Cin7 is inventory and order management rather than a classic ERP, and that is exactly why merchants pick it. Cin7 Core, formerly DEAR Systems, holds products and stock across locations, runs assembly and simple production, drives pick pack ship, syncs to Xero or QuickBooks, and offers a B2B portal. Cin7 Omni adds heavier channel management, 3PL and EDI. Both ship a native Shopify integration.
The usual architecture is clean. Cin7 owns products, stock and price tiers, and pushes them into Shopify. Shopify owns the storefront, the company accounts and the checkout. Orders created in Shopify flow back to Cin7 as sales, and Cin7 takes over allocation, picking and invoicing.
What that architecture does not include is the wholesale buyer who emails a purchase order. Their procurement system spits out a PDF, or somebody exports a spreadsheet, and it lands in a shared inbox. Neither Cin7 nor Shopify reads it. A member of your team does, then types it into Shopify or into Cin7 by hand. LevelOps PDF to Order removes that step and leaves the rest of your stack untouched.