The post was pretty vague on the criteria used for inclusion on this list. From how many possible startups was this list whittled down? What specifically about each company got them put on the list? Are there any conflicts of interest to disclose? Are any of these 15 companies founded by people who are friends of the author? etc.
All of the Mattermark rankings are done by Mattermark's "propitiatory algorithm."
Additionally, Mattermark is technically YC S12 and has received funding from VCs, so there are potential conflicts of interest for any of their rankings, especially taken together with the first point.
