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§ Private Profile · Prague, Hlavni mesto Praha, Czech Republic
Resistant AI is a technology company.
Resistant AI develops artificial intelligence solutions to combat financial crime and fraud, specifically targeting sophisticated adversarial attacks. The company's core products include platforms for detecting document fraud in various file types and enhancing existing transaction monitoring systems with advanced AI capabilities. Its technology employs layered systems designed to adapt and evolve faster than fraudulent activities, providing robust defense mechanisms across the entire customer lifecycle.
The company was founded in 2019 by Martin Rehak, alongside other deep-tech specialists. Rehak, a serial entrepreneur, previously founded Cognitive Security, which was acquired by Cisco, providing a strong pedigree in applying machine learning to cybersecurity challenges. The founding insight centered on the need for proactive AI defenses against increasingly intelligent and adaptive criminal AI, recognizing that traditional fraud detection methods were becoming insufficient.
Resistant AI’s offerings serve a range of clients in financial services, including those involved in merchant onboarding, loan underwriting, tenant screening, insurance claims processing, and anti-money laundering efforts. The company’s mission is to build AI capable of identifying and neutralizing criminal AI, focusing on preventing financial crime at scale. Its forward-looking vision emphasizes continuously refining its adaptive systems to secure financial ecosystems against future manipulation and attacks.
Resistant AI has raised $56.0M across 4 funding rounds.
Resistant AI has raised $56.0M in total across 4 funding rounds.
Resistant AI has raised $56.0M in total across 4 funding rounds.
Resistant AI's investors include Credo Ventures, DTCP, GV, Index Ventures, Market One Capital, Notion Capital, Experian, Chapter One Ventures, First Round Capital, iNovia Capital, NFX, Presto Ventures.
Resistant AI builds AI systems to detect and prevent fraud and financial crime across document workflows, onboarding, transaction monitoring, and model-protection use cases. The company’s focus is on *explainable, forensics-driven* machine learning that spots manipulated documents, identity fraud, and evasive transaction patterns for financial institutions and fintechs[1][3].
High-Level Overview
Resistant AI is a specialist cybersecurity / financial‑crime technology company that builds AI to “catch criminal AI,” focusing on document forensics, identity verification, and transaction‑level anomaly detection for banks, fintechs, lenders and marketplaces[1][3]. Their mission is to protect automated financial systems from fraud and manipulation by delivering explainable, verifiable detection models that reduce false positives and expose fraud rings rather than relying on black‑box scores[1][3]. Key sectors served include fintech, banking, payments, lending, insurance and marketplaces where identity and document fraud and AML/fraud detection are core risks[1][3][4]. The company’s impact on the startup and financial ecosystem is practical: it reduces manual review load, improves onboarding and AML outcomes, and partners with other vendors (e.g., ComplyAdvantage, Tungsten) to embed document‑forensics and transaction monitoring into broader compliance stacks[4][6].
2. Origin Story
Resistant AI was founded in 2019 by a team with deep backgrounds in machine learning, AI and computer security—several founders and early researchers hold PhDs in related fields and the company’s leadership emphasizes prior academic and security experience[5][3]. Early traction included signing customers across fintechs and financial institutions and raising venture backing (notably a $16.6M Series A led by GV/formerly Google Ventures, with Index Ventures, Credo Ventures and Seedcamp participating)[3]. Over time the company expanded product scope (document forensics, identity forensics, transaction monitoring) and partnered with industry vendors to broaden distribution and integrate into enterprise workflows[4][6]. The firm celebrated its fifth anniversary and refreshed its brand in 2024–2025, signaling continued growth and market positioning around document fraud and identity risk[2].
Core Differentiators
Role in the Broader Tech Landscape
Resistant AI is riding several converging trends: increasing automation of financial services (more digital onboarding and automated decisioning), rising sophistication of fraud (including use of AI by criminals), and regulatory pressure on financial firms to improve AML/KYC and reduce false positives. Their timing matters because as more services rely on automated models, adversarial manipulation and document fraud become higher‑impact risks—creating demand for explainable, model‑aware defenses[3][1]. Market forces in their favor include broad fintech adoption, global AML/compliance requirements, and vendor consolidation that favors partners who can add specialized capabilities (document forensics and AI‑driven alert prioritization) into larger stacks[4][6]. By publishing research, partnering with compliance vendors, and focusing on explainability, Resistant AI influences the ecosystem toward more forensic, auditable approaches to fraud detection rather than opaque scoring.
Quick Take & Future Outlook
What’s next: continued productization of identity and document forensics, deeper integrations with transaction‑monitoring and AML platforms, and expansion into adjacent industries that rely on document authenticity (insurance, logistics, marketplaces)[6][4]. Trends that will shape their journey include increasing use of generative AI by fraudsters (raising the bar for detection), regulatory demand for explainability and auditability, and consolidation among fraud‑tech vendors that rewards interoperable, partnership‑friendly solutions[1][3][4]. Over the next few years, Resistant AI is likely to be measured more on enterprise adoption, partner deployments, and the ability to demonstrate sustained reductions in false positives and successful detection of novel fraud patterns—outcomes their messaging and product design already emphasize[1][3].
Quick take: Resistant AI occupies a focused niche—forensic, explainable AI for document and identity fraud within financial services—and its academic/security pedigree, venture backing, and ecosystem partnerships position it to be a key supplier for enterprises needing auditable, effective defences as fraud becomes more automated and sophisticated[3][1][4].
Resistant AI has raised $56.0M across 4 funding rounds. Most recently, it raised $25.0M Series B in October 2025.
| Date | Round | Lead Investors | Other Investors | Status |
|---|---|---|---|---|
| Oct 1, 2025 | $25M Series B | — | Credo Ventures, DTCP, GV, Index Ventures, Market ONE Capital, Notion Capital, Experian | Announced |
| Jun 1, 2023 | $11M Series A | — | Market ONE Capital, Notion Capital | Announced |
| Oct 1, 2021 | $17M Series A | GV | Chapter ONE Ventures, Credo Ventures, DTCP, First Round Capital, Index Ventures, Inovia Capital, NFX, Notion Capital, Presto Ventures, Charlie Songhurst, GUY Podjarny, Jeff Morris, Malin Iulian Stefanescu, ROB MAY, Vlad Ionescu, Seedcamp | Announced |
| Apr 1, 2020 | $3M Seed | Credo Ventures, Index Ventures | Chapter ONE Ventures, First Round Capital, Inovia Capital, NFX, Presto Ventures, Charlie Songhurst, GUY Podjarny, Jeff Morris, Malin Iulian Stefanescu, ROB MAY, Vlad Ionescu, Daniel Dines, Michal Pechoucek, Seedcamp | Announced |