Prague-based RegTech company Resistant AI has successfully raised $25 million in a Series B funding round. The investment was led by DTCP, with continued support from existing investors Experian, GV, and Notion Capital. The company, which achieved breakeven in September, plans to utilize the new capital to enhance its position as a European AI leader by expanding its document fraud detection and transaction monitoring capabilities into new markets and strategic partnerships, while also strengthening its threat intelligence operations.
Resistant AI develops machine learning models designed to detect fraud across documents, transactions, and behavioral patterns. These models integrate with clients’ existing risk technology stacks, aiming to improve recall, precision, and contextual decision-making in identifying complex financial crimes. This includes real-time payment (APP) fraud, synthetic corporate identity fraud, money muling, generative AI document forgery, and sophisticated money laundering schemes.
The funding arrives during a period of significant transformation in the anti-fraud and RegTech sectors, driven by the rise of agentic AI systems. While many large language model-based tools face challenges with quantitative risk analysis and high hallucination rates, potentially leaving financial institutions vulnerable, Resistant AI aims to provide robust fraud detection tools that support both human teams and AI co-pilots. The company’s threat intelligence research indicates a rapidly expanding Fraud-as-a-Service market, with online platforms reportedly selling over 160,000 verified accounts from more than 3,000 financial institutions. These accounts are often used in APP scams, which have incurred global losses estimated at $1 trillion. The increasing adoption of reimbursement rules by regulators, similar to those implemented by the UK Payment Systems Regulator, further emphasizes the urgent need for advanced AI-driven detection solutions.
Since its Series A round, Resistant AI has achieved significant growth, with its annual recurring revenue increasing tenfold and its customer base quadrupling. The firm’s systems have verified over 150 million documents and analyzed transactions at a rate 100 times higher than previously, solidifying its role in AI-based document fraud detection.
Martin Rehak, CEO and founder of Resistant AI, commented on the evolving landscape, stating, “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.”
Michael Rager, Growth Partner at DTCP, expressed enthusiasm for the partnership, noting, “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.”
Resistant AI currently serves a diverse portfolio of global financial institutions, FinTechs, and enterprises. Its client roster includes Dun & Bradstreet, Payoneer, Close Brothers, PennyMac, AXA, Anna Money, Finom, and Bank of Valletta. The company maintains offices in Prague, London, and New York, employing over 100 individuals.
