Good sellers, in.
Bad actors, out.
Verify business sellers in seconds, catch fraudulent and high-risk merchants before they transact, and monitor your seller base continuously — without slowing down growth.
Trusted by marketplaces and platforms to verify and monitor millions of business sellers.
Marketplaces live and die by supply. But every fraudulent seller you activate damages platform trust, triggers chargebacks, and creates liability your team has to clean up. Manual verification slows activation and kills conversion, but broad rules block legitimate businesses. Middesk lets you build supply fast without letting the wrong sellers in.
The cost of outdated KYB
Of legitimate businesses falsely flagged by broad rules, limiting growth
Hours lost to manual seller verification while supply sits idle
Revenue loss from fraudulent sellers before coordinated rings are detected
From seller activation to platform protection
From a business name or TIN, Middesk generates a complete seller profile in seconds. Auto-approve low-risk sellers, route complex cases to review with context assembled, and use graduated verification to let sellers list immediately while verification runs in the background.
Shell company identification, synthetic business detection, and entity relationship graphs that expose coordinated fraud rings and repeat bad actors operating across multiple accounts. AI agents investigate suspicious patterns and deliver case-ready conclusions before a seller's first transaction clears.
Ownership changes, address updates, registration lapses, and network connections to known fraud tracked automatically across your entire seller base. Risk surfaces between reviews — not after a fraudulent listing or chargeback.
Core marketplace features
Business seller verification
Entity existence, EIN validation, formation date, registration status, and beneficial ownership. All verified in seconds against IRS and Secretary of State records.
Graduated verification
Let sellers list immediately. Verify before first payout. Reduce activation friction without increasing exposure.
Fraud detection
Shell company identification, synthetic business detection, velocity analysis, and entity relationship graphs. Bad actors caught before they transact.
Repeat bad actor detection
Sellers who've been terminated or flagged on other platforms don't get a clean slate on yours. Cross-customer fraud patterns surface their history before you activate them.
AI investigation agents
Verification gaps resolved and fraud signals investigated before cases reach your trust and safety team. Complex sellers arrive pre-investigated with a full evidence chain.
Continuous monitoring
Ownership transfers, registration lapses, and network connections to known fraud tracked automatically. Platform risk managed between reviews.
Connect Middesk to the partners your team already uses
One API. Verify good sellers, stop fraud rings.
Skip the manual review queue. Middesk's API verifies business sellers in seconds, detects shell companies and fraud rings before first transaction, and monitors your seller base continuously — embedded directly in your onboarding and payout flows. Grow supply fast. Keep bad actors out.
