Comparison
Ahrefs vs Semrush
Ahrefs: The benchmark SEO suite for backlinks, now with AI visibility. Semrush: The leading SEO suite, with AI tools and chatbot visibility tracking.
| Ahrefs | Semrush | |
|---|---|---|
| Rating | 4.6 | 4.5 |
| Price | Paid Starter $29/month; Lite $129, Standard $249, Advanced $449 (annual). Brand Radar AI indexes from $199/month extra. | Free trial Pro from $117.33/month (annual) or $139.95/month. 7-day free trial. |
| Free plan | ||
| API available | ||
| Open source | ||
| In Spanish | ||
| No watermark | — | — |
| Platforms | Web · Extension | Web |
Ahrefs or Semrush?
These are the two big ones and they have been neck and neck for years. The rule of thumb: Ahrefs leads on backlinks and link data; Semrush covers more ground — advertising, content, social media — and has the broader keyword database. For pure SEO they are equivalent, and most people choose by the module they will use most.
Choose Ahrefs if…
Your priority is link analysis, or you want a cheap entry with its $29/month Starter plan.
Choose Semrush if…
You also need to cover advertising, content and social, or you want the largest keyword database.
Ahrefs
- The best backlink index on the market
- Ahrefs Webmaster Tools is free for your own verified site
- Brand Radar measures your visibility in AI answers
- No full free plan: the entire suite is paid
- Brand Radar's AI indexes cost extra ($199/month per platform)
Semrush
- The most complete keyword and competitor database on the market
- AI Visibility Toolkit: measures your presence in chatbot answers
- All in one: SEO, advertising, content and social media
- Expensive: the Pro plan starts at ~$117/month and add-ons stack up fast
- Considerable learning curve given the sheer number of tools
The differences that actually matter
Links versus breadth
Ahrefs built its reputation on its link index and remains the benchmark for analysing a domain's backlink profile. Semrush covers far more ground: paid advertising, social media, competitor analysis, brand tracking. One goes deep on one thing, the other wide across many.
Spanish-language data
Both have solid data for Spanish-speaking markets, better than the sector average, but neither is infallible in small niches. Before subscribing, check five keywords in your field that you already know: if the volumes feel wrong, you will be misusing that data all year.
How they cap usage
Ahrefs has historically capped by query credits, so working fast burns through your plan. Semrush caps more by reports and projects. Neither is cheap, and in both cases the entry plan runs short as soon as you manage more than one site.
Frequently asked questions
Which do I pick if I can only pay for one?
If your work is pure SEO and link analysis is central, Ahrefs. If you run full marketing and also need advertising, content and competitor data in the same tool, Semrush repays the subscription better because it replaces several.
Are there cheaper alternatives that do the same?
For most small projects, yes: tools like SE Ranking cover rank tracking, audits and keyword research at a fraction of the price. What they do not match is the depth of Ahrefs' link index or Semrush's breadth.