Tenet Security Raises $6 Million Seed Funding

Tenet Security emerged from stealth with $6 million in seed funding to address runtime security for autonomous AI agents. The round was led by The Westly Group with MizMaa Ventures participating. The company's Agent-side Simulation technology models an agent's likely next actions to pre-emptively block harmful paths, addressing a new attack class called 'agentjacking.'

Tenet Security Raises $6 Million Seed Funding Tenet Security emerged from stealth with $6 million in seed funding to address runtime security for autonomous AI agents. The round was led by The Westly Group - an early backer of SentinelOne - with MizMaa Ventures participating. Founders Barak Sternberg CEO and Nevo Poran CTO previously built Cisco's AI Defense research team; both are Unit 8200 alumni and prior to Tenet ran Wild Pointer, a cybersecurity firm that reached seven-figure ARR with Fortune 500 customers. Tenet's core technology, Agent-side Simulation, models an agent's likely next actions before they execute against production systems and can block harmful paths pre-emptively - addressing "agentjacking," where adversaries redirect agent behavior via poisoned inputs. Funding targets product development, Tenet Threat Labs expansion, and North American go-to-market growth. What happened 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 . Technical details 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 . Context 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 . What to watch - •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. Scoring Rationale A well-sourced launch from credible founders ex-Cisco AI Defense, Unit 8200, Wild Pointer targeting a real and growing gap in enterprise AI agent security. $6M seed is small but the Agent-side Simulation approach is technically specific. Scored as Solid-to-Notable: relevant to practitioners deploying agents, but too early-stage and vendor-reported to rank above mid-tier funding events. Practice interview problems based on real data 1,500+ SQL & Python problems across 15 industry datasets — the exact type of data you work with. Try 250 free problems /problems