SEMRush - All-in-one Marketing Toolkit for digital marketing professionals.
cognitiveSEO - The cognitiveSEO tool provides a unique analysis process that delivers Unparalleled Backlink Analysis, Content Audit and Rank Tracking for Every Site.
Ahrefs - Ahrefs is a toolset for SEO and marketing. We have tools for backlink research, organic traffic research, keyword research, content marketing & more. Give Ahrefs a try!
Ubersuggest - Want more traffic? Ubersuggest shows you how to win the game of SEO. Just type in a domain or a keyword to get started.
SE Ranking - All-in-One cloud-based SEO software for agencies, marketing teams and webmasters
Moz Pro - Moz Pro is a PRO version that offers a complete SEO toolset that improves search engine ranking and visibility.