10 Best Keyword Research Tools in 2026 (Free and Paid)
The 10 best keyword research tools for 2026, from free Google Keyword Planner and Search Console to Semrush, Ahrefs, Mangools and AlsoAsked, plus how to research AI prompts.
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Last updated: 29 October 2026
Quick answer: Semrush (Pro from $139.95 a month) and Ahrefs (from $129 a month) are the most complete keyword research tools. Budget teams get good data from SE Ranking (from $44 a month) or Mangools KWFinder (from $29 a month). Google Keyword Planner, Search Console and Google Trends are free, and AlsoAsked and AnswerThePublic are the best tools for finding the long questions people now ask AI assistants.
Keyword research still matters in 2026, but the job has widened. Buyers type short keywords into Google and long, specific questions into ChatGPT, Gemini and Perplexity. The best research combines search volume data with question discovery. This list covers both, and our guide to AEO prompt research explains how to turn keywords into a prompt set.
Key takeaways
- Search Console is the most accurate free source: real queries for your own site.
- Semrush and Ahrefs offer the largest databases and competitor data.
- Question tools reveal the long prompts people ask AI assistants.
- Volume is a guide, not a goal; intent and fit matter more.
Keyword research tools compared
| Tool | Starting price (2026) | Free option | Best for |
|---|---|---|---|
| Semrush | $139.95/month (Pro) | 10 queries/day | All-in-one SEO and competitor research |
| Ahrefs | From $129/month (Lite) | Webmaster Tools for your own site | Large keyword and backlink database |
| Google Keyword Planner | Free | Yes, with a Google Ads account | Volume ranges from Google |
| Google Search Console | Free | Yes | Real queries for your site |
| SE Ranking | From $44/month | 14-day trial | Budget all-in-one |
| Mangools KWFinder | From $29/month | 5 lookups/day | Easy research for small teams |
| Moz Keyword Explorer | From $49/month | 10 queries/day | Keyword difficulty and priority |
| AlsoAsked | From $15/month | 3 searches/day | People Also Ask question trees |
| AnswerThePublic | From $5/month | 3 searches/day | Question and preposition ideas |
| Keywords Everywhere | $10 for 10,000 credits | Limited free | Volumes inside your browser |
Prices come from 2026 vendor listings and reviews; check current pricing before you buy.
1. Semrush
Semrush’s Keyword Magic Tool, keyword gap analysis and position tracking make it the most complete option for teams that also need competitor research and audits. Pro starts at $139.95 a month. Its AI Visibility Toolkit is sold separately.
2. Ahrefs
Ahrefs Keywords Explorer offers a very large database, click data and strong competitor analysis. Paid plans start around $129 a month. Ahrefs Webmaster Tools gives free data for sites you own.
3. Google Keyword Planner
Free with a Google Ads account, no ad spend required. It shows volume ranges and related keywords straight from Google, though exact volumes are limited without active campaigns.
4. Google Search Console
The Performance report shows the actual queries that bring impressions and clicks to your site, including long questions. It is the best source for finding pages to improve, and traffic from Google’s AI features is included in the Web search type.
5. SE Ranking
A capable all-in-one tool for keyword research, rank tracking and audits at a lower price, from about $44 a month.
6. Mangools KWFinder
KWFinder is simple and fast, with clear difficulty scores, which makes it popular with bloggers and small businesses. Plans start at $29 a month with a small free allowance.
7. Moz Keyword Explorer
Moz shows difficulty, organic click-through rate and a priority score to help you choose keywords, from $49 a month with ten free queries a day.
8. AlsoAsked
AlsoAsked maps Google’s People Also Ask questions into trees, showing how questions branch. That mirrors how AI features fan out to related questions, which makes it a strong AEO research tool. Plans start at $15 a month.
9. AnswerThePublic
AnswerThePublic groups autocomplete suggestions into questions, prepositions and comparisons, a quick way to find “how”, “why”, “vs” and “best” queries. Plans start at $5 a month.
10. Keywords Everywhere
A browser extension that shows volume and related keywords on Google and other sites, paid with credits starting at $10 for 10,000.
From keywords to AI prompts
- Start with Search Console: export long queries of seven or more words; they look like prompts.
- Expand with question tools: use AlsoAsked and AnswerThePublic on your core topics.
- Add buyer language: pull questions from sales calls, support tickets and reviews.
- Rewrite as prompts: “best [service] for [type of business] in [city]” and “[product] vs [competitor]”.
- Track 20 to 100 prompts: monitor them in AI engines each month. See our list of AEO tools for trackers.
Want a keyword and prompt map for your business? We combine search data and real buyer questions into one research plan. Request an AEO audit.
Frequently asked questions
What is the best free keyword research tool?
Google Search Console for your own site’s queries, and Google Keyword Planner for new ideas. Google Trends helps compare interest over time.
Is Semrush or Ahrefs better for keyword research?
Both are excellent. Semrush offers more marketing tools in one suite; Ahrefs is often preferred for its database and interface. Pick the one that fits your workflow and budget.
Is keyword research still useful with AI search?
Yes. Keywords show demand and language. Combine them with question research to cover the longer prompts people use with AI assistants.
Can ChatGPT do keyword research?
It can suggest topics and questions but does not have reliable search volume data. Use it for ideas and check demand in a keyword tool.
Sources
- Best keyword research tools 2026, Scale Growth Digital, March 2026
- Screaming Frog alternatives 2026 (Ahrefs and Semrush plan prices), CrawlRaven, 2026
- AI features and your website, Google Search Central
Product details, prices and features are checked at the time of writing and can change. Sources are linked in the text so you can check them yourself.
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