SellerPlex

SellerPlex was founded in 2018 by Nate Ginsburg and is a full-service Amazon agency built around seller operations rather than advertising alone. It covers account management, PPC, supply chain, content and listings, bookkeeping, and revenue recovery, which makes it a fit for sellers who want one partner across the backend of the business instead of three specialists to coordinate.

The headline credential is external: AdLabs named SellerPlex its Highest ROAS Agency of 2025, ranking it first for return on ad spend. Alongside that, the agency reports more than $2.8M recovered for clients through reimbursements and revenue recovery work, over 100 brands served, and a Trustpilot rating of 4.4 ("Excellent"). The agency also reports 60+ active clients, all on month to month terms with no long-term contracts. Those client-count and contract details come from the agency directly rather than published material, and are reported here as stated.

Pricing is published, which is uncommon in this directory. The stated structure is $2,500 per month plus 5% of sales above the client's baseline, so the fee scales with incremental growth rather than with total revenue. The baseline is set at the start of the engagement, meaning the performance slice is charged on the sales added during the engagement, not on the business the brand already had.

The operational scope is the reason to shortlist them. Supply chain management, bookkeeping and reimbursement recovery sit next to the advertising and listing work, so inventory positions, landed costs and recovered funds land in the same reporting as ad spend. For brands whose profit problem is operational rather than a traffic problem, that combination matters more than another PPC audit.