Fourthline is an identity verification and fraud detection provider operated by Fourthline B.V. It offers automated KYC identity verification, AML screening and ongoing monitoring, automated re-KYC remediation, configurable fraud detection, digital proof of address and qualified electronic signatures, plus a case review portal and support for investigations and customer due diligence reporting. It serves banks, neobrokers, embedded finance providers, marketplaces and mobility companies that need to onboard customers, and is delivered through a single API integration with documentation and test tooling.
Fourthline is a Dutch company, with legal entity Fourthline B.V., and states that it handles personal data in compliance with the GDPR. It is certified to ISO/IEC 27001:2022. The pages consulted do not name a non-European parent company, nor the regions or providers used to host customer data, and the vendor does not describe a self-hosted or open-source option. A regulated organisation should therefore request hosting locations and sub-processors in the contract. As a Dutch company, EU law applies to the vendor directly.