[Industry Insight] When Competitors Become Suppliers: ThredUp's Move Into Whatnot Seller Services

ThredUp’s recent announcement signals a shift in how established e-commerce players are monetizing their operations. Beyond running live commerce shows from distribution centers, the company is exploring a supplier and logistics partnership model aimed directly at other sellers on the Whatnot platform — blurring the line between competitor and vendor.

What’s Happening

  • ThredUp live commerce expansion: ThredUp announced September 29 that it will operate Whatnot live shopping shows from its Atlanta and Dallas distribution centers.
  • B2B supplier play: More significantly, ThredUp has expressed interest in supplying inventory, curation tools, and logistics services to other Whatnot fashion sellers.
  • Early-stage exploration: The supplier relationship is currently exploratory with no finalized commercial terms published.

Why This Matters for Sellers

This trend reflects a broader shift where large, capital-rich players leverage their existing infrastructure and supplier relationships to offer services to competitors. For smaller sellers, this creates both opportunity and risk:

  • Opportunity: Access to vetted inventory, curation expertise, and established logistics if terms are reasonable.
  • Risk: Dependence on a direct competitor who has visibility into your sourcing, margins, and sales velocity.

How Squatio Helps

When evaluating sourcing partnerships — whether with a competitor-turned-supplier or any new vendor — Prospect (Product Database) lets you research what’s actually selling and at what margins in your category before committing to a supplier relationship. Reveal (Reverse ASIN) also helps you understand the competitive landscape and sourcing patterns of top sellers, giving you context for whether a supplier arrangement strengthens or weakens your position.

If you’ve considered or entered into a supplier relationship with a competitor, what terms or safeguards have you required?

Source: Your Next Supplier Might Be Your Biggest Competitor