U.S. AI Agent Security Company Straiker Raises $64 Million in Series A Funding

en.Wedoany.com Reported - AI agent security startup Straiker has completed a $64 million Series A funding round, led by Marathon Management Partners, with participation from Citi Ventures, Illuminate Financial, and Workday Ventures. Existing investors Bain Capital Ventures and Lightspeed also continued to invest. The Mountain View-based company has now raised a total of $85 million.

Straiker positions itself as an "agent security company," primarily addressing the security risks posed by AI agents acting autonomously within enterprise systems. Traditional security tools assume software operates according to fixed rules, but AI agents can reason in real-time and execute non-predefined actions, leaving a gap that conventional defenses struggle to cover.

IDC predicts that by 2029, the number of AI agents within enterprises will exceed 1 billion, roughly 40 times the number in 2025. Reuters reported a typical case this spring: attackers tricked Meta's AI support agent into changing account emails and bypassing two-factor authentication, hijacking over 20,000 Instagram accounts without breaching the core system. Tests by Straiker's research arm, STAR Labs, show that 36% of successful attacks on coding agents lead to remote code execution; for productivity agents, 91% of attacks result in silent data exfiltration, without involving malware or password theft.

Straiker's platform mitigates risks through three steps: discovering active agents within the enterprise network, stress-testing them before deployment to identify flaws, and monitoring in real-time to block attacks. CEO Ankur Shah previously led Palo Alto Networks' Prisma Cloud business, and CTO Sreenath Kurupati led AI and security research at Akamai after it acquired his fraud detection startup Cyberfend.

Since its founding in 2025, Straiker has sold products to frontier AI labs and Fortune 500 companies, with recurring revenue growing over 15 times in less than a year. The funds will be used for product development, expanding the STAR Labs research team, and international market expansion. Marathon's Gokul Rajaram will join the board.

Numerous startups are already entering the AI agent security space, covering areas such as non-human identity management and agent access governance. The main risk for this category is that large security vendors may integrate similar features into their own product suites, but Straiker believes AI agents are unique enough to require specialized security solutions.