Global law firm Dentons has advised London-based Octopus Ventures on a US$23 million Series A financing round of Czech cybersecurity startup ThreatMark, which it led together with US-headquartered Riverside Acceleration Capital.

The round includes a US$15 million investment from Octopus Ventures, one of the largest and most active venture capital investors in the UK and Europe, and Riverside Acceleration Capital (RAC), a US-based growth capital partner to B2B software companies. Springtide Ventures Fund, an investment fund subsidiary of Karel Komarek’s KKCG Group, that is the company’s largest investor to date, also participated in the investment round by providing the remaining US$8 million in the form of a convertible loan.

ThreatMark provides a fraud prevention platform which enables banks and the financial services ecosystem to fight fraud across all digital channels. The platform continuously monitors behavioral, device, threat, and transactional data, detecting deviations that signal potential fraudulent activity in real time. With AI and machine learning capabilities, ThreatMark not only identifies known fraud patterns but also adapts to emerging threats, becoming more effective as it processes and learns from new data.

With this new investment, the company plans to expand market reach, including key regions like the UK and US, accelerate research and development, and enhance solution capabilities.

The Dentons cross-border team was led by Chris Errico, Partner in the Venture Technology and Emerging Growth Companies practice, and included Managing Associate Shaun Altshuller and Associate Amelia Holjencin, all New York based members of the Venture Technology and Emerging Growth Companies practice. The team also included Partner David Šimek and Associates Kateřina Kučerová and Dušan Korbel in Prague.

Chris Errico said “We’re very pleased to have had the opportunity to act for Octopus Ventures as they join ThreatMark to support its vision to become a leader in the fraud prevention space.”

David Šimek added “Our US and Czech teams worked closely together, showcasing the strength of our collaborative approach to complex international transactions and our focus on fostering innovation.”