Daxon already works with Twentysix on search engine optimisation and web management.
The division is headed by Andrew Chung, formerly a key account manager at leading UK affiliate network Affiliate Window.
Chung will be working closely with Twentysix's search director Ryan Scott, who said: "Affiliate marketing is a rapidly growing channel with a clear synergy with search.
"This is shown in the fact that more and more blue chip clients see the affiliate channel as a vital part of their online marketing mix."