Each one's way of doing it, and the point where it stops.
Keyword Research shows difficulty, volume, CPC and intent for a keyword in a chosen country, expands into similar, long-tail and question keywords, and Keyword Grouper clusters the list. Where it stops: No free plan, a 14-day trial with 10 research reports a day; country or region data only, no cities.
Keyword research shows volume, Keyword Difficulty, intent and AI Overview presence across 230 Google databases; Search Questions filters question keywords and clustering groups keywords by shared top-30 URLs. Where it stops: Free allows 10 searches a day with 10 results per report; the daily search allowance limits every plan.
Keyword Magic Tool expands a seed, Keyword Gap shows what competitors rank for and you don't, and Keyword Strategy Builder turns up to 10,000 keywords into pillar pages and subpages. Where it stops: Free allows 10 Keyword Magic Tool reports a day, 10 results each, no export; trials block exports.
Keywords Explorer expands seeds into matching terms, related terms, autocomplete suggestions and questions, filters by Keyword Difficulty, volume and Traffic Potential, and groups keywords by Parent Topic so one page covers a whole group. Where it stops: Ahrefs Free has no Keywords Explorer; Starter caps reports at 250 rows with no exports.
KWFinder shows keyword ideas with volume history, Keyword Difficulty, CPC and PPC competition, runs a keyword gap against up to 5 competitors, and sends saved lists straight to SERPWatcher. Where it stops: 100 lookups per 24 hours on Basic and 25 competitor keyword rows; volumes arrive about a month late.
Keyword Overview scores a keyword for volume, CPC, SEO Difficulty and intent; Keyword Ideas sorts related ideas into suggestions, questions, prepositions, comparisons and AI Prompt Ideas, and bulk analysis scores many keywords at once. Where it stops: Free allows 3 searches a day, 3 keyword lists of 30 keywords and 1 location.
The Performance report lists the queries your site already appears for, with clicks, impressions and average position; filtering for high impressions at positions 8 to 20 shows pages close to page one. Where it stops: Only queries your verified site already appears for; no search volume, no new keyword ideas, 1,000-row tables.
Every verdict rests on the data in our product reports, never on a fee. How we score →