Ahrefs vs Semrush: Which Should You Choose?

Ahrefs

Industry-standard SEO toolset built on the largest live backlink index.

Ahrefs is one of the two reference SEO platforms, built on a crawler that processes billions of pages daily to maintain the industry's best-regarded backlink index. Site Explorer reveals any site's backlinks, top pages, and organic keywords; Keywords Explorer covers keyword research across Google, YouTube, Amazon, and other engines with clickstream-calibrated volumes; Site Audit handles technical crawls; and Rank Tracker monitors positions. Recent years added AI features (AI keyword suggestions, content grader) and Brand Radar for tracking mentions in AI search. The free Ahrefs Webmaster Tools tier covers audits and backlink data for sites you own, while paid plans start far below the old entry point with the $29 Starter plan.

Semrush

All-in-one marketing platform spanning SEO, PPC, content, and competitive research.

Semrush is the broadest marketing intelligence platform on the market, covering SEO, paid search, content marketing, social media, and competitive research in one subscription. Its keyword database is among the largest available, and tools like Keyword Magic, Position Tracking, Site Audit, and Backlink Analytics anchor the SEO workflow. Where Semrush pulls ahead of pure-SEO rivals is breadth: advertising research exposes competitors' ad spend and copy, the content platform grades briefs against the SERP, and the Traffic & Market suite estimates any site's audience. AI search visibility tracking (across ChatGPT, Perplexity, and AI Overviews) has been added as the search landscape shifts. A limited free account makes light usage possible.