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Keyword research tools

Tools for finding search keywords, search volume, difficulty and question ideas. Ranked by how often ChatGPT, Gemini and Google AI Mode name each brand, cite its site and put it first when answering 18 buyer-intent questions.

Run 2026-09-27 · 54 answers · country US · methodology

Ranking

Semrush scored highest in this run at 79.9: named in 96% of answers and cited in 44%.

# Brand Score Mentioned Cited Avg. position
1 Semrush semrush.com 79.9 96% (52) 44% (24) 1.65
2 Ahrefs ahrefs.com 62.5 83% (45) 20% (11) 1.93
3 Mangools mangools.com 20 26% (14) 13% (7) 3.64
4 LowFruits lowfruits.io 17.9 22% (12) 11% (6) 2.58
5 AnswerThePublic answerthepublic.com 15.2 22% (12) 2% (1) 3
6 SE Ranking seranking.com 15 20% (11) 6% (3) 2.82
7 Ubersuggest neilpatel.com 10.7 15% (8) 4% (2) 3
8 Moz moz.com 9.5 11% (6) 9% (5) 3
9 SpyFu spyfu.com 8.3 11% (6) 4% (2) 2.5
10 Keywords Everywhere keywordseverywhere.com 8.2 11% (6) 2% (1) 2.33
11 Similarweb similarweb.com 1.6 2% (1) 2% (1) 4
12 Serpstat serpstat.com 1.2 2% (1) 0% (0) 3

Score = 60% mention rate + 25% citation rate + 15% position prominence, 0–100. Counts in brackets are answers out of 54. Average position is the brand's order among this category's brands in answers that name it.

By engine

Share of each engine's answers that name the brand.

Brand ChatGPT n=18Gemini n=18Google AI Mode n=18
Semrush 89%100%100%
Ahrefs 94%67%89%
Mangools 17%33%28%
LowFruits 17%22%28%
AnswerThePublic 11%28%28%
SE Ranking 6%11%44%
Ubersuggest 22%11%11%
Moz 28%6%0%
SpyFu 6%17%11%
Keywords Everywhere 6%17%11%
Similarweb 6%0%0%
Serpstat 0%0%6%

No answers from Perplexity in this run; the ranking uses the other engines only.

Prompts used

Each prompt was sent once to every engine, as written:

  1. What is the best keyword research tool?
  2. Best free keyword research tool
  3. Most accurate search volume data tool
  4. Best keyword research tool for bloggers
  5. Best tool to find low-competition keywords
  6. Best keyword research tool for ecommerce product pages
  7. Best tool for finding long-tail question keywords
  8. Best keyword research tool for YouTube and Amazon
  9. Which keyword tool has the most accurate keyword difficulty score?
  10. Best keyword research tool for PPC campaigns
  11. Cheapest keyword research tool for beginners
  12. Best keyword research tool for local keywords
  13. Best tool to find the keywords competitors rank for
  14. Best keyword clustering tool
  15. Best keyword research tool with a Chrome extension
  16. Which keyword research tool is best for non-English markets?
  17. Best keyword research tool for content agencies
  18. Best keyword tool with an API for bulk lookups

Run these prompts for your own brand

The answers behind this table came from the AnswerLine API. The free plan includes 500 credits a month, no card.

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