Kostas Siabanis
Co-founder & co-CEO, Business & Growth, Humanbound
Co-founder of Humanbound, an AI security testing platform helping enterprises secure their AI agents. Based in Athens, Greece.
Posts by Kostas Siabanis
Your Agent Passed Its Security Test. That Was Three Weeks Ago.
The security industry is applying shift-left to AI agents. But AI agents aren't deterministic. The gap between testing on deploy and staying secure in production is where risk accumulates.
The Enforcement Illusion: Why AI Agent Security Starts with Testing, Not Walls
The AI agent security market is fragmenting into enforcement, identity, and control plane vendors. But the incident data tells a different story: most agents ship without any adversarial testing at all.
Claude Code Security Found the Bugs. The Agents Are Next.
Claude Code Security didn’t kill security tooling—but it did signal that frontier AI labs are now security providers, and that our current models don’t cover the behavioral, contextual, and systemic risks of autonomous agents. This is where security needs to go next.
Shadow AI: The Gap Your CISO Dashboard Doesn’t Show
Your CISO dashboard tracks vulnerabilities across infrastructure, apps, and cloud—but may miss the fastest-growing risk surface: Shadow AI. See how it shows up, why legacy tools miss it, and how Humanbound reveals AI use in a governed, continuously monitored registry.