Plainsea

Plainsea is a cybersecurity platform focused on agentic penetration testing and continuous exposure validation. The platform is designed to address what the company describes as the "exposure gap" — the lag between when new attack surface is created and when it is tested. The platform serves two primary audiences: - Organization security teams: Internal security teams can define testing scope and boundaries, after which the platform autonomously executes offensive testing, delivers confirmed findings, and generates audit-ready documentation. No offensive security expertise is required from the user. - Professional penetration testers: Security consultants can manage multiple client engagements from a single platform, standardizing scope, execution, evidence collection, and reporting across their portfolio. Core capabilities of the platform include: - Agentic AI execution: Autonomous reasoning that chains multi-step attack paths and adapts based on discovered findings, mimicking the depth of manual penetration testing. - Continuous or scheduled testing: Targets are defined once and the platform runs penetration tests continuously or on a defined schedule. - Human-in-the-loop controls: Critical decisions require human operator validation before execution proceeds, operating within a defined safety envelope. - Remediation verification: The platform re-tests after fixes are applied to confirm that vulnerabilities have been closed. - Standardized reporting: Generates technical documentation and evidence trails suitable for board, regulatory, and audit requirements. The platform addresses attack surface areas including supply chain dependencies, business logic flaws, distributed application vulnerabilities, and AI-generated code. Plainsea positions itself as an alternative to traditional scheduled penetration testing engagements and automated vulnerability scanners.