A reseller partner sells a vendor’s product directly to their client. In contrast to the relationship between affiliate/referral partners who are involved only at the start of the customer’s journey (it gets handed off to the vendor), a reseller partner owns the whole customer relationship.
Resellers are the most complicated partners to work with, and for good reason! They give you access to a relatively limited but highly qualified audience. This is why they often require more support and enablement resources.
Also see: “Affiliate partner”, “Referral partner”
Referral partners send qualified leads for your team to close and earn a percentage of the revenue when a deal goes through. The audience of a referral partner is not as large as that of a marketing partner, but a referral partner typically know more about the people they are referring, often having a direct one-to-one relationship, meaning the leads they send tend to be highly qualified.