Resistant AI, a Prague-based RegTech company specialising in AI-powered fraud and financial crime prevention, has raised $25m in a Series B.
The round was led by DTCP, with continued backing from existing investors Experian, GV, and Notion Capital, who have doubled down on their support. The company, which became breakeven in September, plans to use the new funds to strengthen its position as a profitable European AI leader by expanding its document fraud detection and transaction monitoring capabilities into new territories and partnerships. It will also enhance its threat intelligence operations.
Resistant AI develops machine learning models that detect fraud in documents, transactions, and behavioural patterns, integrating seamlessly with clients’ existing risk technology stacks. The firm’s models are designed to improve recall, precision, and contextual decision-making when identifying complex financial crimes such as real-time payment (APP) fraud, synthetic corporate identity fraud, money muling, generative AI document forgery, and sophisticated money laundering schemes.
The funding comes amid a period of rapid transformation in the anti-fraud and RegTech sectors, driven by the emergence of agentic AI systems. Many of these large language model-based tools struggle with quantitative risk analysis and suffer from high hallucination rates, leaving financial institutions vulnerable to fraud and compliance risks. Resistant AI aims to bridge this gap by providing robust fraud detection tools that empower both human teams and AI co-pilots.
According to the company’s threat intelligence research, the Fraud-as-a-Service market is expanding rapidly, with online markets selling more than 160,000 verified accounts from over 3,000 financial institutions. These accounts fuel APP scams that have cost the global economy around $1tn. With regulators increasingly adopting reimbursement rules similar to those introduced by the UK Payment Systems Regulator, the need for advanced AI-driven detection tools is becoming ever more urgent.
Since its Series A round, Resistant AI has seen its annual recurring revenue grow tenfold and its customer base quadruple. The firm’s systems have verified more than 150m documents and analysed transactions at a rate 100 times higher than before, establishing it as a leader in AI-based document fraud detection.
Resistant AI CEO and founder Martin Rehak said, “The financial crime landscape has fundamentally changed with the deployment of LLMs and AI agents in risk prevention settings, and the weaponization of generative AI by fraudsters. Our fraud and fincrime models offer any institution the tools to empower both their human and agentic co-pilots to combat these AI-powered threats at scale. This funding, combined with our near-term path to profitability, allows us to accelerate our mission of protecting the global financial system from increasingly sophisticated criminal networks.”
DTCP Growth partner Michael Rager said, “Resistant AI represents the future of financial crime prevention, with their in-house built multi-model approach to fraud detection marking a paradigm shift in how financial institutions can protect themselves and their customers. We look forward to partnering with Martin and the Resistant AI team to support the business in its next stage of growth.”
The company currently supports a range of global financial institutions, FinTechs, and enterprises, including Dun & Bradstreet, Payoneer, Close Brothers, PennyMac, AXA, Anna Money, Finom, and Bank of Valletta. Resistant AI employs over 100 people across offices in Prague, London, and New York.
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