How to Choose a 3PL for Amazon FBM
The right 3PL makes FBM competitive with FBA on speed. Here is what to look for, the red flags to avoid, and how to run FBA and FBM together.
2026-07-30
What a 3PL does for FBM
On FBM you are responsible for fulfillment, and a 3PL is who actually runs it: storing your inventory, then picking, packing and shipping each order to your buyer. A good order fulfillment partner lets you keep FBM control of branding and margin without operating a warehouse yourself.
What to look for
Prioritize a US location close to major carriers, real integration with your store or marketplace, shipping speed that meets Amazon's delivery expectations, real-time inventory visibility, and flexible terms with no long lock-in. These are what let FBM compete with FBA on the metrics buyers actually see.
Red flags to avoid
Be wary of long mandatory contracts, no inventory visibility, slow onboarding and unclear or hidden per-order fees. If you cannot get a straight answer on pricing or turnaround times, that is a signal. A partner that hides these usually costs more later.
Run FBA and FBM together
The strongest setup often uses both: FBA for fast movers, FBM through a 3PL for everything else and as a backup when FBA runs dry. Our FBA vs FBM guide breaks down the split. To map it to your catalog, contact us.
FAQ
Do I need a 3PL for FBM?
Not strictly, but a 3PL lets you offer fast, reliable shipping on FBM without running your own warehouse, which is what keeps FBM competitive with FBA.
Can a 3PL help me meet Prime-level speed?
A 3PL located near major US carriers can ship quickly enough to meet buyer expectations, and it is a prerequisite for programs like Seller Fulfilled Prime.
How long does onboarding a 3PL take?
A good partner integrates with your store and starts receiving inventory quickly, often within days. Slow onboarding is itself a warning sign.