Document & Biometric Verification

Onboard customers with a hyper-accurate verification flow that's built for conversion.


You need to onboard customers as securely, quickly, and seamlessly as possible, but are up against extensive regulatory requirements.

We offer a proprietary solution with bank-grade document and biometric verification and minimal friction for the user.

Automated onboarding and GDPR-proof biometric verification.

Anti fraud, pro conversion

Document types
Response time
Automatic decision-making
Fraud detection accuracy 
GDPR compliant

Go beyond a simple selfie and document check

Fourthline performs deep analysis on every KYC, checking for authenticity, security features, liveness, and more. Over 210 checks are performed on every document and selfie, resulting in the highest level of fraud detection accuracy. 

90% of checks are performed automatically in the background in real time, ensuring a state-of-the-art user experience. The user is provided with live feedback during the onboarding process, improving first-try conversion rates. 

How it works

Seamless integration

Integrate mobile and web SDKs within weeks:

  • Customizable branding and workflows with choice of brand colors, fonts, logos, and more 

  • Available for iOS, Android and web browsers through our web SDK

  • Seamless UX and onboarding flow built for UX and conversion

  • Localization and configurations in up to eight languages


“Rather than relying on off-the-shelf software, we build our algorithms from scratch and train them directly on data within our domain.”

Sebastian Vater | Head of A.I. - Fourthline

Want to learn more?

Get in touch with one of our compliance experts

Request demo