The freight auction playbook

Spot freight auctions are the single highest-leverage tool in a procurement team's kit — and the easiest to design badly. This guide is the design rubric we walk every new customer through. It covers the four decisions you have to make before you run your first auction, and the operational guardrails that keep them honest at scale.

Decision 1 — Reverse vs. sealed-bid

Reverse auctions (visible best-bid in real time) drive faster price discovery but can tip into a race-to-the-bottom that hurts long-term carrier relationships. Sealed-bid auctions are slower but produce more sustainable rates. Our default for spot lanes is reverse. Our default for contracted-lane re-rates is sealed-bid.

Decision 2 — Vendor pool size

Counter-intuitively, more bidders is not always better. Above ~12 bidders per lane, participation drops because carriers assume they won't win. The sweet spot we observe is 6–10 invited carriers per spot auction, scored monthly and rotated.

Decision 3 — Lane-level vs. trip-level

Lane-level auctions (price the route) are operationally simpler. Trip-level auctions (price the specific shipment with its weight, vehicle and timing constraints) extract more value but require carriers to read the indent carefully. Trip-level wins for customers above 200 spot shipments/month. Lane-level wins below that.

Decision 4 — Floor pricing

A published floor price prevents the most aggressive race-to-bottom dynamics but also telegraphs your reservation price. We recommend a private floor — the auction system knows it and rejects bids below it, but bidders don't see the number.

The operational guardrails

• Always close auctions on a deadline, not a target. Open-ended auctions train carriers to wait.
• Publish carrier scorecards monthly. Carriers behave differently when benchmarked.
• Don't auction lanes you can't actually move to a new carrier. Empty auctions destroy trust.
• Keep audit trails on the shipper side. Carriers should never see the shipper's compliance data.