Best-of list · by use case
Keyword research tools answer different questions. How many people search this? Can a small site rank for it? Which keywords belong on the same page? A big database is only one of those jobs.
Grouped by job, not ranked. Data claims and prices are from each vendor's own site, at the time of writing (September 2026). We don't sell keyword research, so none of these is ours. Once your site has impressions, remember Search Console's queries report: it's keyword research for your own site, free.
Grouped by use case; order within a group is not a ranking. Prices at the time of writing (September 2026).
| Tool | Use case | Best for | Price |
|---|---|---|---|
| Semrush | Full keyword databases | Teams researching keywords and competitors across many markets. | SEO $139/mo |
| Ahrefs | Full keyword databases | Keyword research next to deep backlink data. | Lite $129/mo (Starter $29/mo) |
| Serpstat | Full keyword databases | Full-suite research at a lower price, with API from Team. | Individual $69/mo |
| KWFinder (Mangools) | Simple tools for beginners | Beginners who want clear difficulty scores. | Mangools plans (region-adjusted); free: 5 lookups a day |
| Ubersuggest | Simple tools for beginners | Small budgets and people who prefer paying once. | From $29/mo; lifetime at 10x monthly |
| LowFruits | Finding keywords a small site can win | New blogs and niche sites. | Standard $29.90/mo; PAYG from $25 |
| SpyFu | Finding keywords a small site can win | Seeing which keywords competitors rank and bid on. | Basic $39/mo ($29 yearly) |
| Keyword Insights | Clustering keywords into a plan | Planning a site from thousands of keywords. | Basic $58/mo (10,000 credits) |
| WriterZen | Clustering keywords into a plan | Paying once for research and clustering. | From $135 one-time |
| Keywords Everywhere | Keyword data in your browser | The cheapest paid keyword data. | From $84/yr |
Big databases inside full SEO suites.
SEO $139/mo
Keyword Magic Tool and research across 142 geographic databases; its knowledge base cites 28.8 billion keywords.
Lite $129/mo (Starter $29/mo)
Keywords Explorer inside the Ahrefs suite; its data page claims 28.7 billion filtered keywords across 217 locations.
Individual $69/mo
Budget suite; its stats page lists 8.91 billion keywords across 230 countries.
Easy interfaces and a difficulty score to guide you.
Mangools plans (region-adjusted); free: 5 lookups a day
Keyword tool claiming 2.5 billion related keywords and 65k+ locations, bundled with four other Mangools tools.
From $29/mo; lifetime at 10x monthly
Budget web app with keyword ideas, audits, backlinks and weekly rank tracking.
When authority is low and you need easy targets.
Standard $29.90/mo; PAYG from $25
Analyses live SERPs for weak spots where low-authority sites rank, with clustering and a rank tracker.
Basic $39/mo ($29 yearly)
Competitor keyword research for organic and Google Ads, with unlimited results on Pro.
Turning a long list into pages.
Basic $58/mo (10,000 credits)
SERP-similarity clustering, intent labels, cannibalization checks and AI briefs.
From $135 one-time
Keyword research with a Golden Filter and clustering of 10,000+ keywords, sold as lifetime deals.
Numbers while you search, no extra tab.
From $84/yr
Extension that shows volume, CPC and trends on Google and 15+ sites, plus AI Overview analysis, an API and an MCP server.
For your own site, Google Search Console's queries report. For new ideas, KWFinder's free tier (5 lookups a day) and Google Trends are good starts.
They're estimates, and tools disagree. Use them to compare keywords, not as exact numbers.
Not for our Autopilot, which plans from your Search Console data. Research tools are still useful for exploring new markets.
Checked on their own sites on 23 September 2026. Prices and terms change, so check before you buy. Domain ratings are approximate third-party estimates.
Mangools and Ubersuggest showed region-adjusted prices to us; the Ubersuggest figure is from its own page text.