Assessment
Resistant AI is used by lenders, mortgage brokers, payment companies, and fintechs that accept bank statements, pay slips, business licenses, and identity documents from applicants. Its document product checks each file for edits, templates, and AI generation and returns a verdict in seconds, with KYB documents verified in under 20 seconds, and its transaction product looks for fraud and money laundering patterns. It is built to run underneath onboarding and underwriting flows and to raise straight-through processing. Pricing is quoted. Its main competitors are SEON, Sardine, Hawk, and Unit21.
Martin Rehák, who sold his earlier security company to Cisco in 2013, founded Resistant AI in Prague in 2019. Customers include Payoneer, Dun & Bradstreet, Close Brothers, PennyMac, AXA, ANNA Money, Finom, and Bank of Valletta. It reached breakeven in September 2025, raised a $25M Series B the following month, and employs more than 100 people.
It fits a team whose fraud arrives as documents. It is a weaker fit for a bank that wants one vendor for sanctions screening, monitoring, and case management.
Rating by criterion
We score each of the eight criteria out of 100.
Sector criteria
Check bank statements, pay slips, licenses, and IDs for edits, templates, and AI generation.
Catch serial fraud across many submissions and flag fraud and laundering patterns in transactions.
Return verdicts into existing onboarding and underwriting workflows to raise straight-through processing.
Support merchant onboarding, KYB, and loan underwriting checks at regulated lenders and payment firms.
Vendor criteria
Run document fraud, transaction monitoring, and threat intelligence as layered defenses.
Integrate through an API, with deployment on AWS and partner channels such as Experian.
Request a quote; no prices are posted.
Expect volume-based contracts set in the proposal.
Against its peers
These are the other companies in KYC, AML and identity, with their ratings.
User comments
These buyer-oriented points draw on Resistant AI’s product pages and its funding announcements.
- Upside
- Upside
- Downside
Where customer reviews couldn't be found, our analysts attempted to give a voice to buyer sentiment, drawing on real information from review sites, forums and product documentation. We omit sites where vendors pay to be featured or pay for a review, plus any review the site flags as incentivized.
Based on: Resistant AI homepage; Resistant AI Series B announcement.
Fact file
| Chief executive | Martin Rehák (founder) |
|---|---|
| Founded | 2019, Prague |
| Products | Document fraud detection and transaction monitoring |
| Customers include | Payoneer, Dun & Bradstreet, and Close Brothers |
| Team | More than 100 people |
Competitive landscape
Fraud detection vendors a lender or payment company would compare with Resistant AI.
Resistant AI: 74
Comparisons
Key leadership
Martin Rehák founded Resistant AI in 2019 and is chief executive. He earlier founded Cognitive Security, which Cisco bought in 2013.
How this review was created
This profile gives our own assessment of Resistant AI to companies selecting a KYC, AML & identity provider. The Fintech Index receives nothing for featuring a firm, for sponsorship, or for advertising, and Resistant AI gave us no payment for the profile.
The rating equals the average of eight criteria, with every criterion running from 0 to 100. Four address buyer needs in this sector, and four address the company together with its commercial terms.
Ratings are our editorial judgment, made from public information: pricing and legal pages, product documentation, compliance disclosures, public reviews and filings. Fact-checking took place on November 12, 2026.
Source pages
- Resistant AI homepage: https://resistant.ai/ (As of November 12, 2026)
- Resistant AI about page: https://resistant.ai/about (As of November 12, 2026)
- Resistant AI Series B announcement, October 2025: https://resistant.ai/blog/resistant-ai-raises-25-million-in-series-b-funding-to-empower-ai-agents-to-fight-fraud-and-fincrime (As of November 12, 2026)
- Tech.eu, Resistant AI Series A, October 2021: https://tech.eu/2021/10/20/pragues-resistant-ai-brings-in-16-6-million-in-gv-led-round/ (As of November 12, 2026)