SpyFu is the eponymous SEO and PPC research platform from the company in Scottsdale, Arizona focused on "spying" on competitors, or basically using their behaviors to refine your own through keyword and content analysis, and backlink poaching. This positional search engine optimization and paid listings management platform touts the ability to lower costs and raise rankings via a Kombat-oriented approach... basically a cute way of saying "it makes comparisons" of how well your site does in niche keyword areas vis-a-vis rival actors in the same or contiguous marketing space.