Ahrefs vs Semrush
Which should you use? A side-by-side look at what each one does, who it suits, what it costs, how hard it is to set up, and where each falls short.
AI tool · Paid
An SEO platform best known for its backlink index, with keyword research, audits and AI content tools.
AI tool · Paid
An online visibility suite for keyword research, site audits, competitor analysis and AI search tracking.
The short answer
Choose Ahrefs if you need…
- Backlink analysis
- Content gap research
Choose Semrush if you need…
- All-in-one SEO and PPC research
- Competitor analysis
Side-by-side
| Ahrefs | Semrush | |
|---|---|---|
| Type | Marketing & SEO · SEO suites | Marketing & SEO · SEO suites |
| Price | Paid | Paid |
| Platforms | Web, API | Web, API |
| Works with | Google Search Console | Google Analytics, WordPress |
| Hands-on tested by us | Not yet | Not yet |
| Last checked | 2026-10-29 | 2026-10-29 |
What each one is
Ahrefs
An SEO platform best known for its backlink index, with keyword research, audits and AI content tools. Top-tier link data. Usage-based limits and add-ons make costs climb.
Semrush
An online visibility suite for keyword research, site audits, competitor analysis and AI search tracking. Extremely broad toolset. Expensive, and the number of tools is overwhelming for beginners.
Best for
Ahrefs
- Backlink analysis
- Content gap research
Semrush
- All-in-one SEO and PPC research
- Competitor analysis
Strengths
Ahrefs
- Backlink index
- Keywords Explorer
- Site audit
- Brand Radar for AI search
Semrush
- Keyword and backlink research
- Site audits
- Position tracking
- AI visibility toolkit
Frequently asked questions
What is the difference between Ahrefs and Semrush?
Ahrefs: An SEO platform best known for its backlink index, with keyword research, audits and AI content tools. Semrush: An online visibility suite for keyword research, site audits, competitor analysis and AI search tracking. Ahrefs suits backlink analysis, while Semrush suits all-in-one seo and ppc research.
Are Ahrefs and Semrush free?
Ahrefs: Paid. Semrush: Paid.
What are other alternatives to Ahrefs and Semrush?
Other options people compare them with include Moz Pro, OpenSEO.
Keep comparing
Built from our catalogue entries for both products: open-source details come from each project's README (AI-assisted, refreshed weekly) and GitHub data; AI-tool details are editorial. Spotted something wrong? Let us know from either product's page.