I considered labeling this a "landscape of landscapes" but quickly realized that (a) it's not all that witty and (b) six vendors isn't enough. But on further reflection, I recognized that these landscapes are really a type of directory that helps marketers find available products. This led me to consider other types of online directories, of which there are many. So I did end up producing a landscape that still isn't as crowded as Scott's but does show the number of information sources available.
As you see, this contains four sets of products: the original six landscapes, divided between the static images and the two interactive options (both very cool). In addition, there are two directories with analyst ratings, from Gleanster and TopAlternatives. But the biggest category is the community review sites, of which the best known among marketers are probably G2 Crowd, TrustRadius, and Software Advice. Because the purpose here is to list tools that help marketers find systems to purchase, I didn't extend the landscape to business directories like Crunchbase, VentureBeat's VB Profiles and Owler.
I did look at every vendor shown in the graphic and can affirm that each includes at least some marketing systems. There are some interesting differences in approach but, like any good landscape creator, I'll simply give you a set of logos and let you research from there. Again following the tradition of landscape publishers, I make no claims about the completeness of my list or the quality of any of the companies listed. But I will make your life a bit easier by listing all the links below. Enjoy!
IT Central Station
Software Insider (formerly FindTheBest)