Tenet Security
Category: AI in Cybersecurity
Tenet Security provides runtime security for enterprise AI agents, using agent-side simulation to predict and prevent malicious agent behavior before execution. Tenet Security was founded in 2025. The company is led by Barak Sternberg. Based in New York City, USA (originated in Tel Aviv, Israel). Team size: 11-50. Total funding raised: $6M. Latest round: Seed. Key investors include The Westly Group, MizMaa Ventures, Tomer Schwartz (founder of Dazz), Lior Tal (former CEO of Coralogix).
- Founded
- 2025
- Headquarters
- New York City, USA (originated in Tel Aviv, Israel)
- Team size
- 11-50
- Total funding
- $6M
Value proposition
Predictable security for unpredictable AI agents — the industry's first runtime agent defense layer that discovers, investigates, and protects autonomous agents in real time, stopping attacks before they execute rather than just monitoring for them after the fact.
Products and solutions
AI Agent Security Platform: Discover (agent risk assessment in under 3 hours), Detect & Investigate (AI Detection & Response for agentic misuse), Protect (real-time agentjacking prevention), Manage (unified agent risk control across endpoint/cloud), Validate (agent security testing against OWASP Top-10 for Agents and MITRE ATLAS), Agent-Side Simulation™ (patent-pending predictive defense), Tenet Threat Labs (research and threat intelligence)
Unique value
Agent-Side Simulation™ predicts what agents will do next before they execute; stops agentjacking and attacks at runtime with zero-friction deployment; provides visibility into the 5x more agents running than security teams realize
Target customer
Enterprise security teams deploying AI agents in production — particularly in legal, financial services, healthcare, and Fortune 1000 organizations
Industries served
Financial Services, Legal, Healthcare, Technology/Enterprise SaaS
Technology advantage
Patent-pending Agent-Side Simulation™; lightweight runtime sensor simultaneously observing OS behavior, network/API calls, and LLM reasoning; built by former Cisco AI Defense researchers with deep offensive security backgrounds (Unit 8200, Israel Defense Prize recipients); first to discover and research "Agentjacking" attack class validated across 100+ enterprise environments
How they differentiate
Unlike legacy security tools that passively monitor prompts or rely on hardcoded rules, Tenet is a runtime agent defense layer that sits on endpoints and intercepts every tool call and execution path, simulating outcomes in a parallel reality and killing hijacked logic before it touches infrastructure. No proxies, gateways, or runtime friction required.
Main competitors
Lakera (acquired by Check Point), Mindgard, Prompt Security, Protect AI, HiddenLayer, Cisco AI Defense
Key partnerships
Advisors: David Schwed (ex-CISO Robinhood), Rick Scott (ex-CISO BNY Mellon), Ken Huang (OWASP AIVSS Lead)
Notable customers
$1B+ ARR legal-sector enterprise (expanded from 2 to 20+ agent deployments), Fortune 1000 enterprise (identified runaway agent costing tens of thousands in token consumption), enterprises serving 10M+ users in the US, F500 financial services company
Major milestones
June 2026: Emerged from stealth with $6M seed led by The Westly Group, Discovered "Agentjacking" attack class validated across 100+ enterprise environments, Won 2 Gold Cybersecurity Excellence Awards and Hot Company in GenAI Security at InfoSec Awards, Deployed in Fortune 500 environments, Identified 7,000+ automated attack attempts and neutralized Shadow Behaviors in a single quarter
Market positioning
Early-mover in the emerging agent-security sub-segment, positioning as the runtime defense layer specifically built for autonomous AI agents — differentiated from general AI security platforms by focusing on agent behavior at runtime rather than prompt monitoring or model security
Geographic focus
North America (US HQ); Israel (R&D origination)
Patents and IP
Patent-pending Agent-Side Simulation™ technology
About Barak Sternberg
Ex-Cisco AI Defense researcher; Founder/CEO of Wild Pointer (cybersecurity, $2M+ ARR, Fortune 500 customers); Senior Security Researcher at SentinelOne; Unit 8200 Veteran (Cpt. Res) & Israel Defense Prize recipient; Tel Aviv University; BlackHat/DEFCON speaker
Official website: https://www.tenetsecurity.ai