Best AI Keyword Research Tools in 2026
8 tools, each with the price we read from the vendor and the date we read it.
8 tools · checked 20 Aug 2026
8 tools in Keyword Research, with monthly plans running from $24 to $129 — a 5-fold spread for products that describe themselves in much the same words.
One tool has a free tier rather than a trial (Semrush), and MarketMuse publishes no price at all.
They do not meter the same way — this page mixes fixed plans and quotes — so compare what a price buys before comparing the price.
Frase Research, brief and draft in one SEO writing tool pricingfree tierapi 
Surfer SEO Content briefs and on-page scoring from SERP analysis pricingfree tierapi 
Scalenut Cluster planning and long-form drafting in one place pricingfree tierapi 
MarketMuse Content inventory and gap analysis at site level pricingfree tierapi 
Semrush Content Toolkit Content ideas and drafts inside the Semrush stack pricingfree tierapi 
Ahrefs The backlink index most of this industry quotes pricingfree tierapi M Moz Pro SEO suite with the cheapest entry among the majors pricingfree tierapi S Semrush SEO suite that folded AI-search tracking into its base plan pricingfree tierapi prices read from vendor pricing pages · 20 Aug 2026 · how we verify