How many carriers should a building materials shipper quote?

Key Takeaways

Size the pool lane by lane, not company-wide. A flatbed lane to a job site and a regular dry van lane need different carrier pools.
Start from the approved list. Only carriers vetted for insurance, safety and service belong in a quote request, however good their price looks.
Every added carrier adds follow-up. For most teams, the real limit on pool size is the time it takes to chase and compare replies.
Stop adding carriers when new ones no longer change the decision. If extra quotes rarely win, or win and then fail on service, the pool is already wide enough.
Wilson, by Cartage, is an AI logistics agent that requests, compares and negotiates quotes from approved carriers, so the pool can be sized by lane coverage instead of coordinator capacity.

So how many carriers is the right number?

A building materials shipper should quote enough approved carriers on each lane to get real price competition and a dependable backup, and stop when another carrier no longer changes which load gets booked or at what rate. That number is set per lane, by equipment, geography and how often you ship it, not by a single company-wide rule.

The temptation is to think more is always better. More quotes do widen the price range, but they also create more requests, reminders and comparisons. And the cheapest reply often comes from the carrier you know least.

What decides how broad the carrier pool should be?

Three things set the pool for a given lane: who's approved, who actually covers it, and how much follow-up your team can absorb.

The approved list. A carrier belongs in a quote request only after someone has checked its insurance, safety record and service history. Quoting a carrier you wouldn't book wastes its time and yours, and in a rush it tempts someone to book it anyway.

Coverage by lane. Building materials freight is uneven. Lumber and panels often need flatbed or conestoga equipment; smaller orders move LTL (less-than-truckload); deliveries to job sites may need a liftgate or have limited receiving hours. A carrier that's approved but never runs your equipment or region adds a request and returns nothing useful.

Follow-up load. Each carrier in the pool means one more request, one more reminder when it doesn't answer and one more quote to normalize, since carriers quote in different formats and include different accessorials (charges beyond the base rate, such as liftgate or redelivery fees).

How should the pool differ from one lane to the next?

Match the pool to the lane's situation. The table below is a general framework your team can adapt.

Lane situation	Pool approach	What to watch
Regular, high-volume lane	A core group with proven service, plus a challenger now and then	Whether the core carriers' rates drift above lane benchmarks
Occasional lane or new delivery location	A wider pool from the approved list	Response rates; many carriers won't quote unfamiliar lanes
Specialized equipment (flatbed, conestoga)	Only approved carriers that run that equipment	Thin coverage; approve backups before you need them
Urgent or same-day load	Carriers with a record of accepting tenders quickly	Acceptance, not just price

The point of the table isn't a count. It's that a pool tuned to one lane can be wrong for the next, and a single "always quote X carriers" rule usually ends up too narrow on hard lanes and too wide on easy ones.

When do more carriers stop helping?

More carriers stop helping when the extra quotes no longer change who you book or what you pay. A few signals show you’ve reached that point:

Added carriers rarely win. If the same few carriers take most of a lane’s loads, new quotes are mostly noise.
The low quote isn’t the real cost. A rate that leaves out accessorials can look best and end up most expensive. Review accessorials against the shipment details before you approve a rate, so the decision uses the full expected cost. See why the cheapest quote can leave out accessorials.
Winners decline the tender. A carrier that quotes low and then won’t accept the load (the tender, the formal offer of the shipment) costs you time on the rebook.
Replies arrive after you’ve booked. Late quotes can’t affect the decision.
Carriers stop answering. Carriers that quote often and never win tend to respond less, which shrinks your real pool without anyone noticing.

The fix isn’t always fewer carriers. Sometimes it’s quoting the right ones per lane and dropping the rest from that lane only. Why the lowest carrier quote shouldn’t always win goes deeper on that trade-off.

How does Wilson, by Cartage, handle quoting across a broad carrier base?

Wilson, by Cartage, is an AI logistics agent that executes freight coordination from quote to payment. Traditional logistics software gives teams information. Wilson executes the work required to move shipments forward.

On quoting, Wilson:

Requests and compares quotes from approved carriers, and tenders the company’s own carriers first. Cartage can introduce carriers from its network, and they’re available to Wilson only after the company approves them.
Negotiates against the company’s targets and books the best option, under the rules and approval limits the company sets.
Reaches carriers by email, phone or API, plus EDI where the carrier supports it.
Moves to the next approved option when a carrier declines a tender, and escalates to the team if no approved carrier accepts.
Scores every carrier on service and cost and benchmarks rates by lane, using the data from the shipments it runs.

That last point is what turns pool size into an informed decision. With scorecards and lane benchmarks, the team can see which carriers win, which ones decline and where rates sit, then widen or trim the pool lane by lane. How a carrier scorecard should shape the next load assignment covers how to use them.

What a broad pool looks like in practice

Since May 2026, Wilson has handled 4,230 carrier quotes from 67 carriers for one wood products company. That breadth is workable because sending requests, following up on silent carriers and comparing replies isn’t sitting on a coordinator’s desk. The constraint moves back to where it belongs: which carriers the company has approved and which ones actually cover each lane.

The question to settle for each lane

Before you add or drop a carrier, ask one thing: would this carrier's quote change the booking decision on this lane often enough to justify the follow-up? If yes, keep it in the pool. If no, remove it from that lane and keep it for lanes where it competes. To test this on your own freight, bring your current approved list and two hard lanes to a working session with our team.

Sources