Fourthline
Raise the standards of identity verification
219 employees · est. 2017 · Amsterdam, The Netherlands
Middesk
Middesk is business identity intelligence: decision-ready insights on every business from onboarding through monitoring.
144 employees · est. 2019 · San Francisco, United States
Fourthline is the older company (2017 vs 2019); Fourthline is the larger of the two.
Side-by-Side Comparison
| Metric | Fourthline | Middesk |
|---|---|---|
| Founded | ||
| Founded | 2017 older | 2019 |
| Headquarters | ||
| Headquarters | Amsterdam, The Netherlands | San Francisco, United States |
| Employees | ||
| Employees | 219 larger | 144 |
| Industry | ||
| Industry | Fintech, RegTech | Enterprise, Enterprise Software, Fintech |
| Funding Stage | ||
| Funding Stage | Unknown | Series B |
| Total Funding | ||
| Total Funding | $64.00M | $77.00M |
| Funding Rounds | ||
| Funding Rounds | 3 | 3 |
| Services | ||
| Services | Identity Verification, AML Screening & Monitoring, Fraud Detection, Client Authentication, Re-KYC & Remediation, Investigations & CDD Reporting, Case Review Portal | Verification, Underwriting, Fraud Prevention, Business Registration |
| Target Customers | ||
| Target Customers | Banks, Neobanks, Neobrokers, Marketplaces, Embedded Finance, Mobility | Banks, Lenders, Fintechs, Platforms, Marketplaces |
| Taxonomy | ||
| Taxonomy | Identity Verification, KYC, AML, Fraud Prevention, Compliance Solutions, Customer Lifecycle Management, AI-powered Onboarding, Financial Industry Solutions, Bank-grade Security, Modular Platform, Proprietary Technology, GDPR Compliance, Continuous KYC, Fraud Protection | Business Identity Intelligence, Onboarding Automation, Compliance Solutions, API Integration, Fraud Prevention, B2B Ecosystems, KYB (Know Your Business), AML (Anti-Money Laundering), Fintech Solutions, Business Verification, Customer Insights, Operational Efficiency, Revenue Velocity |
| Website | ||
| Website | fourthline.com | middesk.com |
About Fourthline
Fourthline, established in 2017, is a frontrunner in the Fintech and RegTech industries, headquartered in The Netherlands. The company positions itself to "Raise the standards of identity verification" by transforming compliance into a competitive edge for businesses. Fourthline offers comprehensiv...
About Middesk
Middesk, founded in 2019 and headquartered in the United States, is an innovative player in the Enterprise and Fintech sectors. The company is reshaping the landscape of business identity intelligence with a compelling offering that leverages infrastructure and APIs to provide decision-ready insight...
We will tell you when either one moves
BounceWatch watches Fourthline and Middesk for new funding, fast hiring, new executives and a change of software vendor. When one happens, we email you the same day.
Funding, hiring, leadership and stack changes at Fourthline and Middesk — by email.
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Compiled from the BounceWatch company index. We last looked at Fourthline on 22 Jun 2026, and Middesk on 1 Apr 2026. Where a field is blank here, it means we have not recorded it — not that the answer is zero. How we source and date this.