A reseller agreement is a legal contract between a B2B SaaS supplier (vendor) and a reseller (distributor or retailer).

This formalized business agreement lays out the rules for the reseller to sell the vendor's software, which includes pricing, territories (where they can sell), minimum sales amounts and marketing guidelines.

A reseller agreement is put in place to protects both partners: the vendor controls how their product is presented and the reseller partner gets a profit margin by marking up the price for customers.