MX

MX operates in the open finance infrastructure layer, building systems that connect, normalize, and secure financial data flows between consumers, financial institutions, and fintechs. Founded in 2010 and headquartered in Lehi, Utah, the company provides the plumbing behind account aggregation, instant account verification, and transaction categorization - domains where data integrity and credential security are non-negotiable. The threat surface is substantial: MX connects to over 1,800 financial institutions and partners with 43 of the top 50 digital banking providers, processing over $170 billion in transactions. The technical stack spans financial data connectivity, data intelligence, and mobile banking solutions. Products like Account Aggregation and Instant Account Verification handle the high-risk handoffs between third-party APIs and end-user applications - precisely the attack vectors where credential stuffing, token leakage, and session hijacking converge. MX's role as an intermediary means its security posture directly affects the credential chain for millions of consumers across thousands of institutions. With 501–1,000 employees, the company operates at a scale where security engineering can't be bolted on - it has to be architectural. Teams working on these systems face the classic fintech security tradeoffs: balancing real-time data access with least-privilege credential management, building fraud detection into verification flows, and maintaining encrypted data pipelines across a fragmented API landscape where every bank's integration behaves differently.