Harmonic Security builds cybersecurity products that help organizations adopt generative AI safely. The company’s mission is to enable secure, governed use of GenAI across the enterprise, reducing risk while allowing teams to move quickly. Founded by the team behind Digital Shadows, Harmonic operates as a Series A startup backed by Ten Eleven Ventures, In-Q-Tel, and Next47. The company reports product-market fit, dozens of customers, and deployments supporting more than 100,000 end users. Teams are based in San Francisco and London and work primarily in person on high-impact, technically challenging problems. The culture emphasizes high agency, collaboration, and adaptability, with a bias for hands-on execution. Employees work closely with leadership on cross-functional initiatives spanning AI strategy, go-to-market, and operations. Harmonic has been recognized by Gartner as a Cool Vendor and targets organizations navigating the fast-changing security implications of AI adoption.