Resistant AI - Fraud Detection
Resistant AI provides AI-powered fraud detection for financial documents, having analyzed over 200 million documents since its 2019 founding. The London-based company raised $55M in Series B funding and employs 163 people.
The growth story
Resistant AI - Fraud Detection grew from 34 to 163 employees between 2021 and 2026, raising $55M along the way, most recently a Series B in October 2025.
About
Resistant AI sells software that detects fraudulent documents like bank statements, IDs, and tax forms in PDFs and images across languages. Its API and drag-and-drop interface return results in under 20 seconds, targeting use cases like loan underwriting, KYC checks, and insurance claims.
The company has processed over 200 million documents, suggesting rapid adoption since its 2019 launch. Its $55M Series B in 2025 indicates strong investor confidence, with backers including Google Ventures and Index Ventures.
Founders and leadership
Engineering is the largest function with 21 employees, suggesting a product-focused organization. The median tenure of 3 years points to stable leadership and workforce retention.
The Resistant AI - Fraud Detection org chart
Martin Rehak (CEO & Founder) leads 54 mapped leaders with 16 direct reports. Click +N to expand a team; names link to the person’s public profile.
Departments, and which ones grew
Headcount by function: Engineering 33 (+57% YoY), Information Technology 20 (+33% YoY), Research 19 (+6% YoY), Sales 16 (+23% YoY), Business Development 16 (+45% YoY), Customer Success and Support 13 (+63% YoY).
Talent flow
The team draws heavily from tech firms like Cisco and Rossum, with Czech Technical University in Prague being the top academic source. Alumni have moved to fraud detection and compliance startups like Xelix and Ethixbase360.
Most common previous employers of Resistant AI - Fraud Detection staff: Cisco (9), Rossum (8), Czech Technical University in Prague (7), Česká spořitelna (5), Avast (4), Cognitive Security s.r.o. (3). Former Resistant AI - Fraud Detection employees most often moved to Xelix (1), Cardamon (YC W25) (1), Ethixbase360 (1), FinScan, an Innovative Systems Solution (1), Apify (1), Footprint (1).
Alumni worth knowing
Web traffic
Traffic mix: 71% direct, 22% search, 1% social, 3% paid.
What this company is made of
Most common skills at Resistant AI - Fraud Detection: Python (Programming Language) (56), Data Analysis (45), English (42), Communication (42), Analytical Skills (41), Business Development (34), Microsoft Excel (34), Project Management (33).
Where the team actually sits
Resistant AI - Fraud Detection people are concentrated in Prague, Czechia (74), England, United Kingdom (14), Prague Metropolitan Area (8), Czechia (7). 3 offices on record.
Search footprint
Resistant AI - Fraud Detection attracts about 1,247 organic search visits a month, traffic worth roughly $9K a month if bought through ads. It gained 432 ranking keywords and lost 359 in the last period.
What employees say
- Compensation
- 4.40 / 5
- Career opportunities
- 4.50 / 5
- Senior management
- 4.50 / 5
- Work-life balance
- 5.00 / 5
Frequently asked
Resistant AI - Fraud Detection has 163 employees as of September 2026.
Resistant AI - Fraud Detection has raised $55M in total, most recently a Series B round in October 2025.
Resistant AI - Fraud Detection was founded in 2019 by Martin Rehak, Jan de Waard, Martin Grill, Karel Bartoš, Lukáš Machlica.
Martin Rehak (CEO & Founder) sits at the top of Resistant AI - Fraud Detection's reporting structure, with 16 direct reports.
The most common previous employers of current Resistant AI - Fraud Detection staff are Cisco (9 people), Rossum (8 people), Czech Technical University in Prague (7 people).
Former Resistant AI - Fraud Detection employees most often move to Xelix (1), Cardamon (YC W25) (1), Ethixbase360 (1).
Resistant AI - Fraud Detection attracts about 1,247 organic search visits a month, worth roughly $9K a month in equivalent ad spend.
The most common skills among Resistant AI - Fraud Detection staff are Python (Programming Language), Data Analysis, English, Communication, Analytical Skills.
Resistant AI - Fraud Detection staff are concentrated in Prague, Czechia (74), England, United Kingdom (14), Prague Metropolitan Area (8).
Resistant AI - Fraud Detection has about 33 people in Engineering, up 57% over the past year, as of September 2026.
Resistant AI - Fraud Detection has about 20 people in Information Technology, up 33% over the past year, as of September 2026.
Computed from 122 current and 42 former Resistant AI - Fraud Detection profiles, as of September 2026. Source: Crustdata.
Build this for any company
Every number on this page came from the Crustdata API. Point the MCP at a company and get the same org chart, alumni list and talent flow in one prompt.