I'd say "a search engine for finding businesses". As the grandparent post notes, "Google for Business" sounds like the other paid-services (like email & docume

I'd say "a search engine for finding businesses". As the grandparent post notes, "Google for Business" sounds like the other paid-services (like email & document hosting) Google offers to business customers. "Search for business" sounds like it could be an offering allowing businesses to add search-functionality to their own site/systems – a competitor to Swiftype, Algolia, and Google Site Search. (You're not that.) Or maybe, "search for business" could indicate a general-web search engine that's optimized for business/professional-searches – which is a little more like what you're doing, but still not quite as focused as to mean "search that just finds businesses".