business Model & Competitive Advantage

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.

Competitive Landscape 2025–2026

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.

Founded
2021
Headquarters
San Francisco, Cal
Curated content • Fact-checked and verified

Recent Activity

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Key Differentiators

Emerging Innovator

Cal.com is an emerging player bringing innovative solutions to the Productivity & Collaboration market.

Frequently Asked Questions

Estimated Visibility Trend (Beta)

Simulated 8-week rolling score

39
→ Stable

Based on estimated brand signals. Historical tracking coming soon.

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