SEO Tools · Head to head

Ahrefs vs Semrush

Both products compete in SEO Tools. SEO Tools software supports search engine optimization through rank tracking, keyword research, site auditing, and backlink analysis. They help content and marketing teams understand search visibility, find keyword opportunities, diagnose technical issues, and monitor competitive positioning in search results. Here are the facts the B4 Index maintains on each, side by side.

The two files, side by side

Ahrefs

Semrush

What it is

We help marketers drive visibility across AI search, SEO, content, and social – with the largest AI and search databases online.

Semrush is the leading platform to grow and measure brand visibility across AI search, SEO, PPC, social, and more.

Website

ahrefs.com ↗

semrush.com ↗

Pricing

$99-449/month

$130-500/month

Categories served

SEO Tools

Status

Active · verified September 2026

The Ahrefs file → The Semrush file →

The decision underneath the comparison

Choosing between Ahrefs and Semrush assumes you're buying SEO Tools at all. That's the prior question, and the B4 Index scores it on two axes: how much SEO Tools differentiates you, and how far AI has come at building it. Read the build-versus-buy considerations for SEO Tools before you shortlist either product.

Vendor facts are maintained independently of any B4 verdict and re-verified on a monthly liveness check. See the full methodology.