Act Security Emerges From Stealth With $60 Million to Cut Cloud Attack Surface
Act Security emerged from stealth on July 28, 2026 with $60 million raised across seed and Series A rounds, offering a cloud security platform that reduces access paths exploited by attackers, including those used by AI agents. The company was founded by former Medigate executives, a company sold for $400 million.
Act Security Emerges From Stealth With $60 Million to Cut Cloud Attack Surface
Act Security emerged from stealth on July 28, 2026 with $60 million raised across seed and Series A rounds, launching a cloud security platform designed to reduce the access paths attackers exploit to move through corporate infrastructure, according to reporting from Unite.AI, Axios and SecurityWeek.
Who Founded It and Where the Money Came From
The company was founded in 2025 by members of the team behind Medigate, a medical device cybersecurity startup sold for $400 million, according to CTech. The $20 million seed round was led by Team8 and Bessemer Venture Partners, with participation from Hetz Ventures and Claltech, while the $40 million Series A was led by Notable Capital, joined by Startpoint Capital and the Silicon Valley CISO Investments syndicate.
The Problem Act Says It Solves
According to the company, its platform eliminates the conditions that make certain access paths exploitable, systematically reducing the access surface across cloud infrastructure by enforcing clear boundaries for humans, automated workloads and AI agents. SecurityWeek describes the pitch as an attempt to solve what it calls the patch problem: continuous vulnerability patching can no longer keep up with the volume of exposures, so the strategy shifts to structurally reducing exploitable paths instead of chasing each individual flaw.
Why AI Agents Enter the Equation
Treating AI agents as a separate access category, alongside humans and automated workloads, reflects a growing recognition that autonomous agents now carry credentials and access permissions across corporate infrastructure, an attack surface that barely existed at this scale until recently.
Part of a Larger Wave of AI Security Investment
Act Security's round adds to a broader trend: startups at the intersection of AI and security have already raised $855 million across more than 150 seed rounds this year, a pace on track for a record, according to data compiled by Tech Startups. On that same July 28, Hush Security also announced a $30 million Series A tackling a similar problem, signaling investors already treat access control in the age of AI agents as its own category.
Why It Matters for Brazilian Agencies and SMBs
Even small agencies deploying AI agents for clients, such as chatbots with access to a CRM, calendar or payment system, are creating new non-human access paths that traditional cloud security tools were never designed to govern. The emergence of a funded category specifically aimed at reducing AI agent access signals this kind of control is likely to become a checklist item clients ask for soon. It is worth reviewing today exactly which credentials and permissions each AI agent deployed for a client actually holds, even in informal projects.