Ahrefs is an SEO toolset covering backlink analysis, keyword research, site audits, and rank tracking, one of the two or three dominant SEO suites alongside Semrush.
Its core job is competitive SEO research: seeing which pages and keywords bring competitors organic traffic and who links to them, which drives content and link-building strategy. Ahrefs Webmaster Tools is a separate, genuinely free product scoped to your own verified site rather than competitor research.
SEO specialists, content marketers, and agencies doing competitive keyword and backlink research; solo site owners who just want to monitor their own site's health can stay on the free Webmaster Tools product.
Ahrefs Webmaster Tools is free but limited to verified-owned domains: 5,000 crawl credits per project per month, Site Audit, Site Explorer, and Web Analytics, with no competitor research. Paid plans for the full toolset start at Lite, $129/month for 5 projects and 750 tracked keywords.
All-in-one SEO toolset for backlinks and keywords.