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Ahrefs is where you find what to write about: backlink data, keyword volume, and the gap between your site and a competitor's, from a free tier up to $129 a month for Lite. Surfer takes a single term and turns it into instructions while the page is being drafted: length, headings, and the words the top results share, from $49 a month with no free tier. Ahrefs tells you what ranks and who links to it. Surfer tells you how to write the page that will join them. Most publishers who use one eventually add the other.
Ahrefs | Surfer | |
|---|---|---|
| Starting price (they differ) | From $129 | From $49 |
| Pricing model (they differ) | Free plan, paid tiers | Paid subscription |
| Free tier (they differ) | Yes | No |
| Billing | Monthly or annual | Not stated |
| Free trial | Not stated | Not stated |
| API | Yes |
Backlink and keyword data at full depth
Ahrefs runs its own crawler, which is why its backlink index is the one other tools get compared against, and why the keyword data goes deeper than the free alternatives. Site Explorer and Content Gap are what most people open it for. It is priced for businesses rather than for individuals, and the company states outright that it never discounts.
Our note
Between this and Semrush the split is old but holds: Ahrefs for backlinks and content research, Semrush for advertising data and rank tracking breadth. Pick on which half of the job is yours, because paying for both is rarely worth it.
Only on this side
Write the page against what is already ranking
Surfer reads what currently ranks for a term and turns it into instructions while a draft is being written: length, headings, and the terms the page is missing. It now tracks how often a brand appears in AI answers alongside its position in search. The cheapest tier exists to test the workflow on a small number of documents. Anybody expecting a rank tracker or a crawler is buying the wrong tool, because this is aimed at the writing rather than the site.
Buy Ahrefs first if the job is research: which competitor gets the links yours does not, which keywords are worth a shot, whether the site itself is broken somewhere Google can see. The free tier covers Site Explorer and Site Audit on a domain you own, so testing it costs nothing. Above that it is $129 a month with no free trial, so the free tier is the real test drive.
Buy Surfer once the research exists and the problem moves to the page itself. Discovery is $49 a month billed yearly for 120 documents, enough to test whether the guidance changes how a draft turns out. It has no free tier and no rank tracker or crawler built in, so a site with technical problems or a thin backlink profile will not find them here.
Ratings are the average of reviews readers left. The facts are stated by each tool’s own listing and are not verified by CloutStack. How we make money.
| Not stated |
| Data export | Not stated | Not stated |
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| Their cut | None | None |
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| Runs on | Web | Web |
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| Covers | SEO & Discovery, Research & Trends | SEO & Discovery, Writing & Scripts |
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| Works with | Nothing in particular | Nothing in particular |
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| Founded | Not listed | Not listed |
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| Reader rating | No reviews yet | No reviews yet |
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| Live deals | None right now | None right now |
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Shaded rows are where the two answers disagree and both listings have answered. A row where one side has not stated a fact is left plain, because silence is not a difference.
Our note
Start on Discovery and only move up when the document count runs out, because the jump to Standard doubles the price for capabilities most solo publishers never open. The AI visibility tracking is the genuinely new part of this product and the reason to prefer it over the older on-page tools.
Only on this side