Resistant AI
Category: AI in Cybersecurity
Resistant AI offers a suite of AI-powered security solutions to protect financial services from fraud, money laundering, and financial crime by analyzing documents, transactions, and user behavior. Resistant AI was founded in 2019. The company is led by Martin Rehak. Based in Prague, Czech Republic. Team size: 113. Total funding raised: ~$53-55M total. Latest round: Series A ($27.6M total - $16.6M Oct 2021 + $11M Jun 2023 extension led by Notion Capital). Key investors include DTCP Growth, Experian, GV (Google Ventures), Notion Capital, Index Ventures, Seedcamp.
- Founded
- 2019
- Headquarters
- Prague, Czech Republic
- Team size
- 113
- Total funding
- ~$53-55M total
Value proposition
To detect and prevent sophisticated and emerging financial threats, such as document forgery, serial fraud, and money laundering, that traditional methods and human review may miss.
Products and solutions
Resistant AI Documents: Detects document forgery, tampering, and AI-generated fakes in real-time for documents like bank statements, invoices, and paystubs., Resistant AI Transactions: Provides continuous transaction monitoring to identify anomalous behavior, prevent fraud, and ensure AML (Anti-Money Laundering) compliance., Resistant AI Defence in Depth: Combines documents, transactions, behaviors, and identities for comprehensive fraud and fincrime prevention throughout the customer lifecycle.
Unique value
Resistant AI's uniqueness lies in its multi-layered approach that goes beyond surface-level checks. It analyzes the entire lifecycle of a customer, from onboarding (document and identity verification) to their ongoing transactions, creating a comprehensive risk profile. Their technology is specifically designed to uncover hidden and coordinated fraud attempts that are often missed by siloed solutions.
Target customer
Financial institutions, including banks, fintech companies, digital lenders, and payment service providers.
Industries served
Financial Services, Fintech, Banking, Lending and Credit, Insurance
Technology advantage
The core technological advantage is their advanced machine learning and computer vision techniques that can identify subtle signs of digital forgery, AI-generated content, and behavioral anomalies. This allows them to detect previously unseen fraud patterns and adapt to new attack vectors, giving their clients a proactive defense against evolving financial crime.
How they differentiate
Resistant AI differentiates itself by using advanced AI and machine learning to protect financial systems not just from known fraud patterns but also from unknown threats and targeted adversarial attacks. They focus on the security of automated systems, including detecting AI-generated document forgeries, protecting customer onboarding processes, and securing payment systems against sophisticated manipulation.
Main competitors
Featurespace, ComplyAdvantage, Quantexa
Key partnerships
Google Cloud: Resistant AI's solutions are built on and integrated with Google Cloud, leveraging its infrastructure and AI capabilities., Experian: A strategic partnership and investment to combine Experian's data with Resistant AI's technology to combat fraud, particularly Authorized Push Payment (APP) fraud., ComplyAdvantage: Partnered to launch an AI-driven transaction monitoring solution to combat fraud and money laundering., Tungsten Automation (formerly Kofax): Integrated to provide secure, end-to-end document processing and fraud detection workflows., Lucinity: Collaborating to deliver advanced AI-powered financial crime prevention solutions by combining behavioral detection with case management.
Notable customers
Dun & Bradstreet, Payoneer, Close Brothers, PennyMac, AXA, Anna Money, Finom, Bank of Valletta
Major milestones
Completed $2.75M Seed round (2020), Raised $27.6M Series A (2021-2023), Secured strategic investment from Experian, Raised $25M Series B (2025), Expanded offices to London and New York, Reached 113 employees across three continents, Verified over 150 million documents, Achieved 100x growth in transaction analyses
Growth metrics
10x increase in ARR, 4x increase in customer base, over 150 million documents verified, 100x increase in transaction analyses, 3x more fraud detected, 90% reduction in manual reviews, 5x faster review speed, less than 20 seconds per document verification
Market positioning
Resistant AI is positioned as a specialized AI-driven security provider for the financial services and fintech industries. It targets risk, compliance, and operations teams with solutions to combat fraud and financial crime that traditional systems may miss, focusing on the integrity of automated decision-making processes.
Geographic focus
Founded in Prague, Czech Republic, with a strong presence in Europe and North America and offices in London, Brussels, and New York to serve key financial markets.
Patents and IP
Specific patent information for Resistant AI is not publicly available. However, the founding team has a strong background in AI and cybersecurity, with the CEO, Martin Rehak, holding several patents in network security and machine learning from his previous ventures.
About Martin Rehak
Martin Rehak is a serial entrepreneur and expert in AI and cybersecurity. Before founding Resistant AI, he was the CEO and founder of Cognitive Security, a cybersecurity company acquired by Cisco in 2013. Following the acquisition, he served as a Director of Research at Cisco, leading a team focused on applying machine learning to network security. He holds a Ph.D. in AI from Czech Technical University in Prague.
Official website: https://resistant.ai/