SAN FRANCISCO: AegisAI raises $36 million in Series A funding to secure enterprises against threats that arrive at machine speed.
Battery Ventures leads the round, with Accel and Foundation Capital participating. Total funding reaches $49 million. The company sits in the fastest-forming budget category in security: protecting organizations as AI agents flood into their workflows.
The timing follows the money. Straiker raised $64 million just five weeks earlier for what it calls agentic security. Enterprise agent adoption exploded through 2026, from ChatGPT Work to Claude Cowork to thousands of homegrown deployments. Every one of those agents holds credentials, touches data, and takes actions no firewall was designed to watch.
The attack surface cuts both ways. AI agents inside a company can be manipulated through prompt injection, poisoned data, or hijacked tool access. Attackers outside now use AI to generate phishing, probe defenses, and adapt in real time. Traditional security tooling, built around human-speed threats and static rules, struggles on both fronts.
Security budgets are responding faster than most software categories. When boards ask what could go wrong with AI deployment, chief information security officers need an answer with a vendor attached. That dynamic has pulled a wave of capital into AI security startups this year, and the investor overlap is telling: Accel backed both AegisAI and Paper on the same day.
Battery’s lead adds enterprise go-to-market muscle to a company that will need it. The security market rewards distribution as much as detection, and incumbents like Palo Alto Networks and CrowdStrike are racing to bolt agent protection onto existing platforms.
The fresh capital funds engineering and enterprise sales expansion. Customer names and revenue figures remain undisclosed.
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