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BackLink Patrol

The Swiss Army knife of content marketing, Ahrefs is a set of SEO tools packaged as a service. With Ahrefs, content marketers SEO's can get detail search engine data about their domains, which can be used to further improve the visibility and reach online. The toolset is powered by AhrefsBot, a web crawler that crawls webpages and provide data to analyze both organic and paid results in search engines. Ahrefs is loved by content marketers across the globe, that use the tool for competitor analysis, backlink checking, SERP monitoring and much more.

Backed by the largest community of SEOs on the planet, Moz builds tools that make SEO, inbound marketing, link building, and content marketing easy. With Moz, search engine optimizers and marketers can improve their search engine rankings and reach a larger audience. Moz also provides a community aspect where marketers and SEO's can get together and learn from each other by writing and sharing articles and engage in discussions.

SEMRush is a search engine marketing toolset that is by millions across the globe. SEMRush provides tools for keyword research, competitor analysis, backlink reports and much more. The software is suited for small to mid-size search engine marketing firms or individual organizations looking to improve search engine rankings.