Free Keyword Research Tools
The honest answer: free tools cover 50–60% of a serious keyword research workflow. The remaining 40–50% — accurate long-tail volume, competitive analysis, rank tracking — requires a paid tool. Here is what each free option actually does.
Price reality check
Ahrefs Lite $129/mo (£103/mo) · Semrush Pro $139/mo (£111/mo) · KeySearch $17/mo (£14/mo) · Moz Pro Standard $99/mo (£79/mo) · KWFinder $29.90/mo (£24/mo) · Frase $45/mo · Google Keyword Planner £0 (throttled) · Ahrefs Enterprise $1,499/mo.
Google Keyword Planner
£0The only tool with direct Google data. Volumes bucketed below 1,000 — nearly useless for long-tail research. Requires a Google Ads account (do not need to spend money).
Best for
Validating head terms and confirming demand exists
Limitation
Volumes below 1K are bucketed into ranges (100–1K, 1K–10K) — not useful for niche-site keyword research
Google Search Console
£0The most underrated free keyword source. Shows actual queries your site ranks for with real impressions and CTR. Only works for sites you own.
Best for
Finding quick-win keywords where you rank position 8–20
Limitation
Only shows data for your own site — cannot research competitor keywords
Google Trends
£0Best tool for comparing keyword trajectory: is a term growing or declining? "ai keyword research tool" is up 84% YoY. "free keyword research tool" is down 63%.
Best for
Validating whether a topic is growing or dying before building content
Limitation
Shows relative popularity, not absolute volume — cannot tell you how many searches a term gets
Ubersuggest (free tier)
£0 (3 searches/day)The free tier gives volume estimates and keyword suggestions. 3 searches per day — exhausted in 10 minutes of real work. Enough to validate a single keyword idea.
Best for
Quick single-keyword checks when you do not have a paid tool
Limitation
3 daily searches. Not a substitute for a real keyword research workflow.
AnswerThePublic (free)
£0 (3 searches/day)Visualises question-format keywords from autocomplete data. The best free tool for finding "how to", "what is", and "why" variants of any seed keyword.
Best for
Informational content topic ideation
Limitation
3 free searches per day on the free tier. The paid version is $9/mo and worth it if you do this regularly.
Realism check
Typical month-1 result if you actually use free keyword research tools seriously: 30–60 long-tail keyword targets identified, 5–10 of those turn into published posts that earn impressions within 90 days. Expect £0 in affiliate revenue from those posts in month 1. Month 6, if the keywords are well-chosen, that same set earns £50–£300/mo. Month 12, if you've kept publishing on the topic cluster, £200–£1,500/mo. None of this happens without the publishing — the tool only finds the keywords.
Free trials: paid tools at zero cost
Most "free" keyword tools are 14-day trials in disguise. Here is what each trial actually gives you, what the billing trigger is, and whether the trial is long enough to make a real decision.
Note: keyword research tool free trial has a £92.72 CPC on Google Ads — vendors pay £90+ for one trial sign-up because the LTV math (£600–£1,800 at 30–60% affiliate commission) supports it. These trials are designed to convert. Read the billing terms before entering a card.
No credit card required (base tier)
Best trial in the professional tier. Full access to Keyword Magic Tool and competitive research for 14 days.
Start Semrush trial →Credit card required
The lowest barrier to testing real clickstream data. Worth $7 to validate whether Ahrefs volume aligns with your niche.
Start Ahrefs trial →No credit card required
Longest trial in the professional tier. Full 30 days of Keyword Explorer, rank tracking, and site audit.
Start Moz Pro trial →No credit card required
Full access for 10 days. Best UX in the budget tier — the trial is enough to know if the interface suits your workflow.
Start KWFinder trial →Not sure which tool to trial first?
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