Straiker, an agentic security firm purpose-built to protect AI agents operating inside enterprise environments, has closed a $64m Series A funding round, lifting its total capital raised to $85m.
The round was co-led by Marathon Management Partners, Citi Ventures, Illuminate Financial and Workday Ventures, with Bain Capital Ventures and Lightspeed both continuing their backing. Gokul Rajaram, founding partner at Marathon, will join the company’s board of directors as part of the deal.
The funding arrives as demand for AI agent security accelerates sharply. Straiker has expanded its run-rate revenue more than 15-fold in under a year, driven by enterprise customers deploying both in-house and third-party agents across sensitive systems. The company counts frontier AI labs and Fortune 500 firms among its clients.
Straiker’s platform addresses three interconnected challenges: identifying which AI agents exist across an enterprise, testing them adversarially before deployment, and monitoring their behaviour in real time to stop threats as they emerge. A shared intelligence layer connects these functions, meaning threats identified during live operations inform pre-deployment testing and vice versa. Early access to attack research from frontier AI labs gives the company visibility into novel threat patterns before they become widespread.
The company was founded by executives with roots in both cybersecurity and AI research. CEO Ankur Shah previously served as SVP and GM of Palo Alto Networks’ Prisma Cloud division, while CTO Sreenath Kurupati led AI and security research at Akamai after the company acquired Cyberfend, a fraud detection startup he founded.
Straiker also operates STAR Labs, a dedicated AI threat research unit. Internal testing by STAR Labs found that 36% of successful attacks on coding agents resulted in remote code execution, while 91% of attacks targeting productivity agents led to silent data exfiltration, with no malware or stolen credentials involved. IDC projects that more than one billion AI agents will be deployed across enterprises by 2029, a 40-fold increase from 2025 levels. The new capital will be directed into product development, STAR Labs research, and global expansion.
Straiker co-founder and CTO Sreenath Kurupati said, “Our uniqueness comes from pairing the industry’s most comprehensive agentic exploit dataset with an AI-native security engine purpose-built for autonomous threats. That foundation allows us to secure the next generation of AI-powered enterprises.”
Straiker co-founder and CEO Ankur Shah said, “Demand is outpacing anything we forecast. This round goes straight into product, our STAR Labs threat research, and the global expansion our enterprise customers are pulling us toward.”
Marathon founding partner Gokul Rajaram said, “Given their scope and autonomy, AI agents need to be treated like first-class citizens. Enterprises need a purpose-built solution given the magnitude of the problem. Straiker will be one of the few companies that define how agents are secured.”
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