1,200 sellers onboarded without adding a reviewer

Growth that a review queue could not absorb

Kestrel Market’s plan for 2025 was to triple the seller base. The review team read that as a plan to triple the review team, because every new seller went through the same manual check: identity, insurance, data handling, and a security questionnaire that took a reviewer forty minutes to read whether the seller shipped bearings or handled buyer payment data.

Four people were already fully occupied by 390 sellers a year. Nobody could explain why a bearings supplier with no platform integration needed the same forty minutes as a logistics partner with API access to order data.

Tiering by what the seller can actually reach

Sellers are now scored on two axes the platform already knows: what data the integration exposes, and what payment flow the seller sits in. Those produce four tiers.

Tier 4 and tier 3 — the great majority — clear automatically against registry checks, an insurance certificate and a signed attestation. They are onboarded in minutes and re-checked continuously rather than annually. Tier 2 and tier 1 reach a human, and that human now has a queue of about a quarter of the sellers, holding all of the risk.

“The reviewers did not get faster. They stopped reading the 71% that never needed reading.”

Eighteen months in

• 1,200 sellers onboarded against 390 the year before, with the same four reviewers.
• 71% cleared the automated tier. Of those, nine were later pulled up a tier by continuous monitoring — an expired insurance certificate in seven cases, a changed sub-processor in two.
• Time-to-first-listing for a tier 4 seller went from eleven days to under an hour, which turned out to matter more to the commercial team than any of the security numbers.

What’s next

The tiering model is being extended to cover sellers who add an API integration after onboarding — today that is a manual re-review, and it is the one path that still routes by whoever picks up the ticket.