Tenet Security Raises $6 Million Seed Funding

Tenet Security, founded by Barak Sternberg (CEO) and Nevo Poran (CTO), emerged from stealth on June 17, 2026, with $6 million in seed funding to address runtime security for autonomous AI agents (BusinessWire; SecurityWeek; SiliconANGLE). The round was led by The Westly Group, an early backer of SentinelOne, with MizMaa Ventures participating (BusinessWire). Sternberg and Poran previously built Cisco's AI Defense research team, are Unit 8200 alumni, and prior to Tenet ran Wild Pointer, a cybersecurity company with seven-figure ARR and Fortune 500 customers; both have spoken at DEF CON and Black Hat (SiliconANGLE). Advisers include David Schwed, former CISO at Robinhood, and Rick Scott, former CISO at BNY Mellon (SiliconANGLE).

Tenet's core technology is a patent-pending capability called Agent-side Simulation, which models an agent's probable next actions before they execute against production systems (BusinessWire; SecurityWeek). A lightweight runtime sensor simultaneously observes operating system behavior, network and API calls, and the agent's LLM reasoning (SecurityWeek). If the sensor flags a suspicious trajectory, simulation predicts the next move; if harmful, execution is blocked and a human-readable trace explains the intervention (SecurityWeek; SiliconANGLE). Tenet defines a class of attack called "agentjacking" - malicious content embedded in agent inputs (emails, database records, log entries) that covertly redirects the agent's behavior while staying within its authorized permissions (SecurityWeek; SiliconANGLE). Tenet Threat Labs tested this technique across more than 100 enterprise environments and found thousands of organizations potentially exposed via publicly accessible attack paths, according to the company (SecurityWeek).

Enterprises deploying autonomous agents with access to code repositories, data stores, and business workflows face a gap: traditional security tools raise alarms after events, not before (BusinessWire; SecurityWeek). Tenet claims organizations may be running up to five times more AI agents than their security teams realize (SecurityWeek; SiliconANGLE). Early deployment figures - vendor-reported: one $1B ARR legal-sector enterprise grew from two to 20+ agent deployments over six months with more than 10 attacks blocked, including a critical XSS attempt; a Fortune 1000 deployment had a runaway agent generating tens of thousands of dollars in unnecessary token consumption over a single weekend before it was caught (SecurityWeek; SiliconANGLE). Seed funding targets product development, Tenet Threat Labs expansion, and North American go-to-market growth (FinTech.Global).

• •Whether Tenet's simulation approach scales across heterogeneous agent frameworks and high-volume fleets without unacceptable false positive rates.
• •Independent third-party validation of agentjacking attack-path claims and blocking efficacy, beyond vendor-reported deployment figures.
• •Adoption signals: SOC integration patterns, incident response workflows, and practical utility of trace-based explanations for security analysts.