Cybersecurity startup Asymmetric Security today emerged from stealth mode with $4.2 million in an oversubscribed pre‑seed funding round.
The investment round was led by Susa Ventures, with additional support from Halcyon Ventures, Overlook Ventures, and angel investors.
Asymmetric Security was founded in 2025 by alumni from Oxford, Stanford, Cambridge, RAND, Palo Alto Networks, and CrowdStrike, and has offices in London and San Francisco.
The digital forensics and incident response firm leverages AI for automation, accelerating investigations and reducing costs.
Its platform autonomously collects artifacts across email, identity, and cloud applications, analyzes the data points to understand the attack, provides recommendations, and delivers the findings to responders for decisioning on edge cases and risk.
To advance its own capabilities, the company builds realistic evaluations, benchmarks, and learning environments based on real-world attacks.
Asymmetric will use the fresh funding to expand its engineering and incident response teams. In the long term, the company aims to expand its services to insider threat investigations, ransomware, and nation-state attacks.
“As AI progress accelerates toward AGI, the security stakes rise. Autonomous AI attacks are no longer hypothetical, and AI model weight theft is now one of the most consequential security risks facing the West. We exist to accelerate AI cyberdefense and make AI an overwhelming advantage for defenders,” Asymmetric Security co-founder Alexis Carlier said.
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