Many different roles exist in the supply chain and in the company you choose to do business with, but it’s helpful to categorize each vendor based on their role and your relationship with them. They can be categorized into 4 types of vendors in the supply chain, and understanding these different types will help you to work more effectively with each of them and ensure that your project stays on track from start to finish. Many businesses also sit on both sides of these relationships — it’s worth understanding the basic difference between vendor and customer roles first.

1) Manufacturers

Manufacturers produce goods from raw materials or components. They’re typically the least substitutable link in the chain — switching manufacturers usually means requalifying a product, which takes time. This makes manufacturer risk (capacity constraints, quality control, financial stability) worth monitoring closely rather than reviewing only at contract renewal.

2) Wholesalers and distributors

Wholesalers buy in bulk from manufacturers and sell on to retailers or other businesses, rarely to end consumers. They add value through logistics, warehousing, and breaking bulk orders into smaller quantities. Because there are usually several wholesalers serving any given market, this layer is often easier to re-source than manufacturing.

3) Retailers

Retailers sell directly to the end customer. In a B2B context, this is the vendor a business actually transacts with day to day — and the one whose service levels and responsiveness have the most visible impact on the buyer’s own operations.

4) Service providers

Service vendors — IT support, logistics, consulting, facilities — don’t move physical goods but are just as critical to running a business. They’re often under-managed compared to product vendors, even though a service failure (a payroll system going down, a logistics partner missing SLAs) can be just as disruptive.

5) Why the distinction matters

Lumping all four types into one vendor management process misses the point: a manufacturer relationship needs supply continuity planning, a service provider relationship needs SLA tracking, and so on. Agilus works with clients to build vendor management frameworks that reflect these differences — categorising vendors by type and criticality rather than treating a raw material manufacturer the same way as a stationery supplier.

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