I worked with CanIRank during a trial run subscription, and it was the best SEO tool I've come across. The #1 reason for this, is it doesn't just give you data. In the past, I've seen inconclusive and mysterious SEO data that made it pretty difficult to figure out next steps for my content. CanIRank gives you clear data with step-by-step action plans, actually navigating you, the content manager, toward a brighter SEO future. It diagnoses what areas of your are holding your search engine rankings back, your chances of optimizing your target keywords, and tells you how to market your web site to become a competitor in your online sphere. Review collected by and hosted on G2.com.
I found it time-consuming to deliver all of the action plans, and got lost in some of the tasks. However, the company and brand is arms-wide-open when it comes to assisting customers and answering questions, so I really can't complain. Review collected by and hosted on G2.com.