Asymmetric Security, a cybersecurity startup specialising in digital forensics and incident response, has emerged from stealth following a successful pre-seed raise.
The company secured $4.2m in an oversubscribed funding round led by Susa Ventures, with participation from Halcyon Ventures, Overlook Ventures and a group of angel investors.
Founded in 2025, Asymmetric Security focuses on applying AI-driven automation to digital forensics and incident response, aiming to speed up investigations while significantly reducing the cost and manual effort typically associated with complex cyber incidents.
At the core of the platform is an autonomous system that collects artefacts across email, identity and cloud applications, analysing multiple data points to reconstruct how an attack unfolded. The technology then generates recommendations and delivers clear findings to security teams, helping responders make informed decisions on edge cases and risk scenarios.
The new capital will be used to expand Asymmetric Security’s engineering and incident response teams as it looks to scale its platform and deepen its technical capabilities. Over the longer term, the company plans to broaden its services beyond its current focus to cover insider threat investigations, ransomware incidents and nation-state attacks.
The business also invests heavily in building realistic evaluation environments, benchmarks and learning frameworks based on real-world attacks. These environments are designed to continuously test and improve its AI models, ensuring they reflect the tactics, techniques and procedures seen in modern cyber campaigns.
Asymmetric Security was founded by a team of alumni from Oxford, Stanford and Cambridge, as well as researchers and practitioners with experience at RAND, Palo Alto Networks and CrowdStrike. The company operates across London and San Francisco, reflecting its transatlantic ambitions.
Commenting on the company’s mission, Asymmetric Security co-founder Alexis Carlier said, “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.”
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