Ahrefs vs SEO SpyGlass

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Ahrefs
Ahrefs Site Explorer is a search engine optimization tool for monitoring and analyzing backlinks to a specific site. Huge index of links, data updates every 15 minutes, friendly interface and rich data analysis have made Site Explorer the world's most powerful tool for checking links. The tool can show links (including new and internal), linking domains, anchors, and best pages of a domain.
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SEO SpyGlass
SEO Tools from SEO Spyglass give your website the optimal advantage to outrank the competition on search engines. Our SEO TOOLS give you all the information you need to become the SEO consultant for your website.