Ahrefs

Ahrefs is an SEO platform built around its own web crawler and backlink index, one of the largest independent ones on the internet, which underpins nearly every tool it offers. Core features include Site Explorer for competitor and backlink analysis, Keywords Explorer for search volume and keyword difficulty data, Site Audit for technical SEO issues, and Rank Tracker for monitoring search positions over time. It has become a standard tool for SEO professionals, content marketers, and agencies who need to research keywords, analyze competitors' organic strategies, and diagnose site health issues.

More recently Ahrefs has expanded beyond traditional search into AI visibility with Brand Radar, which tracks how brands and content are surfaced in AI-generated answers from tools like ChatGPT and Google's AI Overviews. It has also layered AI features into its existing workflow: AI-assisted keyword clustering by search intent, content translation, keyword suggestions, and an AI Content Helper that scores how well a draft covers the topics and subtopics expected to rank for a given query. The company is known for publishing extensive original data studies on search and marketing, which has built it a strong reputation and following within the SEO community independent of the tool itself.

Pricing is subscription based with tiers ranging from small-business plans to enterprise, and Ahrefs also offers free tools like a limited backlink checker and keyword generator that serve as an entry point for people who aren't yet paying customers.