Cal.com vs Microsoft Teams
Side-by-side comparison of AI visibility scores, market position, and capabilities
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.
About
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.
Microsoft 365 enterprise collaboration hub with 280M monthly active users for messaging, video, and files; integrating Copilot AI competing with Slack and Zoom for enterprise communication.
About
Microsoft Teams is Microsoft's enterprise collaboration hub within Microsoft 365 — integrating workplace messaging (chat channels and direct messages), video conferencing, file storage (SharePoint and OneDrive integration), and application extensions into a single platform that has become the primary communication tool for over 280 million monthly active users globally. Launched in 2017 as a replacement for Skype for Business, Teams became one of the most significant technology adoption stories in corporate history during COVID-19, growing from 44 million daily active users in March 2020 to 270 million monthly active users by 2023.
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