It's FOSS Apr 17, 2026 Cal.com Goes Close Source Because "AI Can Easily Exploit Open Source Software" That said, the old codebase will live on as Cal.diy under the MIT license. Read Full Article on It's FOSS → 📋 Copy Link Sponsored The Art of UNIX Programming View on Amazon Sponsored YubiKey 5 NFC Security Key View on Amazon Sponsored USB to Ethernet Adapter View on Amazon As an Amazon Associate I earn from qualifying purchases. ← Back to all articles