Semrush vs Ahrefs
Last updated: 2026-07-07
Semrush and Ahrefs are the two biggest names in SEO tools. Both offer keyword research, rank tracking, site audits, and backlink analysis — but they have different strengths. Semrush is an all-in-one digital marketing suite (SEO, PPC, social media, content). Ahrefs is focused purely on SEO, with the best backlink crawler in the industry.
Feature Comparison
| Feature | popular Semrush | best Ahrefs |
|---|---|---|
| Price from | $139.95/mo | $129/mo |
| Free trial | Free limited account (10 searches/day) | Limited free tools (Webmaster Tools) |
| Best for | SEO professionals and agencies | Backlink analysis and content research |
| Free plan | 10 searches/day (limited data) | Webmaster Tools (limited) |
| Starting price | $139.95/mo (Pro), $249.95/mo (Guru) | $129/mo (Lite), $249/mo (Standard) |
| Keyword database | 25B+ keywords | 19B+ keywords |
| Site audit | ✓ | ✓ |
| Rank tracking | ✓ | ✓ |
| Backlink analysis | ✓ | Best in industry |
| Competitor analysis | ✓ | ✓ |
| Content tools | SEO Writing Assistant | Content Explorer |
| API access | Business plan ($499.95/mo) | Enterprise plan ($449/mo+) |
| Support | Email + phone + chat | Email + live chat |
Semrush Pros & Cons
Pros
- Most comprehensive SEO toolkit on the market (55+ tools)
- Excellent keyword research with extensive database (25B+ keywords)
- Position tracking across multiple locations and devices
- Site audit tool finds technical SEO issues automatically
- Competitive analysis — see competitors' keywords and ads
- Free limited account (10 searches/day) for trying it out
Cons
- Expensive — $139.95/mo Pro, $249.95/mo Guru
- Learning curve — 55+ tools can be overwhelming
- Some features (historical data, PLA analysis) need Guru plan
- Keyword difficulty scores can be inconsistent
- Free account is very limited (10 searches/day)
Ahrefs Pros & Cons
Pros
- Best backlink index in the industry (largest crawler)
- Cleaner, faster interface than Semrush
- Content Explorer — find popular content by topic
- Free Webmaster Tools (site audit, backlink checker)
- More accurate keyword difficulty scores
- Site audit is more thorough than Semrush
Cons
- Expensive — $129/mo Lite, $249/mo Standard
- No social media management tools (unlike Semrush)
- No PPC/ads research features (unlike Semrush)
- Fewer tools overall than Semrush (SEO-focused only)
- Free plan very limited (Webmaster Tools only)
Final Verdict
If you need an all-in-one marketing toolkit that covers SEO, PPC research, social media, and content marketing, Semrush is the more comprehensive choice. If you're focused purely on SEO and want the best backlink analysis, cleaner interface, and more accurate keyword difficulty scores, Ahrefs is the better tool — and slightly cheaper at $129/mo vs $139.95/mo.
Our pick: Semrush (all-in-one) / Ahrefs (SEO-focused)
Frequently Asked Questions
Which has a better free plan: Semrush or Ahrefs?
Both offer limited free access. Semrush gives 10 searches/day with limited data. Ahrefs Webmaster Tools is free but covers only your own verified sites (backlink profile, site audit). For trying out features, Semrush's free account is more useful for general SEO research.
Which has better backlink data: Semrush or Ahrefs?
Ahrefs has the largest backlink crawler and is widely considered the gold standard for backlink analysis. Its index is more comprehensive and fresher than Semrush's. If backlink research is your primary use case, Ahrefs wins.
Does Semrush or Ahrefs have PPC and ads research?
Only Semrush. It includes PPC research, ad copy analysis, competitor ad spend estimates, and PLA (Product Listing Ad) research. Ahrefs is SEO-only and does not include PPC or paid advertising features.