4Seller vs Linnworks

4Seller has no write-up on Specifiction yet; its figures are above.

Linnworks is web-based software for managing inventory, orders, listings, warehouses, and shipping across sales channels. It connects businesses to more than 100 marketplaces, with native integrations including Amazon, eBay, Walmart, Shopify, and TikTok Shop; further connections are available through its partner network and app store. Sales update stock across connected channels, while rules-based automation can select carriers, create labels, and route orders. Teams can manage their own warehouses, 3PL providers, or dropship suppliers, and create or update marketplace listings. The system includes inventory and order synchronization, multi-warehouse support, pick-and-pack workflows, shipment handoff, and returns workflows. Reporting provides channel- and SKU-level performance visibility. Linnworks is designed for operations teams and uses guided configuration rather than custom code. It runs on the web. Pricing depends on order volume and required features, not channel count, and customers must contact Linnworks for an operation-specific quote. Setup can take 30–40 days, depending on operational complexity.