Sum and Substance Ltd.

Sumsub is a full-cycle verification platform specializing in identity verification, regulatory compliance, and fraud prevention. The company's mission is to create a fraud-free and accessible digital world by ensuring secure and seamless digital experiences for users and businesses. Headquartered in London, United Kingdom, at 30 St. Mary Axe, Sumsub also maintains international offices in locations such as Berlin, Miami, Singapore, and Dubai.

Sumsub offers an AI-based platform that provides a comprehensive suite of solutions, including Know Your Customer (KYC) for identity verification, Know Your Business (KYB) for corporate entity checks, transaction monitoring, anti-money laundering (AML) screening, and fraud prevention. Its technology incorporates biometric authentication, liveness detection, and document verification, supporting over 14,000 document types across more than 220 countries, alongside non-document verification methods. The company primarily serves regulated industries such as fintech, cryptocurrency, gaming, trading, transportation, and e-commerce.

Led by CEO and co-founder Andrew Sever, Sumsub has established itself as a prominent player in the verification market, serving over 4,000 clients globally. The company has been recognized as a Leader in Gartner's Magic Quadrant for Identity Verification for two consecutive years (2024 and 2025) and a Strong Performer in The Forrester Wave™: Identity Verification Solutions, Q4 2022. Recent developments include the launch of its Summy AI Copilot in February 2026 to enhance compliance workflows and fraud investigations, and a partnership with MEXC in April 2026 to bolster global compliance. In June 2024, Sumsub significantly expanded its Business Verification (KYB) solution. While the company identified a security incident in early 2026 involving limited access to a support environment via a third-party platform, it clarified that core identity verification systems were not impacted.