The round was led by Index Ventures, with participation from new investor Blackstone Innovations Investments. Greylock, CRV, Spark, and all other existing seed investors also participated in the round. The funding round represents the largest cybersecurity Series A in history and comes just ten months after the company launched from stealth in February 2025. Shardul Shah, Partner at Index Ventures, will join 7AI's board of directors. The new funding brings the total amount raised to $166 million.

7AI customers trust dynamic AI agents to get security work done at scale. The company's AI agents autonomously investigate security alerts, proven in production at Fortune 500 scale, eliminating the work humans shouldn't be doing, so security teams can finally do human work: strategic threat hunting, proactive defense, and the work that actually protects organizations. Founded in 2024 and headquartered in Boston, 7AI is aggressively growing its team across AI Security Engineering and go-to-market roles.