Semrush vs Ahrefs (2026): What the Data Says

Most Semrush vs Ahrefs comparisons hand you a feature checklist and a winner. This one starts with a problem you have probably seen yourself: point both tools at the same website on the same day and the numbers don't match. Not by a little. On one of our sites, Ahrefs reported 35 organic keywords and Semrush reported about 1,100.

So we ran the test on real sites. Both tools, on three sites we manage, in July 2026, then cross-checked against the one source that isn't an estimate: Google Search Console. That cross-check is what tells you how much to trust any single number.

Semrush vs Ahrefs: The Short Answer

If you want one platform for the whole job, pick Semrush. It spans SEO, AI-search visibility, paid search, content, local, and social, it reported far more ranking keywords on every site we tested, and it is the stronger fit for agencies, and for small-site owners who want to see early progress the more conservative tools miss. If your work is led by backlinks and organic research and you value a cleaner interface and more conservative numbers, pick Ahrefs.

A couple of things hold no matter which you choose. First, the tools will disagree, often dramatically, because they track different keyword databases, SERPs, and traffic models. Second, neither number is the truth. For your own Google traffic, Google Search Console is the closest thing to ground truth, and both tools are best treated as competitive-intelligence estimates, not measurement. The rest of this article shows how far apart they run on our own sites.

We Ran Both Tools on the Same Three Sites

We pulled fresh numbers in July 2026 from our own paid Ahrefs and Semrush accounts for three sites we manage: geotoolbox.ai (our own small, new AI-visibility tool) plus two client sites we have kept anonymous — an established, mid-size e-commerce store and a large marketplace. Same domains, same week. Here is what each tool said about organic keywords.

How we pulled this, so you can weigh it. Three sites is an illustration, not a study. Ahrefs figures are all-locations (our account is on the Lite tier, but plan tier limits row exports, not the headline counts, which come from the dashboard overview). Semrush's keyword figures use its worldwide database for geotoolbox and its US database for the two US-focused sites (the page counts below are Ahrefs all-locations against Semrush's US database). That scope is not perfectly matched, so treat the exact multipliers below as rough direction. The direction is what holds up.

One thing holds across all three: Semrush reports more keywords on every site, even on the two where it was restricted to a single US database. The size of the gap is where we are more cautious. In our sample it was widest on the smallest site (about 31 times) and narrower on the large one (about three times), which fits the idea that Semrush's database catalogs more of the long-tail and low-volume terms a young site picks up first. But that gradient rests on three points and a scope mismatch that happens to track site size, so test it on your own accounts before you rely on it.

The same pattern shows up in pages, with a caveat worth stating plainly because geotoolbox.ai publishes in both English and French. Ahrefs's all-locations report surfaces 20 ranking pages; Semrush's US database shows 92 (its US index does not see the site's French pages at all); and Google Search Console has 225 pages indexed across both languages. These are not the same measurement — ranking pages in one geographic scope versus Google's full multilingual index — so read them as three differently-framed slices of one site, not a clean ratio. What they agree on is the part that matters: no third-party tool sees the whole footprint, and only Search Console has the complete list.

The reason is structural: each tool tracks a different universe of keywords, countries, and SERPs, on different refresh schedules and with different thresholds for what counts as a ranking keyword. A keyword count is database coverage, not proof that any of those keywords rank or send traffic. Which raises the obvious question.

Coverage Isn't Accuracy: What Google Search Console Showed

The extra keywords Semrush reports could be real reach or pure noise. To find out which, we pulled the actual clicks Google Search Console recorded for each site over the same 30-day window. GSC counts the real Google organic clicks your site received, not visits from every channel, which makes it the best first-party benchmark for exactly the thing the tools are trying to estimate.

The overshoot is large. Note that these tool estimates are modeled monthly organic traffic while GSC is actual clicks over 30 days, so the two are not a perfect like-for-like; the point is the size of the gap, not a precise error rate. On the large site both tools ran three to nearly five times over Google's roughly 84,000 clicks: Ahrefs estimated 287,000 and Semrush 398,000. On the smallest site both overshot by six to ten times, because a new site's handful of real clicks is almost impossible to model. The mid-size store is the interesting one, where Ahrefs undershot (2,929 vs 3,558 real) while Semrush ran high at 6,261. Semrush read higher than Ahrefs on both larger sites; only on the smallest was Semrush the lower, and closer, of the two.

None of that makes either tool bad. It makes their "organic traffic" a modeled estimate, not a click counter. It also matches the most-cited public test on the question: a 2022 study in which Ahrefs checked its own estimates against Google Search Console on 1,635 websites and found a median deviation of 49.52% for Ahrefs and 68.36% for Semrush. One caveat, since we are the Semrush affiliate: Ahrefs ran and published that study, so read it as an interested party's finding, not a neutral referee. Its direction still lines up with what we saw — Semrush read higher on two of our three sites, and in that 2022 sample its estimates deviated more — and with what practitioners repeat constantly: the estimates are useful for spotting trends and comparing competitors, never for reporting your own traffic. For that, open Search Console.

The gap has a narrow practical use. Your own site's ratio of real Search Console clicks to a tool's estimate can roughly sanity-check that tool's number for a competitor, but only a competitor of similar size and market. Emphasis on rough: our three test sites show the error swinging from a slight undershoot to a ten-times overshoot, so a ratio borrowed from one site will not transfer cleanly to a site of a different size or age. It is a gut check at best.

Keyword Research: Database Breadth vs Click Realism

This is where the two tools show their personalities. Semrush's Keyword Magic Tool is built for breadth. It returns huge lists grouped into topic clusters with search intent attached, plus a Personal Keyword Difficulty score tuned to your domain. If your job is to find every angle on a topic and map coverage, Semrush surfaces more to work with, the breadth behind the larger keyword counts we saw.

Ahrefs Keywords Explorer is built for realism. Its signature metric is Traffic Potential: Ahrefs's estimate of the monthly organic traffic the current top-ranking page for a term gets from every keyword it ranks for, not just the head keyword's volume. It also reports a Clicks metric, its estimate of the average monthly search-result clicks a keyword generates, which accounts for zero-click searches as well as searches that produce several clicks. On a query where an AI Overview or featured snippet eats most of the clicks, that distinction is the difference between chasing a keyword and skipping it.

The database-size debate is mostly noise. Comparison articles quote figures for Ahrefs anywhere from 7 billion to 28.7 billion keywords depending on who is writing, which tells you these numbers are unreliable marketing counts, not audited facts. Both tools index tens of billions of keywords; that is plenty. What differs is philosophy: Semrush is usually described as the more expansive, higher-volume counter and Ahrefs as the lower, more conservative one, which is the shape our own three-site test showed. Both approaches are defensible, and the AI answers you see today increasingly repeat both sets of figures as if they were settled, which they are not.

Verdict: Semrush for breadth and content planning, Ahrefs for judging whether a keyword will actually send clicks.

Backlinks: Where Ahrefs Still Earns Its Reputation

Ahrefs built its name on backlinks, and it is still the default for link work, but the "bigger index" story has flipped on paper. By each vendor's own self-reported (and take-with-salt) count, Semrush now advertises the larger raw index, around 43 trillion links against Ahrefs's roughly 35 trillion. In a third-party ten-domain test, Style Factory found Semrush reported more referring domains on nine of them, including Amazon (4.3 million vs Ahrefs's 2.2 million).

Then look at our own smallest site and it flips the other way. For geotoolbox.ai, Ahrefs found 64 referring domains and Semrush found 27. Same site, and the tool with the "smaller" index found more than twice as many referring domains. The counts disagree in both directions, and raw index size tells you very little.

What separates them is quality and history. Ahrefs refreshes its link index constantly and keeps years of historical data, and its crawler has long been the practitioner favorite for link audits, disavow work, and finding a competitor's best links. A huge index full of dead or spammy links is worse than a smaller, cleaner one. If backlinks are the core of your work, Ahrefs remains the safer default, and our best link building platforms guide covers the outreach tools that sit on top of whichever index you use. If you want backlinks as one part of a wider suite, Semrush's data is now genuinely competitive on volume.

Everything Else: Audits, Rank Tracking, PPC, Local, Content

Outside keywords and links, the split is simpler: Semrush does more things, Ahrefs does fewer things with a cleaner interface. This is the all-in-one platform versus focused specialist trade-off, and it decides most purchases.

The table reads as a Semrush sweep, and on feature count it is one. But breadth has a cost: Semrush's local, agency, and AI features are often paid add-ons on top of the base plan, and the interface carries the weight of doing everything. Ahrefs does less on purpose, and people who live in it every day tend to prefer that focus. If your work is genuinely just organic search and links, you are paying for modules you will never open.

AI Search Visibility: Where Semrush Pulled Ahead in 2026

This is a big reason Semrush now wins the "which one platform" question for anyone whose audience is moving into AI answers. With a growing share of searches ending inside an AI answer instead of a blue link, whether you show up when ChatGPT, Gemini, or Google's AI Mode answers a question in your market is no longer a bonus metric. Both tools track it. They do not do it the same way.

Semrush's answer is the AI Visibility Toolkit, and it is the better-packaged, better-integrated of the two. It scores your brand with an AI Visibility Score (a 0–100 benchmark of how often AI answers mention you versus the median of your top competitors) and a Share of Voice percentage, across ChatGPT, Google AI Mode, Google AI Overviews, Gemini, and Perplexity. Prompt Research surfaces the prompts worth owning and who competes on them; a cited-sources breakdown shows which pages the engines actually pull from; and daily Prompt Tracking follows 25 custom prompts so you can benchmark competitors and watch shifts over time. If you already run a Semrush SEO plan (or the $199/mo Semrush One bundle), that AI layer (a separate purchase — pricing below) sits in the same account as your keyword, backlink, and content data, which is the unified AI-plus-SEO pitch.

Ahrefs answers with Brand Radar, and on raw engine coverage it is actually the wider of the two: it adds Microsoft Copilot and Grok on top of the same ChatGPT / AI Overviews / AI Mode / Gemini / Perplexity set (plus non-AI discovery surfaces like TikTok), backed by a 400M-plus prompt database, with its own competitor benchmarking and custom prompt tracking. Where it loses is packaging and price.

Two caveats before you read that table as a clean Semrush sweep. First, the AI Visibility Toolkit is sold separately — it is not folded into Pro, Guru, or Business, so it is a real line on the bill; where it wins is a lower entry price for full daily prompt tracking, not broader engine coverage. Second, both tools model AI visibility with simulated prompts rather than watching real user sessions, so treat their scores the way you treat their traffic estimates: excellent for your own trend line and for comparing competitors, not a literal count of every time a human saw your name.

We also ran this layer on a site we own. Point both tools at the same brand and they surface AI citations a Google-clicks report never registers. geotoolbox.ai earns about 152 Google clicks a month, the tiny number you saw earlier, yet both tools flagged it turning up in AI answers — Ahrefs counted 29 ChatGPT responses across 9 of its pages, while Semrush's AI Visibility Toolkit logged 31 citations across 19 cited pages. Those are different units and don't compare head-to-head, but together they make the point concrete: for an AI-first brand, keyword count is a progress signal, while whether engines actually cite you is a separate question that AI-visibility tools are built to measure.

Then we pulled the same site's first-party data from Bing Webmaster Tools, whose AI Performance report logs citations made inside Microsoft's Copilot ecosystem. It counted 10,300 citations across an average of 22 cited pages in three months — orders of magnitude above the 29 responses and 31 citations the two suites logged. Bing calls its own figure a sample, and it covers a different engine, period, and unit than the suites' simulated prompts, so this is not a scoreboard. What it shows is scope: the suites sample a fixed prompt set across their engine panels (Ahrefs's includes Copilot, but samples it), while Bing logs live citations inside its own ecosystem. No single source sees everything.

So the workflow is the one this article keeps arriving at: lean on the suites (Semrush's toolkit or Ahrefs's) to track your trend and watch competitors, and cross-check against the first-party data the platforms report — Bing Webmaster Tools now, Google's as it lands — plus an independent cross-engine read, remembering each is its own partial slice. To go deeper on the AI side specifically, we cover how to read AI share of voice, why engines fan one prompt into dozens of sub-questions (exactly why wide keyword coverage still helps here), and how the dedicated AI visibility tools stack up.

Pricing: What You'll Actually Pay in 2026

Sticker prices are close at every tier. The real difference is what sits on top: Ahrefs's cheaper plans meter usage with credits, while Semrush charges add-ons for extra users, local, and AI visibility. Here are the core plans, verified against each vendor's pricing page in July 2026. Confirm current numbers before you buy, since both change often.

A few things the table hides. Ahrefs's entry Lite plan is affordable but credit-metered (1,000 credits per user), and those credits burn fast in a deep research session, while its higher tiers move to unlimited credits but keep other export and project limits. Semrush's headline price is the base; extra seats are a paid add-on, and its AI Visibility Toolkit is a separate line item at $99/mo per domain billed annually (or bundled with SEO in Semrush One from $199/mo), so an agency's real bill climbs above the sticker. Both suites discount annual billing (Semrush by up to about 17%). And Ahrefs offers no classic time-boxed free trial (its free access is Webmaster Tools for sites you own), which matters if you want to test before committing.

If Semrush's breadth is the fit and you want to run this same three-site test on your own accounts, its SEO Toolkit starts at $139.95 a month (less billed annually) and there is a 7-day free trial to try it first. On a tight budget, start with our best free SEO tools guide before paying for either.

So Which One Should You Buy?

Match the tool to how you work rather than to a scoreboard.

The plain verdict: for most people buying one tool in 2026, Semrush is the more versatile default because it does more and shows a small site more of its own footprint, just remember that broader coverage is not better accuracy. Ahrefs is the better buy when backlinks and a focused, uncluttered workflow are the whole point. Neither will report your real traffic, so keep Search Console open next to whichever you choose.

One last thing, because it is the reason we ran this test at all. If your visibility is moving into AI answers, the tool question is only half of it. Of the two, Semrush has pushed AI visibility furthest into the core product: its AI Visibility Toolkit pulls citation tracking, Share of Voice, and daily prompt monitoring into the same account as the SEO data. For a site like ours, whose Google clicks are tiny but whose name turns up in AI answers, that layer is the one worth watching most. Run the 7-day Semrush trial to pull your own numbers, then check them against Search Console and an independent AI-citation read — the disagreement between the three tells you more than any single tool will.

Frequently Asked Questions

Which is better, Semrush or Ahrefs?

For most people buying one tool, Semrush is the more versatile pick because it covers SEO, paid search, content, and local in one platform and surfaces more keywords. Ahrefs is better if your work is led by backlinks and organic research and you prefer a cleaner interface with more conservative numbers. Neither reports your real traffic, so pair whichever you choose with Google Search Console.

Can you trust Semrush's traffic numbers?

Trust them for relative comparison and trend direction, not as literal visits. In our test across three sites, Semrush's organic-traffic estimate ran higher than Ahrefs's on the two larger sites and overshot actual Google Search Console clicks; on the smallest site both overshot, with Ahrefs the higher of the two. Both tools model traffic from rankings and click curves; only Search Console counts your real clicks.

Why do Semrush and Ahrefs show different keyword counts for the same site?

Because they track different keyword databases, update schedules, and definitions of a ranking keyword. Semrush cataloged more terms on every site we tested; we did not test which query types drove the difference. In our data the gap ranged from about 3 times more on a large site to 31 times more on a small new site.

Does Semrush track AI search visibility?

Yes. Semrush's AI Visibility Toolkit tracks how your brand appears across ChatGPT, Google AI Mode and AI Overviews, Gemini, and Perplexity, with an AI Visibility Score, Share of Voice, cited-source breakdowns, and daily tracking of 25 custom prompts for competitor benchmarking. It is priced separately ($99/mo per domain billed annually, or bundled with SEO in Semrush One from $199/mo), not part of the standard SEO plans. Ahrefs offers similar tracking through Brand Radar across an even wider engine set (it adds Copilot and Grok, plus non-AI discovery surfaces like TikTok), but full custom-prompt access costs more.

Do you need both Semrush and Ahrefs?

Most people do not. The overlap is large, and one tool plus Google Search Console covers the core job. Teams that do serious link building sometimes keep Ahrefs for its backlink index alongside Semrush for everything else, but paying for two full subscriptions is a cost most solos should skip.

Is there a free alternative to Semrush and Ahrefs?

Google Search Console and Google Keyword Planner are free and cover your own rankings and basic keyword volumes. Both tools also offer limited free tiers, and free graders exist for specific jobs. Our best free SEO tools guide covers the ones worth starting with before you pay.

Which is better for a new or small website?

Semrush, in most cases, because it catalogs more of the keywords a young site starts ranking for, so you see progress Ahrefs may not register yet. If budget is the deciding factor, Ahrefs has a limited $29 Starter tier while both full plans cost about the same at entry, so lean on the free options (Search Console, Keyword Planner, and each tool's free access) first. Either way, treat the traffic estimates as directional until Search Console has enough data.

Sources

• How Accurate Are the Search Traffic Estimations in Ahrefs? (New Research) - Ahrefs (Tim Soulo), May 2022 - ahrefs.com/blog/traffic-estimations-accuracy
• SEO Toolkit Plans and Pricing - Semrush, July 2026 - semrush.com/pricing/seo
• AI Visibility Toolkit (features and pricing) - Semrush, July 2026 - semrush.com/kb/1493-ai-visibility-toolkit and semrush.com/pricing/ai
• Brand Radar (AI-visibility features and coverage) - Ahrefs, July 2026 - ahrefs.com/brand-radar
• AI Performance report (first-party AI-citation data for geotoolbox.ai; Bing labels the figures a sample of overall activity, sourced from Microsoft Copilots and partners) - Bing Webmaster Tools, July 2026 - bing.com/webmasters
• Ahrefs Pricing - Ahrefs, July 2026 - ahrefs.com/pricing
• Ahrefs vs Semrush (2026) - Which Should You Use? (10-domain referring-domain test) - Style Factory, January 2026 - stylefactoryproductions.com/blog/ahrefs-vs-semrush
• Google Search Console (ground-truth click data) - Google - search.google.com/search-console/about
• First-party account data for geotoolbox.ai and two anonymized client sites, pulled from our own Ahrefs, Semrush, and Google Search Console accounts, July 2026.