Typically single- or multi-product SaaS businesses, largely selling B2B software on a low-touch model with a 3~5 column pricing grid at prices between $29 and $

Typically single- or multi-product SaaS businesses, largely selling B2B software on a low-touch model with a 3~5 column pricing grid at prices between $29 and $499 a month, sometimes with a side of infoproducts (e-books, courses delivered online, etc). As to what the SaaSes do, "fixes 'boring' business problems" covers most of them.