CyberRidge develops photonic-layer security (PLS) solutions designed to protect data-in-transit from quantum computing threats. The company's flagship product, Carmel, operates at the optical layer to prevent Harvest-Now-Decrypt-Later attacks by making data unrecordable rather than relying solely on encryption algorithms. The technology works by manipulating light at the physical layer, spreading signals over a wide optical spectrum, burying data below optical noise, and continuously changing optical keys within fractions of a second. This approach makes intercepted data unharvestable, providing protection against both current and future quantum computing capabilities. The key distribution is embedded within the signal itself in an air-gapped environment, and metadata remains unexposed. CyberRidge's solution supports high-speed optical transmission at 100G+ speeds with zero latency and no link length limitations. The system is designed as a plug-and-play replacement for transmission line cards in existing optical infrastructure, allowing organizations to become post-quantum ready within weeks without requiring extensive network overhauls. The company has raised $26 million in total funding and has been recognized as a Gartner Cool Vendor in Data Security. CyberRidge works with telecommunications providers, defense contractors, and enterprises requiring quantum-resilient protection for sensitive data transmitted over optical networks. The solution is energy-efficient and integrates into legacy networks without imposing distance restrictions or amplification vulnerabilities.