Sumsub

Sumsub (legally Sum and Substance Ltd, London-headquartered) is a full-cycle verification platform that bundles KYC, KYB (business verification), AML screening, ongoing monitoring, Travel Rule compliance, transaction monitoring, and fraud/deepfake detection behind a single REST API plus web and mobile SDKs. It targets regulated and high-fraud verticals, crypto exchanges, neobanks/fintech, iGaming, trading, and marketplaces, where one vendor covering document verification (220+ countries, 4,000+ document types), biometric liveness, sanctions/PEP screening (1,400+ watchlists), and proof-of-address is more attractive than stitching together point solutions. Its no-code "Unilink" hosted flows and configurable verification journeys let teams ship without heavy engineering, while the Cockpit dashboard handles case review and manual overrides.

Where Sumsub wins is breadth and conversion-optimized UX: it markets sub-50-second average verification and some of the higher published pass rates in the category (e.g. 91.64% US, 95.86% UK), its liveness is iBeta/ISO-IEC-30107-3 tested, and it has invested heavily in adaptive deepfake and injection-attack detection, increasingly the real battleground in IDV. It is consistently rated a G2 Leader (4.6/5 across ~109 reviews) with strong marks for ease of use and quality of support among B2B buyers. The trade-off is a steep dual reputation: business customers on G2/Capterra rate it highly (Capterra ~4.7/5), while end users who get verified THROUGH Sumsub on behalf of its clients flood Trustpilot with complaints (~1.3/5), citing valid IDs rejected in loops, opaque "forgery" flags, and unreachable support. That end-user friction is partly inherent to being the gatekeeper, but the volume is notable.

For a buyer, Sumsub is a strong default if you want one regulated-grade vendor across KYC+KYB+AML+fraud globally and value conversion and deepfake resilience. The caveats are commercial and operational: pricing starts at a real floor ($149–$299/mo minimums, $1.35–$1.85 per successful check) that is steep for small teams, multiple reviewers report sharp out-of-cycle price increases, and merchant-side support responsiveness draws criticism. Enterprises get white-labeling, SSO, reusable KYC, and a dedicated CSM under custom pricing.