Best 3PL for Amazon Sellers 2026

AMZ Prep is the most Amazon-native pick on this list. It is built around the FBA prep workflow Amazon just stopped doing for sellers. Item-level prep starts at $0.40/unit with FNSKU labeling and polybagging included, case forwarding runs $1.50/box, and the company consolidates inventory onto dedicated daily truck routes into Amazon fulfillment centers, which is how it charges no placement fees on FBA shipments. The same account also runs SFP and DTC, so an Amazon-first brand can consolidate every fulfillment model with one partner. It is our highest-rated Amazon specialist at 4.4 overall. The tradeoff is that its center of gravity is the marketplace, not DTC, and it wants 300 orders a month to start.

Seller Fulfilled Prime depends on sustained delivery performance, and Amazon's current on-time delivery requirement is 93.5%. Red Stag's 100% order-accuracy guarantee, $50 paid per mis-pick or mis-ship, and $50 paid for a missed shipping deadline provide the strongest accountability in this lineup. It also specializes in heavy and oversized goods that face higher FBA costs. Red Stag has the highest overall directory rating here at 4.5. The tradeoff is reach: it operates two hubs rather than a national grid, so sellers should confirm delivery-speed coverage for their Prime zones.

MyFBAPrep is the pick when scale is the constraint. It coordinates a network it puts at 100+ warehouses and roughly 85M sq ft across the US, Canada, Mexico, the UK, Europe, and Australia, aimed at top-volume Amazon sellers, aggregators, and enterprise brands. Prep runs on a published tiered rate, $0.95/unit at 5,000 units a month dropping to $0.50 at 50,000, with a 24–72 hour turnaround and a stated 99%+ on-time target on Seller Fulfilled Prime and FBM, all tracked in its proprietary Preptopia platform. At 4.3 overall it is the strongest pure-prep operation here. The catch is the floor: a 5,000-unit monthly minimum and quote-only pricing beyond prep put it out of reach for small sellers.

ShipBob is the strongest pick for a brand whose primary channel is its own Shopify store but that also sends inventory into FBA. Its FBA prep program connects directly to Seller Central and automates shipping plans plus box, pallet, and shipping labels from the same dashboard that runs DTC. ShipBob can also book freight or parcel for the shipment. Its 4.0 directory rating reflects a strong DTC operation rather than an Amazon specialist. The main limit is Prime: ShipBob supports FBM but says it does not fulfill Amazon Prime orders, so it is not an SFP option.

ShipCalm's edge is continuity. It handles Amazon-compliant prep and merchant-fulfilled orders, giving sellers an FBM option when FBA inventory runs low. It also publishes a detailed rate card, which most prep providers do not, and supports retail compliance, EDI, and kitting for brands selling across Amazon, retail, and DTC. ShipCalm rates 4.2 overall and operates from two current fulfillment locations. It is not a heavy-freight specialist, but it is a strong fit for brands that want published pricing with prep and FBM under one provider.

ShipMonk is the software-first option for a brand that treats Amazon as one channel among several. Its platform handles FBA prep, SFP, and DTC across Amazon, Shopify, and Walmart from a shared inventory pool, with the integration depth to keep marketplace listings in sync. That makes it a fit for growth-stage sellers diversifying beyond Amazon. Its 3.8 is the lowest overall rating on this list, pulled down by customer-service consistency. Watch the itemized billing and confirm service levels for your volume tier before you sign.

Cart.com fits brands for which Amazon is one large channel inside a broader marketplace, retail, and DTC operation. It supports those channels from shared inventory across a 17-facility U.S. network, with enterprise software and retail-compliance capabilities for mid-market and larger brands. Cart.com also raised $180 million in March 2026. It rates 4.1 overall and publishes support for FBA prep, FBM, and SFP requirements. For an Amazon-only or early-stage seller, the platform is likely more than the job requires.

Selery is the approachable pick for smaller Amazon sellers who want a human on the account and a bill they can read. It handles FBA prep and DTC, publishes starting per-order rates by volume tier, and offers the kind of hands-on service that larger networks reserve for enterprise tiers. It rates 4.0 overall. Final rates still come by quote, and it is not built for heavy freight or enterprise-scale throughput, but for an SMB Amazon brand it removes most of the guesswork.

Cahoot is the cost-first answer to Seller Fulfilled Prime. Its peer-to-peer network routes each order to the lowest-cost member location that still hits Amazon's delivery promise, so a seller can hold the Prime badge without paying FBA fees. Cahoot claims 30% lower cost on average, though its own FAQ ties the real saving to your carrier mix, order volume, and package size. Merchants sitting on spare warehouse space can also join the network as fulfillment partners and get paid monthly for shipping other members' orders. At 4.3 it ties MyFBAPrep for the second-highest rating here, even though it lands at number nine on Amazon fit. The tradeoffs are quote-only pricing and execution that varies by partner warehouse, so it suits sellers optimizing SFP cost more than those who want a hard accuracy guarantee.