Sardine Smart KYC + KYB is an identity verification platform that performs customer due diligence during user onboarding. The platform combines traditional Know Your Customer (KYC) and Know Your Business (KYB) verification with device intelligence and behavioral biometrics to detect fraudulent users. The platform supports document verification for driver's licenses, ID cards, and passports with selfie liveness detection that identifies digital replays, prints, masks, and deepfakes. It includes watchlist screening against OFAC, PEP, SDN, and adverse media databases with ongoing monitoring capabilities that alert when existing customers are added to watchlists. For business verification, the platform performs Secretary of State searches, EIN/TIN verifications, Ultimate Beneficial Owner (UBO) screening, and address analysis. It incorporates device fingerprinting, IP geolocation, proxy/VPN detection, remote access tool identification, and behavioral biometrics including typing patterns, mouse movements, and hesitation events. The platform includes pre-built rulesets with granular Customer Identification Program (CIP) rules and a no-code rule editor for custom configurations. It supports flexible onboarding workflows that route users based on initial risk levels and can trigger Enhanced Due Diligence or step-up verification processes. Risk decisioning capabilities automatically approve, decline, or escalate users for manual review. Data enrichment capabilities cover phone numbers, email addresses, Social Security Numbers, mailing addresses, banking history, credit reports, and business information from multiple vendor sources.