Vendor verification & KYB sourcing · updated 2026-07-14
Verify a vendor is a real, legitimate business before you sign the contract.
Vendor Proof Index maps 4 vendor-verification and KYB service categories to the exact questions a procurement, compliance, or finance buyer should ask before retaining a provider, and pairs each category with a sourced reference to 30 notable real vendors in the space. Buyer education and a direct line to vendors. Not legal, compliance, or investment advice; this site does not itself perform verification.
Process & methodology
What verification actually covers
The categories procurement and compliance buyers search for most, each a buyer checklist rather than a vendor ranking.
Supplier Verification
Confirm a supplier is a real, solvent, sanctions-clear business before the contract is signed, not after.
Know Your Business Verification
The methodology behind KYB: what it checks, why beneficial ownership is the hard part, and which frameworks govern it.
Retain with confidence
Need a verification vendor now?
Submit a procurement-safe scope and the service category you need. We route it toward qualified vendor-verification, KYB, due-diligence, and sanctions-screening vendors, usually within one business day. Procurement support, not legal, compliance, or investment advice.
Scope the need
Use the guide and checklist to define what needs verifying and what evidence you require.
Request vendors
Send a procurement-safe sourcing request. We match it to the right category and route it.
Vet and retain
Use the RFP questions and red-flag list to compare candidates and verify claims directly.
Vendor sourcing
Choosing a verification provider
Background-check services and KYB platform/API selection guides.
Vendor Background Check
When a single vendor relationship is high-stakes enough to warrant a real investigation, not just an automated check.
Vendor Verification
The right vendor-verification provider depends on your volume, risk tolerance, and whether you want an API or a managed service.
Sourced reference
Notable vendor verification & KYB companies
Frequently asked questions
What is Vendor Proof Index?
A procurement-grade reference for buyers who need to source and vet vendor-verification, KYB (Know Your Business), due-diligence, and sanctions-screening providers. Each guide explains what the service covers, what to verify, what to ask in an RFP, and the warning signs to watch, plus a sourced reference to notable real vendors in the space.
Does this site itself verify vendors?
No. Vendor Proof Index is a sourcing directory FOR verification-service providers. It does not itself perform business verification, KYB checks, or sanctions screening, and it does not verify, certify, or vouch for any listed vendor's service quality.
Is this legal or compliance advice?
No. Vendor Proof Index is procurement support and buyer education only. It does not provide legal, compliance, or investment advice, and does not guarantee any vendor is suitable for your program.
How do I source a vendor here?
Use the sourcing request form to submit a procurement-safe scope and the service category you need. We route it toward qualified verification, KYB, due-diligence, and screening vendors. Keep confidential case details out of the request.
Does it cost anything?
The directory, guides, glossary, and vendor reference are free to use. Featured and Verified placements are clearly labeled and never change the editorial content or ordering.
Vendor verification sourcing brief
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Single opt-in. We store only your email to send these updates. See ourprivacy notice. This is procurement information, not legal, compliance, or investment advice.