Plainsea

Plainsea is an AI-powered cybersecurity platform revolutionizing penetration testing through continuous, automated service delivery. Founded in 2024 by Marko Simeonov (CEO) and Angel Angelov (CTO), the company emerged from AMATAS, a CREST-certified global MSSP operating across four continents. Backed by Ocean Investments, Plainsea was recognized in The Recursive's 2025 CEE Cybersecurity Report as the only vendor featured in a full executive interview, underscoring its leadership role in Central and Eastern Europe's cybersecurity innovation landscape. The platform serves MSSPs, security teams, and enterprises seeking to transform traditional point-in-time penetration testing into continuous, scalable security validation.