Semrush and Ahrefs are the reference SEO platforms. Choosing between them is less about features than about which workflow your team actually runs.
We've run both in parallel across editorial and consulting projects.
Data breadth vs data depth
Semrush has more datasets (SEO, PPC, PR, social). Ahrefs has deeper indexes in the categories it competes in.
Keyword research
Ahrefs's Keywords Explorer is our editorial team's default; Semrush's Keyword Magic Tool is broader for gap analysis.
Backlinks
Ahrefs wins on index size and freshness; Semrush is competitive but not category-leading.
Site audit
Semrush's Site Audit is slightly more prescriptive; Ahrefs is more explanation-driven.
Content research
Ahrefs's Content Explorer remains unmatched; Semrush counters with the Content Marketing add-on.
Price
Ahrefs's Starter tier ($29) is the cheapest entry to a serious platform; Semrush's Pro ($139.95) is fuller but heavier.
At a glance
| Attribute | Semrush | Ahrefs |
|---|---|---|
| Starting price | $139.95/mo | $29/mo (Starter) |
| Keyword database | 24B+ keywords | 22B+ keywords |
| Backlink index | 43T+ backlinks | 35T+ backlinks (fresher crawl) |
| Site audit | Prescriptive, fast crawl | Explanation-driven, deep detail |
| Content marketing | Add-on module (paid) | Included in Content Explorer |
| PPC intelligence | Best-in-class | Basic keyword data only |
| Free tier | Limited daily queries | Ahrefs Webmaster Tools (own-site data) |
- Agencies serving multi-channel clients
- Competitive intelligence
- PPC + SEO teams
- Editorial and content teams
- SEO consultants
- Link builders and backlink-heavy niches
Final verdict
Neither wins outright. Pick Ahrefs if your work centres on editorial content and links; pick Semrush if your work spans SEO, PPC and broader marketing intelligence.
Affiliate disclosure: some links on this page earn Golvra a commission at no cost to you.
Frequently asked questions
Which is cheaper, Semrush or Ahrefs?
Ahrefs Starter is the cheapest serious entry point. At mid-tier, prices are similar.
Which has better backlink data?
Ahrefs — by both index size and freshness of crawl.
Do I need both?
Some agencies do — but most teams pick one and complement with a specialist like Surfer or LowFruits.
Which is better for beginners?
Ahrefs's interface is slightly friendlier, but Mangools remains the true beginner pick.