Dear SEO SpyGlass users, I am writing this as an answer to many questions that arose after Matthew Woodward published the results of his experiment where he compared the performance of the industry’s several top backlink checkers: SEO SpyGlass Majestic SEO Ahrefs Open Site Explorer (SEOmoz) Raven Tools The experiment involved 3 websites and the average number of backlinks found on the three websites was as follows: Needless to say I was surprised at these results.

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