Ahrefs is a full-suite SEO platform whose reputation rests on Site Explorer and the backlink index behind it. Keywords Explorer covers search volume, difficulty and click estimates across Google and several other engines; Site Audit crawls a site for technical problems; Rank Tracker follows positions over time; Content Explorer searches a large page-level index for topics and link opportunities. A free Ahrefs Webmaster Tools tier exists for site owners who verify their own property, offering site audit and limited backlink data on that site only. The paid product is aimed at agencies and in-house SEO teams, and its pricing reflects that — the entry Starter plan is deliberately limited, and the plans most professionals actually use sit well above it.
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