CiteLadder asked Claude Sonnet 5.5 20 buyer questions about SEO tools, three times each, in three conditions: from memory, with web search available, and told to search first. From memory, Claude named Ahrefs in 83% of answers. When told to search, Semrush moved to the top at 75%. This page shows what Claude said. It is not a ranking of which product is best.
What was asked
The 20 prompts cover the questions buyers type when they shop for SEO software. Some ask for an overall pick, some describe a specific buyer, some focus on price, features or a shortlist. Examples:
- "What is the best all-in-one SEO tool right now?"
- "Best SEO tool for a small agency managing 20 clients"
- "SEO tools that track rankings in AI search and AI overviews"
Each prompt ran three times per condition, which gives 60 answers per condition. Requests went through the Anthropic API at low effort, with no current date supplied. Results from the API can differ from the Claude apps. Another model listed the brands in each answer, and code did the counting.
Which brands Claude named from memory
With no tools, Claude named 100 distinct brands across 60 answers, about 9.5 per answer. Two names appeared in most answers:
- Ahrefs in 83% of answers, named in every run for 13 of the 20 prompts.
- Semrush in 77% of answers. It was named first 19 times, more than any other brand, with an average position of 3.
Google followed at 67%. The extractor counted Google as one brand, and its free tools come up in questions like the free-tools prompt. After that the shares drop: Screaming Frog at 43%, Moz at 42%, SE Ranking at 40%, Ubersuggest at 38% and Mangools at 33%.
Consistency across runs was moderate. Run agreement was 63.1%. The top three brands took 23.8% of all mentions, so the long tail of other tools was large.
How often Claude searched when it could
When web search was available but not required, Claude did not search at all. Zero of 60 answers used it, and the total search count was 0.
These answers still came from memory. They named more brands, 125 distinct and 11.7 per answer, with Semrush at 88% and Ahrefs at 87%. Run agreement was 63.2%, close to the no-tools condition. For SEO tool questions, simply offering search did not change how Claude found its answers.
What changed when Claude was told to search
When the system prompt told Claude to search first, all 60 answers searched, with 245 searches in total. Answers got shorter on brands: 95 distinct brands and 7.1 per answer. Run agreement fell to 55.4%, and the top three took 27.8% of mentions.
- The leader changed. Ahrefs was the most named from memory. Semrush was the most named when told to search, at 75% of answers. Ahrefs fell to 68%.
- Kept in the top five: Ahrefs, Semrush, Google and Screaming Frog. Google dropped to 53% and Screaming Frog to 27%, though Screaming Frog was named first 6 times.
- Left the top five: Moz, which went from 42% from memory to 20%.
- Entered the top five: SE Ranking, which held 40% in both conditions while others around it fell.
Content tools appeared lower in the list. Surfer SEO was named in 15% of searched answers and Frase in 13%.
What Claude searched for
Claude's queries read like a buyer's queries. 47.4% contained the word "best", and 49.2% contained a year. Without a current date in the request, Claude mostly wrote 2025: 127 queries used 2025 and 4 used 2026.
Sample queries:
- "best free SEO tools 2025"
- "best SEO tools track rankings AI Overviews AI search visibility 2025"
- "Semrush AI toolkit vs Ahrefs Brand Radar vs Profound vs Peec AI"
- "enterprise SEO software Conductor vs BrightEdge vs Botify vs seoClarity"
Some queries named brands directly, such as "free SEO tools limitations Ahrefs Webmaster Tools Semrush free plan". Claude used searches both to find lists and to check specific products it already had in mind.
Which sites its searches returned
The sites returned most often were a mix of independent review blogs and vendor sites:
- onelittleweb.com, in 40% of searched answers
- behindrankings.com, in 38%
- seranking.com, in 38%
- marketermilk.com, in 37%
- konabayev.com, in 30%
- zapier.com and semrush.com, each in 27%
searchatlas.com, guideflow.com and nightwatch.io also appeared in more than a fifth of searched answers. None of the 60 answers included inline citations, so readers did not see which pages shaped the list.
What a brand in this category can take from this
From memory, Claude's picture of SEO tools centers on a few names, and simply offering search did not change it. If your brand is not in that memory, it rarely appears unless Claude is pushed to search.
When it does search, the pages it reads matter. Comparison and "best of" articles on review blogs came up often. Two vendor sites, seranking.com and semrush.com, were also returned often, and both brands held or gained ground in searched answers. That does not prove cause, but it suggests a brand's own comparison pages can be read alongside third-party lists.
Practical steps:
- Check whether your brand appears on the review sites that Claude's searches returned.
- Publish clear comparison and use-case pages, since many queries named specific competitors.
- Keep dated content current. Most dated queries used 2025.
- Track your share across repeated runs. Single answers vary, and run agreement was below two thirds in every condition. CiteLadder measures this for your category.
Brand shares in each condition
Share of the 60 answers (20 prompts, three runs) that named each brand. "Prompts named in every run" counts the prompts where the brand appeared in all three runs from memory.
| Brand | From memory | Prompts named in every run | Told to search |
|---|---|---|---|
| Ahrefs | 83.3% | 13 | 68.3% |
| Semrush | 76.7% | 14 | 75% |
| 66.7% | 11 | 53.3% | |
| Screaming Frog | 43.3% | 7 | 26.7% |
| Moz | 41.7% | 6 | 20% |
| SE Ranking | 40% | 5 | 40% |
| Ubersuggest | 38.3% | 7 | 23.3% |
| Mangools | 33.3% | 6 | 20% |
| AnswerThePublic | 30% | 4 | not in top 15 |
| Rank Math | 25% | 3 | not in top 15 |
| Surfer SEO | not in top 15 | 15% | |
| Frase | not in top 15 | 13.3% |
Sites Claude's searches returned
When told to search. Share of answers whose searches returned at least one page from the site.
| Site | Answers | Share of searched answers |
|---|---|---|
| onelittleweb.com | 24 | 40% |
| behindrankings.com | 23 | 38.3% |
| seranking.com | 23 | 38.3% |
| marketermilk.com | 22 | 36.7% |
| konabayev.com | 18 | 30% |
| zapier.com | 16 | 26.7% |
| semrush.com | 16 | 26.7% |
| searchatlas.com | 15 | 25% |
| guideflow.com | 14 | 23.3% |
| nightwatch.io | 13 | 21.7% |
The 20 prompts
- What is the best all-in-one SEO tool right now? (best overall)
- Which SEO software do most professional marketers actually use? (best overall)
- Top rated SEO platforms for keyword research and rank tracking? (best overall)
- What's the most accurate SEO tool for backlink data? (best overall)
- Best SEO tool for a small agency managing 20 clients (for a specific buyer or use case)
- What SEO tool should a solo blogger use to grow traffic? (for a specific buyer or use case)
- Best SEO software for an ecommerce store with thousands of product pages (for a specific buyer or use case)
- Which SEO tools work best for local businesses with multiple locations? (for a specific buyer or use case)
- Enterprise SEO platform recommendations for a large in-house team (for a specific buyer or use case)
- Best SEO tool for a beginner who knows nothing about SEO (for a specific buyer or use case)
- What SEO tools help content writers optimize articles as they write? (for a specific buyer or use case)
- Good SEO tools for a SaaS startup doing content marketing (for a specific buyer or use case)
- Are there any genuinely useful free SEO tools? (budget or free)
- Cheapest SEO tool that still has decent keyword data (budget or free)
- Affordable alternatives to the expensive big-name SEO suites? (budget or free)
- Which tool is best for running technical SEO site audits and crawls? (feature-led)
- SEO tools that track rankings in AI search and AI overviews (feature-led)
- Which SEO platform has the best white-label client reporting? (feature-led)
- Compare the top three all-in-one SEO suites for agencies (comparison shortlist)
- Shortlist the best keyword research tools and their main differences (comparison shortlist)
Frequently asked questions
Which SEO tool did Claude name most often?
From memory, Claude named Ahrefs in 83% of answers and Semrush in 77%. When told to search, Semrush was named in 75% and Ahrefs in 68%. This reflects what Claude said, not which tool is best.
Does Claude search the web for SEO tool questions?
Not on its own in this study. With search available, it searched in 0 of 60 answers. When the system prompt told it to search, all 60 answers searched, with 245 searches in total.
Which brands lost or gained ground when Claude searched?
Moz dropped out of the top five, from 42% from memory to 20% when told to search. SE Ranking entered the top five, holding 40% in both conditions. Ahrefs, Semrush, Google and Screaming Frog stayed in the top five.
Are these results the same in the Claude app?
Not necessarily. The study used Claude Sonnet 5.5 through the Anthropic API at low effort, with no current date supplied. The Claude apps can behave differently.
Track how often Claude names you
CiteLadder tracks whether ChatGPT, Gemini, Claude and Google AI Overviews mention your brand in answers to your own buyer questions, along with position, sentiment and the competitors named beside you. Every result is tied to the recorded answer, so you can check exactly what was said.
Visibility over time
| Series | 8 Sep | 15 Sep | 22 Sep | 29 Sep | 6 Oct | 13 Oct | 20 Oct | 27 Oct |
|---|---|---|---|---|---|---|---|---|
| Acme Analytics | 27.9% | 29.6% | 30.2% | 31.8% | 32.5% | 33.1% | 34.2% | 38.4% |
| Northwind | 46.0% | 45.2% | 45.8% | 44.6% | 44.1% | 43.5% | 42.9% | 41.7% |
| Lumen | 30.4% | 31.0% | 29.8% | 30.6% | 29.9% | 29.2% | 28.8% | 27.5% |
412 answers to 120 prompts across 4 engines, week of 27 Oct – 2 Nov 2026
Brands
| Brand | Visibility | Change |
|---|---|---|
| Northwind | 41.7% | down 1.2 pts |
| Acme Analytics | 38.4% | up 4.2 pts |
| Lumen | 27.5% | down 1.3 pts |
| Fathom Labs | 16.9% | down 0.2 pts |
Acme Analytics by engine