Forum Moderators: skibum
I believe that any of the "affiliate networks" and "affiliate technology providers" (Kowabunga, LinkShare, Performics, AvantLink) could probably do what you want, but probably at GREATER COST than if you participated in their networks.
I know that at least one "Outsourced Program Management" (OPM) company also does this, using (I think) the DirecTrack software, and I assume there are others, too. Try searching for "outsourced program managers" and "affiliate program" on a search engine. But again, you'll probably pay such firms MORE than you'd pay a "network" like ShareASale, and get the same or less service.
Paying affiliates requires a fair amount of effort, which is made MORE difficult and complex if you use a third party to manage the payments -- unless you can consolidate your payments with those of other merchants, using the "network" model.
My advice: explore the cost of using ShareASale, and perhaps some lower-tier networks like ShareResults, ClixGalore, etc.