Cal.com is going closed source

Cal.com has moved from open source to closed source, citing AI-powered vulnerability scanning as the primary threat vector. The company argues that AI security tools can systematically identify vulnerabilities in publicly visible codebases far more efficiently than traditional human-led exploitation, rendering the transparency benefits of open source untenable relative to security risk. This decision reflects a broader strategic recalibration in the open source community regarding AI-era security trade-offs.