Cybersecurity Funding OT Security Startup Frenos Raises $1.52 Million The company will use the fresh investment to grow its customer success and AI R&D teams. By Ionut Arghire | July 28, 2026 (9:05 AM ET) Flipboard Reddit Whatsapp Whatsapp Email AI-native OT security startup Frenos today announced raising $1.52 million in a seed funding round extension that brings the total raised by the company to $6.4 million. The new investment round was led by Momenta and Exposition Ventures, with additional support from Riptide Ventures. Frenos will use the new funding to expand its customer success team and to grow its AI R&D. In addition to the fresh funding, the startup launched SAIRA Co-Work, an AI reasoning agent designed to provide evidence-based insights during complex investigations. Founded in 2023, US-based Frenos has built an autonomous operational technology (OT) security assessment platform that continuously validates the security posture of OT systems. The platform uses a digital twin of the customer’s network and SAIRA to run fully simulated penetration tests, validating attack paths, chaining exploits, and prioritizing risks. Advertisement. Scroll to continue reading. According to Frenos, its approach reduces assessment time to minutes, has no downtime impact, requires no additional hardware or scanning, and is risk-free. “Most OT security testing today tells you what’s vulnerable, not what’s defensible. The question that matters is what path takes an attacker from an exposed HMI to a process they can actually disrupt, and almost nobody is testing for that,” said Dragos co-founder and CEO and Frenos advisory board member Robert M. Lee. “Frenos is one of the only teams I’ve seen build a platform that thinks in those terms without putting production at risk to do it. That’s a rare combination, and it’s why I joined the advisory board,” Lee continued. Related: AegisAI Raises $36 Million for AI-Powered Email Security Related: Abstract Raises $25 Million to Expand Composable Security Operations Platform Related: Endpoint Security Firm Glow Launches With $180M in Funding at $1.2B Valuation Related: Neo Emerges From Stealth With $100M to Control and Secure Enterprise AI Software Written By Ionut Arghire Ionut Arghire is an international correspondent for SecurityWeek. Daily Briefing Newsletter Subscribe to the SecurityWeek Email Briefing for the latest cybersecurity threats, trends, and expert insights. 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Webinar: Closing the Exploitation Gap July 22, 2026 Join this live webinar as we explore why exploitation is outpacing remediation, where risk is growing fastest, and what security leaders can do to close the gap before attackers take advantage. Register Virtual Event: CodeSecCon 2026 August 19, 2026 CodeSecCon bridges the gap between dev and security. Discover best practices for secure coding, innovative risk-reduction tools, and safe AI integration to cultivate a true DevSecOps culture. Safely secure your apps! Register People on the Move Barry Childe has joined data sciences tech company Datavault AI as Chief Information Security Officer. John DeSimone, the former CEO of Nightwing, has been named Chief Operating Officer at Everfox. Sectigo has appointed Prem Hareesh as Corporate Chief Technology Officer. More People On The Move Expert Insights Is Patching Dead? Vulnerability Management in the Post-Mythos Era You cannot out-patch a machine that writes a working exploit from a vulnerability description in twenty hours. Stop trying to optimize a game you cannot win. (Danelle Au) When Identity Verification Fails: Lessons from a Real-World SIM Swap and Near Account Takeover Identity confidence changes throughout every interaction and should be reassessed continuously as new risk signals emerge. (Torsten George) Legacy Systems, Real-World Impacts: The Reality of OT Security Legacy systems, safety concerns, and critical infrastructure risks make OT vulnerability disclosure one of cybersecurity's most challenging balancing acts. (Tod Beardsley) The Shift Toward Business-Aligned Risk Management Moving from isolated, technical data to a continuous risk lifecycle can help organizations align security controls with actual business consequences. (Steve Durbin) How to Conduct a Successful Audit of AI-Driven Software Development As AI-generated code becomes commonplace, CISOs need new audit strategies to measure developer practices, govern AI tool usage, and identify software risks before they reach production. (Matias Madou) Flipboard Reddit Whatsapp Whatsapp Email