Ahrefs vs Semrush

Ahrefs is an SEO toolset from a Singapore-headquartered company founded in 2010 by Dmitry Gerasimenko. It is built around one of the largest live backlink indexes and a web crawler that ranks among the most active on the internet after Google's, and it is used by SEO professionals, agencies and content teams to understand why sites rank and how to compete with them.

Site Explorer shows any domain's backlinks, referring domains, organic keywords, top pages and traffic estimates; Keywords Explorer researches keywords for Google and other search engines including YouTube and Amazon; Site Audit crawls your site for technical issues, Rank Tracker monitors positions, and Content Explorer finds popular content on any topic. Newer additions such as Brand Radar track how often brands appear in AI answers and Google AI Overviews. Paid plans are tiered by users, history and limits, with usage limits on lower tiers, while free Ahrefs Webmaster Tools give site owners audits and backlink data for their own verified sites.

Ahrefs fits agencies, in-house SEO teams and content-driven companies that need reliable backlink and keyword data every day. Its prices start higher than most competitors and usage limits on lower plans frustrate heavy users. Semrush is the closest rival with stronger PPC and market research tools, SE Ranking and Mangools cover the basics for less, and Screaming Frog complements Ahrefs for deep technical crawling.

Semrush is an online visibility and marketing intelligence platform founded in 2008 by Oleg Shchegolev and Dmitry Melnikov. Headquartered in Boston, it was listed on the New York Stock Exchange from 2021 until Adobe, which announced the deal in late 2025, completed its acquisition in 2026; Semrush now operates as an Adobe company. Semrush started as an SEO tool and now covers search, paid advertising, content, local, social media and competitive research for marketing teams and agencies.

Core SEO tools include Keyword Magic Tool and Keyword Overview, Domain Overview and Organic Research for competitor analysis, Backlink Analytics and Backlink Audit, Site Audit for technical issues, Position Tracking for daily rankings, On Page SEO Checker and SEO Writing Assistant. Advertising Research reveals competitors' paid search, and Traffic Analytics estimates website traffic. Newer features track brand visibility in Google AI Overviews and AI assistants such as ChatGPT. Plans run from a limited Free tier through SEO, Starter, Pro+ and Advanced, plus paid add-on toolkits and extra user seats.

Semrush fits agencies and marketing teams that run SEO and paid search together and want competitive data in one subscription. It is expensive, add-ons and seats raise the total quickly, and the breadth creates a learning curve. Ahrefs is the main rival and is often preferred for backlink data and a cleaner interface, SE Ranking and Mangools are cheaper for smaller teams, and Similarweb is stronger for market-level traffic intelligence.