Asymmetric Security, a cybersecurity startup focused on digital forensics and incident response, has emerged from stealth with $4.2m in funding.
The company raised the investment in an oversubscribed pre-seed funding round led by Susa Ventures, with additional backing from Halcyon Ventures, Overlook Ventures, and a group of angel investors.
Founded in 2025 by a team of alumni from institutions including Oxford, Stanford, Cambridge, RAND, Palo Alto Networks, and CrowdStrike, Asymmetric Security operates out of London and San Francisco and is positioning itself as a specialist in AI-driven cyber investigations.
The company’s platform applies artificial intelligence to automate large parts of the digital forensics and incident response process, aiming to accelerate investigations while reducing the operational burden on security teams. It autonomously collects digital artifacts across email systems, identity platforms, and cloud applications, before analysing the data to reconstruct attacks, generate recommendations, and deliver structured findings to human responders.
According to the company, the new funding will be used primarily to expand its engineering and incident response teams. Asymmetric Security plans to invest in building out its technical capabilities and scaling its workforce to meet growing demand from organisations facing increasingly complex cyber threats.
In the longer term, the startup intends to broaden its scope beyond traditional incident response into areas such as insider threat investigations, ransomware attacks, and nation-state level cyber activity. It is also developing realistic evaluation and benchmarking environments based on real-world attacks, which it says are designed to continuously train and improve its AI systems.
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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