Prioritize WMS integration for real-time inventory, SLA metrics for order accuracy and lead times, carrier connectivity to major routes, and value-added services (kitting, returns handling). Also assess peak-season scalability, security, and reporting to ensure the provider supports your fulfillment profile and cost targets.

Proximity to primary highways and consolidated carrier services reduces linehaul costs and transit variability. Shorter regional routes lower fuel and handling fees, enable more predictable delivery windows, and improve options for LTL consolidation versus direct truckload—affecting both speed and unit shipping cost.

Look for a robust WMS with API/EDI connectivity, inventory visibility, multi-client segregation, pick-and-pack efficiency, reverse logistics processes, and the ability to manage temperature-controlled SKUs if required. Integration with carriers and marketplaces is essential for omnichannel order routing.

Compare storage rates, handling fees, minimums, and seasonal surcharges. Negotiate trial periods, service-level credits, and transparent billing for inbound QC, returns, and value-added tasks. Evaluate pooled inventory options and flexible volume clauses to avoid over-committing capacity as demand fluctuates.