Keyword research tools help marketers find the words, phrases, and questions people type into search engines before they visit a website. They turn vague content ideas into search terms you can track.
As search behavior keeps spreading across traditional results and AI answers, over plan to use, or already use, SEO optimization for AI-powered search engines. The best keyword analysis software helps accomplish both goals.
I’m highlighting the 15 best keyword planners for performing keyword research. Some are free and useful for early brainstorming. Some validate search volume and ranking difficulty. Others are advanced keyword analysis tools for competitor research, SERP analysis, content planning, rank tracking, and AI search visibility.
Table of Contents
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How to Do Keyword Research With Free Tools: A Step-by-Step Process
- Pro Tips for Maximizing Free Keyword Research Tools
- Frequently Asked Questions About Keyword Research Tools
Quick Comparison: Best Keyword Research Tools for SEO
Free keyword research tools are best for budget-conscious beginners and small teams. Paid keyword research tools typically provide deeper data, broader databases, and advanced workflows.
Three takeaways make the tool choice easier:
- If your workflow is still early, use free tools to generate seed ideas, check basic demand, and organize keywords in a spreadsheet.
- If your budget allows paid software, prioritize tools that show search volume, ranking difficulty, SERP context, competitor gaps, and exports in one workflow.
- Regardless of your team size, add prompt tracking when AI answers begin affecting visibility, citations, and traffic. Even small businesses get traffic from LLMs.
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What are keyword research tools?
Keyword research tools help users find search terms their audience uses in Google and in ChatGPT. These tools show how often people search, how competitive a keyword is, and what kind of content already ranks. Most SEO research tools help with at least one of these jobs:
- Finding seed keywords from broad topics, competitors, products, or audience questions.
- Expanding those seed keywords into related searches, long-tail phrases, and question-based queries.
- Validating keywords with monthly search volume, keyword difficulty, CPC, intent, and trend data.
- Reviewing SERPs to understand which content formats, domains, and page types already rank.
- Grouping keywords into pages, clusters, refreshes, and campaigns.
The best keyword analysis software gives answers to the three critical questions for SEO:
- Is this keyword informational, commercial, navigational, or transactional?
- Does the searcher want a definition, a comparison, a template, a product, or a local provider?
- Are the ranking pages blog posts, tools, category pages, videos, or review sites?
A 3-step Keyword Research Process
The keyword research workflow starts with seed keywords, but it shouldn’t stop there. A realistic workflow has three stages: discovery, analysis, and prioritization.
Discovery
Start with broad topics your audience cares about. These can come from products, services, sales calls, customer support questions, competitor pages, or internal subject matter experts.
A seed keyword can be simple. “Email marketing,” “CRM software,” or “keyword research tools” all work as starting points. The job at this stage is to collect possible directions.
Analysis
Keyword validation uses search volume and ranking difficulty data. At this stage, SEO pros check whether people search for the topic, whether the SERP matches the intended content type, and whether the site has a realistic path to ranking.
Search volume helps size the opportunity. Difficulty helps estimate effort. SERP review shows what Google already rewards.
Prioritization
Turn the list into decisions. Some keywords deserve a new blog post. Some belong on an existing page. Some should become comparison pages, glossary entries, product pages, or supporting cluster content.
A good keyword map should show the target keyword, intent, funnel stage, current ranking page, target page, supporting terms, and next action.
How I Tested the Best Keyword Research Tools
Data Quality and Depth
I looked for search volume, keyword difficulty, CPC, trend data, intent labels, SERP analysis, competitor insights, keyword grouping, and export options. The strongest tools do more than show keyword ideas. They help you evaluate those ideas.
Usability and Workflow
I looked for fast search, clear filters, clean exports, sensible grouping, and workflows that help marketers compare keywords without opening ten tabs.
Value for Free Users
Free keyword data is often directionally useful but less comprehensive than paid data. That doesn’t make it useless. It just means marketers should avoid treating free estimates as a perfect answer.
So, I looked at free search limits, access to essential metrics, upgrade transparency, and whether the tool gives a beginner enough data to make a reasonable content decision.
Best Free Keyword Research Tools for SEO
Free keyword research tools work best as a stack. One tool helps beginner marketing teams brainstorm. Another validates demand. Another shows real performance after publication.
Here’s how to use them without turning your workflow into a browser tab graveyard.
Brainstorming Tools
1.
Google Trends is useful when SEO specialists need to know whether interest is rising, falling, seasonal, or region-specific. Google Trends lets users compare up to five groups of terms at once and up to 25 terms in each group.
This is not the tool I’d use to build a final keyword list. But it is the tool I’d use before committing to one angle over another. For example, if you are deciding between “AI SEO” and “answer engine optimization,” Google Trends can show whether one term is gaining search interest faster.
SEO specialists will also be able to find related search terms that they can use to add more value to your content because Google Trends shows queries people also searched with “AI SEO.”
All in all, I love Google Trends for a quick confirmation of a keyword’s validity and a quick drill-down to related, relevant terms.
Best for: Comparing topic interest, seasonality, and regional demand.
Pricing: Free
2.
Keyword Tool.io is a pretty rudimentary online keyword research tool that uses autocomplete data to generate keyword ideas. The free version can generate more than 750 keywords from Google autocomplete and supports more than 190 Google domains and more than 120 languages.
This makes it useful for expanding a broad seed keyword into more specific phrasing. If your seed keyword is “CRM software,” autocomplete might surface terms around small business CRM, sales CRM, CRM examples, and CRM integrations.
If all you want are keyword suggestions and ideas, then I think it’s a great option. But pair it with a validation tool before prioritizing topics.
Best for: Finding autocomplete-based long-tail keywords across search platforms.
Pricing: Free version available with limited keyword metrics.
3.
Ryan Robinson’s free tool helps users find blog ideas, low-competition keywords, monthly search volume, and ranking difficulty. Its biggest advantage is simplicity. A beginner can type in a seed keyword, scan related ideas, and start seeing which topics might be easier to pursue.
I recommend using it when SEO pros need a quick first pass for blog topics and don’t want to start inside a dense enterprise SEO platform.
Best for: Beginner-friendly blog keyword ideas with basic demand data.
Pricing: Free.
4.
Ahrefs Free Keyword Generator provides keyword ideas for Google, Bing, YouTube, and Amazon, along with monthly search volume and keyword difficulty scores.
Being a small business owner of a retro store with Japanese and German film cameras, I use Ahrefs Keyword Generator to get a snapshot of current brand demand. This task goes beyond SEO and directly impacts my store’s profit. I also like this tool for question mining. A broad term like “film camera” can quickly turn into question-based ideas that I later turn into social posts or videos.
This section is also useful for FAQs, beginner guides, and supporting articles in a topic cluster.
Best for: Fast keyword and question discovery with basic SEO metrics.
Pricing: Free.
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Validation Tools
5.
Google Keyword Planner helps users discover new keywords, upload keywords for search volume and forecasts, estimate costs, and organize keyword plans.
The tool is built for advertisers, so SEO teams should use it carefully. Competition and cost metrics reflect paid search, not organic difficulty. Still, it is useful for checking whether a keyword has meaningful demand.
Important note: You need to set up an AdWords account to use Keyword Planner, but that doesn’t mean you have to create or spend money on an ad.
Google will try to funnel you into creating your first ad, providing step-by-step directions. You can bypass this by selecting “back” and “skip” until you are prompted to set up your account. After playing with it, I discovered that while you do need to put in a payment method, you do not need to spend money.
To get started, choose the “Discover new keywords option.”
Then, type in some basic information about your business and enter your URL.
When you input keywords and your website address into Keyword Planner, Google generates a list of related keywords along with simple metrics to gauge how fierce the competition is around each one and how many searches it gets on both a global and local search level.
It’ll also show you historical statistics and information on how a list of keywords might perform — and it’ll create a new keyword list by multiplying several lists of keywords together.
You can choose the ideas you like most or that best fit your business. Then select “Add keywords” to save them so you can streamline what you’re looking for.
Best for: Validating search demand with Google Ads data.
Pricing: Free.
6.
WordStream’s free keyword tool provides keyword suggestions, search volume, and competitive data. Users can get hundreds of relevant keyword suggestions tailored by industry and location, with keyword volume and cost per click data. This makes WordStream useful for small businesses and marketers who want a practical view of search demand and paid competitiveness.
Although the tool returns quality data, I’m not a big fan of its outdated interface.
Best for: Quick keyword validation across SEO and PPC.
Pricing: Free.
7.
Semrush’s free keyword tools show monthly search volume, keyword difficulty, search intent, CPC, and geographic breakdown. Small marketing teams use Semrush’s free tools to compare search volume, difficulty, and intent before building a content plan.
I love how detailed the reports are, but the results are limited to 10 rows. So it’s only useful for a quick term check. To unlock more rows, marketers have to purchase a paid plan.
Best for: Validating keywords before upgrading to a paid Semrush workflow.
Pricing: Free limited access.
SEO Analysis Tools
8.
Google Search Console explains performance metrics such as impressions, position, and clicks. Google also lets users export performance data into Google Sheets, Excel, or CSV, including tabs for queries, pages, countries, devices, search appearance, and dates.
In my opinion, Search Console is the most honest keyword tool because it shows what your site actually earns in positions, impressions, and clicks.
Best for: Tracking real keyword performance after your content is published.
Pricing: Free.
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- And more!
Best Paid Keyword Research Tools for SEO
Paid SEO research tools are built for scale. They usually have vast databases, competitor research, SERP analysis, export options, rank tracking, and team workflows that free tools cannot fully match.
Brainstorming and Content Planning Tools
9.
Semrush helps content marketers and SEO pros explore keyword groups, assess subtopic search volume and average difficulty, discover related keywords, and filter by metrics like intent, trend, CPC, difficulty, and SERP features.
Semrush is the best for organic SEO keyword research when SEO pros turn thousands of terms into clusters, compare intent, and find content gaps across competitors.
I use Semrush to develop content calendars, topic clusters, and for competitor keyword expansion. But before I even dove into keyword research, Semrush did a quick analysis of my site and gave me some new “low-hanging fruit” search terms that could drive good traffic. So, I absolutely love that.
Best for: Building large keyword lists and filtering by intent, difficulty, and SERP features.
Pricing:
- SEO Toolkit Pro: $139.95/month
- SEO Toolkit Guru: $249.95/month
- SEO Toolkit Business: $499.95/month
10.
Ahrefs Keywords Explorer helps SEO teams estimate ranking difficulty, see search volume, review SERPs, evaluate traffic potential, and cluster keywords by Parent Topic or related terms. Ahrefs Keywords Explorer is similar to Semrush but offers additional features and a more intuitive design.
Ahrefs is strong when marketers want to understand why a page ranks. The SERP view, traffic potential, backlink context, and parent-topic data help marketers decide whether a keyword warrants its own page or should support a broader topic.
Content marketers can get ideas in keyword clusters, which can make it easier to write content that fits specific themes and aligns with your business goals.
Best for: SERP-led keyword research and competitive analysis.
Pricing:
- Starter: $29/month
- Lite: $129/month
- Standard: $249/month
- Advanced: $449/month
- Enterprise: $1,499/month.
11.
HubSpot’s SEO software helps teams plan SEO strategy, optimize content, and measure ROI. Users can view SEO recommendations in HubSpot and analyze SEO performance with Google Search Console-connected data.
For example, HubSpot provides SEO recommendations ranked by priority to show which optimizations will have the biggest impact. See exactly which pages need updating, what actions to take, and watch your site’s rank improve.
糖心Vlog teams use HubSpot SEO Tools when SEO needs to connect to content publishing, lead generation, conversion strategy, and performance reporting in one system.
Best for: Teams that want SEO planning, optimization, and performance tracking inside HubSpot.
Pricing:
- 糖心Vlog Hub Starter: $7/month/seat
- 糖心Vlog Hub Professional: $800/month
- 糖心Vlog Hub Enterprise: $3,600/month
Validation and Competitive Research Tools
12.
SE Ranking works well for teams that want practical SEO operations without the higher starting price of some enterprise platforms. It combines keyword tracking, keyword research, SEO audits, reporting, and AI visibility options.
Every time I look into SE Ranking, I’m thoroughly impressed by the depth of its insights and capabilities. There’s not an aspect of SEO that SE Ranking doesn’t cover.
Their aptly named Keyword Suggestion Tool is a comprehensive keyword analytics tool that lets SEO specialists investigate organic and paid search competitors, monitor SEO and PPC campaigns, and generate thousands of suggestions to expand their keyword list.
To give you a sense of how it works, I typed in “coffee machines” and got the following analysis of that search term.
From there, I scrolled further down the page and got several categories of keyword ideas along with the top-ranking sites.
Use it when rank tracking and reporting are central to your SEO workflow.
Best for: Teams that want keyword research, rank tracking, and simple website audits in one SEO platform.
Pricing:
- Core: $129/month
- Growth: $279/month
- Enterprise: custom pricing
13.
Ubersuggest is a beginner-friendly keyword research tool easier for non-specialists to start using than dense SEO suites, but advanced teams may outgrow the limits and data depth fast. Ubersuggest has a suite of simple tools for AI keyword research, competitor analysis, site audit, traffic estimation, SERP analysis, and rank tracking.
What caught my attention is the AI prompt ideas for a given keyword. 糖心Vlog teams may discover content opportunities by investigating the report more closely.
Best for: Beginners and small site owners who need affordable keyword research plus basic SEO tools.
Pricing:
- Individual: $29/month
- Business: $49/month
- Enterprise: $99/month
14.
Serpstat includes Keyword Research, Site Analysis, Rank Tracker, Site Audit, and Backlink Analysis. It has vast keyword databases across Europe and an affordable API for US databases. Higher tiers add limits, AI tools, batch analysis, scheduled reports, and more.
I had a super positive first impression of Serpstart because the company makes it easy to take a peek under the hood. The no-credit-card free trial allowed me to dive right in with a simple Google login. That alone wins brownie points with me. I selected “Freemium,” but paid goes way further.
Right off the bat, I did a search for “how to market my business” and got 10 related keywords.
Each search term is clickable and allows me to go deeper down the rabbit hole of search ideas based on historically profitable keywords.
Serpstat could improve its usability. You’ve got to make unnecessary clicks here and there to get the data. However, an affordable price justifies some inconveniences.
Best for: Affordable all-in-one SEO research, rank tracking, and audits.
Pricing:
- Individual: $50/month
- Team: $100/month
- Team x2: $169/month
- Agency: $410/month
Keyword Research Template
Build your SEO strategy with this free template.
- Search Volume
- CPC
- Ranking
- Keyword Difficulty
Download Free
All fields are required.
Form not available
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Click this link to access this resource at any time.
Analysis and Rank Tracking Tools
15.
AccuRanker is a solid rank tracker that includes daily updates, keyword research, search intent, tagging, advanced filtering, Google Search Console and Google Analytics integrations, reporting, and export. AccuRanker is commonly used by agencies, consultants, and in-house SEO teams that need rank tracking at scale.
If you want to put it to the test, you’ve got to do extra work. AccuRanker doesn’t provide a free trial or a freemium. Marketers have to request a demo just to take a look at it. Personally, I find that pretty inconvenient.
Best for: Rank tracking, SERP visibility, and reporting.
Pricing:
- Professional: $224/month
- Expert: $764/month
- Enterprise: custom pricing for more than 25,000 keywords.
Best Prompt Tracking Tools for AEO
AEO depends on how good your on-page SEO is — and, at the same time, is the “beyond the keyword” layer of search strategy. If marketing teams stick to AEO best practices, their companies will be cited by answer engines. To monitor these changes, teams need a complementary AEO prompt tracking tool.
1.
HubSpot AEO provides visibility score, prompt tracking, competitor comparisons, citation analysis, prioritized AEO recommendations, and coverage rates across ChatGPT, Gemini, and Perplexity.
HubSpot AEO also shows marketers which answer engines cite the brand, and which content gaps to address. With HubSpot AEO, content teams clearly understand which sources and content types answer engines cite most.
Moreover, HubSpot AEO analyzes competition changes in answer engines by selected prompts and keywords, and creates tailored recommendations to improve your AI visibility and sentiment. If HubSpot AEO notices that answer engines refer to competitors’ social media content, it recommends social content for those content gaps.
Being an in-house product first, HubSpot AEO helped our marketing team with a 1,850% lift in qualified leads from AI with 3x better conversions.
Best for: HubSpot customers who want AI visibility, prompt tracking, citation analysis, competitor research in answer engines, and AEO recommendations connected to execution.
Pricing:
- A 28-day free trial
- HubSpot AEO: $50/month
2.
Semrush AI Visibility Tool shows users how brands appear in AI-generated answers and analyzes their brand perception and sentiment compared to competitors. I recommend using it when the SEO team already lives in Semrush and wants to add prompt monitoring.
Best for: Tracking AI search visibility and prompts alongside Semrush SEO workflows.
Pricing:
- AI Visibility Toolkit: $99/month
How to Do Keyword Research With Free Tools: A Step-by-step Process
I’ll show you how to build a useful keyword workflow without a premium subscription. The trick is to give every tool one job. Use free tools to generate ideas, expand your keyword list, validate demand, check competition, and map keywords to content. Leave paid tools for scale, reporting, or when competitive depth becomes the bottleneck.
Step 1: Generate seed keywords.
Start with broad topics tied to your product, audience, or content category. If you sell email marketing software, seed keywords could include “email automation,” “newsletter software,” “email segmentation,” and “abandoned cart emails.”
Use ChatGPT here to speed up keyword ideation, but treat it as a brainstorming assistant. Ask it to suggest seed keywords from customer pain points, jobs to be done, product categories, competitor categories, and beginner questions.
A useful prompt for generating seed keywords:
“Generate seed keywords for a B2B email marketing software company. Group them by beginner education, product comparison, use case, integration, and purchase intent.”
Then check those ideas in Google Trends, Ryan Robinson’s tool, or Ahrefs Free Keyword Generator for search volume.
Step 2: Expand your keyword list.
Next, turn seed keywords into related searches, long-tail phrases, and questions. Use tools like Keyword Tool.io to generate long-tail keywords. Look at related searches in Ahrefs Free Keyword Generator or Semrush Free Keyword Tool.
For “email automation,” you might find:
- email automation examples
- email automation for ecommerce
- email automation workflows for B2C
- best email automation software for B2B
- how to automate welcome emails with HubSpot
Step 3: Validate search demand.
Now check whether the expanded terms have enough demand to deserve attention, unless you used Ahrefs Keyword Generator (it shows search volume by default).
Use Google Keyword Planner, WordStream, or Semrush Free Keyword Tool to check search volume, keyword difficulty, CPC, and search intent. Don’t discard low-volume keywords. They generate more traffic due to low competition — especially if a keyword has high purchase intent, supports a product page, or answers a question your sales team hears often.
Step 4: Analyze the competition.
Before creating a page or an article, look at the top-ranking pages. Analyze the content type and the page structure.
- Are those pages beginner guides, product pages, listicles, videos, tools, or glossaries?
- Are small sites ranking, or is the SERP dominated by large publishers and software brands?
- Does the SERP include AI Overviews, People Also Ask, videos, or shopping results?
- Do pages contain multimedia elements, FAQs, and product CTAs?
Then compare your content idea to the SERP. If every ranking result is a product category page, a blog post may struggle. If every result is a beginner guide, a bottom-of-funnel landing page may miss intent.
Use website research tools for deep competitive research.
Step 5: Map keywords to content.
A content map tells content teams what page should target each keyword, what intent that page should satisfy, and what action they need to take next. A keyword map also prevents intent overlap — also known as , where multiple blog posts are competing for the same keyword.
To begin keyword mapping, start with a simple Google Sheet. Add one keyword per row, then fill in these columns:
- Primary keyword
- Search intent
- Funnel stage
- Monthly volume
- Ranking difficulty
- Current ranking URL
- Target URL
- Supporting keywords
- SERP notes
- Next action
Here’s a practical workflow on how to decide what each keyword becomes:
- If the keyword has a different intent, give it a separate page. For example, “email automation examples” and “best email automation software” should usually be different pages because one searcher wants inspiration and the other is comparing tools.
- If the keyword is a close variation, keep it on the same page. For example, “email automation examples,” “automated email examples,” and “email workflow examples” can usually support one strong examples article.
- If you already have a page ranking for the keyword, update and improve that page before creating a new one.
- If two pages target the same intent, choose one primary page and merge or redirect the weaker one.
- If the keyword is useful but too narrow for a full article, use it as a section, FAQ, comparison table, or definition block inside a larger page.
Pro tip: Use ChatGPT to group keywords into pages. Feed it your keyword list, intent notes, and current URLs, and ask to cluster them. Review the output.
HubSpot SEO 糖心Vlog Software
Build your authority in search with tools that help you plan your SEO strategy, optimize your content, and measure ROI.
- Get SEO recommendations.
- Create an optimized content strategy.
- Build search authority.
- And more!
Pro Tips for Maximizing Free Keyword Research Tools
The free keyword research tools on this list can take websites far if marketers combine them well. The goal is not to squeeze enterprise data out of free SEO software, but to make better early decisions before paying for scale.
For beginners: Build your first keyword list.
Start with competitor inspiration. Pick three sites in your category and write down their main product pages, blog categories, glossary pages, and comparison pages.
From there, use free tools to expand the keyword list and validate search intent. Google Trends can compare broad topics. Ahrefs Free Keyword Generator can surface questions. WordStream can show volume and competition. A beginner workflow should be simple:
- Choose five seed topics.
- Generate 20 keyword ideas per topic.
- Validate volume and difficulty.
- Pick one primary keyword per page.
- Add three to five supporting terms.
That is enough to start building a website.
For beginners: Prioritize keywords by business usefulness.
After the keyword list is completed, add a simple priority score to avoid chasing volume only. Use three questions to assign the right score:
- Does this keyword match something we sell or explain well?
- Can we create a better page than the current results?
- Would a visitor from this search be useful to the business?
Score each keyword from 1 to 3 for each question. A keyword with lower search volume but a strong business fit can deserve attention before a high-volume keyword with vague intent.
For content creators: Find hidden long-tail gems.
Long-tail keywords are often more specific, easier to match, and closer to the way people ask questions. Plus, AI Overviews mostly appear for long-tail informational queries, according to . That makes long tail research essential for both SEO and AEO.
Look for question patterns, comparison phrases, and problem-based searches. Use People Also Ask, autocomplete, Ahrefs Free Keyword Generator, Keyword Tool.io, and Search Console to query data.
For example, the topic “keyword research tools” can become:
|
Long tail keyword |
Content angle |
|
Free keyword research tools for beginners |
Beginner tool list |
|
How accurate are free keyword tools |
FAQ or comparison section |
|
Keyword research tools for small businesses |
Small business buying guide |
|
How to map keywords to content |
Step-by-step workflow |
|
Keyword research for AI search |
AEO focused section |
Good long-tail keywords often start with words like “how,” “what,” “best,” “examples,” “template,” “for small business,” or “vs.” They usually reveal the content format the searcher wants.
For content creators: Add answer blocks to existing pages.
Once you find long-tail questions, don’t always create a new article. Many question keywords work better as answer blocks inside existing pages. Use this workflow to find those keywords for a content refresh:
- Choose one existing page that already gets impressions in Search Console.
- Export the queries for that page.
- Find question keywords where the page appears but earns few clicks.
- Add a short answer block under a relevant H2 or H3.
- Add examples, steps, or a small comparison table if the question needs more context.
For example, if a page about “keyword research tools” gets impressions for “how accurate are free keyword research tools,” add an FAQ section with a direct answer. Then explain when free data is useful and when paid data is safer.
For advanced users: Stack free tools into a real validation workflow.
Advanced keyword research is less about one tool and more about sequencing. Start with Ahrefs Free Keyword Generator for keyword and question expansion. Use the Semrush Free Keyword Tool for demand validation. Check Search Console for existing impressions. Then manually review the SERP to confirm intent and competition.
If the keyword survives all four checks, it’s more likely to deserve a brief. This workflow is slower than exporting one massive list, but it leads to better choices.
For advanced users: Run a query fan-out audit.
AI search makes advanced keyword research less linear. Google AI Overviews and AI Mode may use query fan-out, meaning the system can issue multiple related searches across subtopics and data sources to build a response.
For SEO, it means that one important page shouldn’t only target the main keyword. It should also answer the related questions a searcher may ask next.
For advanced users: Track performance without premium tools.
Track early SEO performance with Google Search Console and Google Sheets. Google Search Console’s Performance report shows clicks, impressions, click-through rate, average position, queries, pages, countries, devices, search appearance, and dates.
Export queries and pages to Google Sheets. Track impressions, clicks, average position, click-through rate, and the target URL for each keyword group. Then sort the report by opportunity:
- High impressions and low clickthrough rate mean the title or meta description may need work.
- An average position between five and fifteen means the page may need content depth, internal links, or freshness.
- Rising impressions with low clicks may mean the topic is gaining demand, but your snippet is not winning attention.
- Queries that appear unexpectedly can become new supporting sections or new articles.
Also, conduct technical SEO audits of your site with SEO analysis tools since technical issues impede search rankings.
For advanced users: Future-proof your strategy for AI search.
AI search rewards narrative clarity, so it’s easy for bots to understand, extract, and cite the website’s information. For SEO and AEO, that means your pages need to answer the main query and the natural follow-up questions around it. Free keyword tools will help you find those related terms.
AirOps says structured across all large language models. So next, incorporate keywords into headings and use natural question phrasing. Lead with concise definitions that deliver value right off the bat. Include real-life examples. Structure sections with clear headings from H2s to H4s. Show comparison tables where they help readers decide and skim information.
Pick five to ten high-intent queries and track them in ChatGPT, Gemini, and Perplexity manually once per month. Track which brands are mentioned, which URLs are cited, which content formats appear, and which third-party sources influence the answers.
Alternatively, use to track the prompts that matter to your business, monitor your brand visibility across ChatGPT, Gemini, and Perplexity, and get prioritized recommendations to improve your share of voice in AI search.
Frequently Asked Questions About Keyword Research Tools
How accurate are free keyword research tools?
Free keyword research tools are useful for direction, not precision. They can show whether a topic has demand, whether a phrase looks competitive, and whether related questions exist. They are less reliable when you need exact volume, full competitor data, historical trends, or large-scale exports.
Use free data as a signal. If two or three tools point in the same direction, you can make a reasonable early decision. If the keyword matters to revenue, validate it again with Search Console data, SERP review, or a paid tool.
Can I do effective SEO with only free keyword research tools?
Yes, especially if you are a beginner, small business, solo creator, or an early-stage team. Free tools can help you find seed keywords, expand ideas, validate basic demand, review the SERP, and track real performance after publishing.
Free tools become limiting when you need to scale. Paid tools are better for competitor gaps, rank tracking, large exports, historical data, keyword clustering, advanced filtering, and team reporting.
What is the difference between free and paid keyword research tools?
Free keyword tools usually help with a narrow task: brainstorm ideas, check basic demand, compare trends, or review your own Search Console data. They are excellent for starting and for small, focused projects.
Paid tools usually provide larger keyword databases, deeper SERP analysis, competitor research, rank tracking, automation, exports, collaboration, and reporting. They save time when keyword research becomes a repeatable team workflow.
How do I choose the right keyword research tool for my needs?
Choose based on workflow, not popularity. Beginners should start with Google Trends, Ahrefs Free Keyword Generator, WordStream, and Google Search Console. Content creators should add tools that surface questions and long-tail phrases. SEO teams should prioritize SERP analysis, competitor data, exports, and rank tracking.
HubSpot customers should consider when optimization and performance tracking need to connect to content, campaigns, contacts, and conversion strategy. Teams investing in AI visibility should look at , which tracks prompts, citations, and competitor mentions.
Which keyword research tool is best for beginners?
The best beginner setup is a small stack: Google Trends for direction, Ahrefs Free Keyword Generator for ideas, WordStream for quick validation, and Google Search Console for real performance data.
Once that workflow feels too manual, upgrade based on the gap. If you need competitor research, try Ahrefs or Semrush. If you need rank tracking and reporting, consider SE Ranking or AccuRanker. If your team works inside HubSpot, use to connect optimization with campaign performance.
Start your keyword research with better data.
Keyword research gets easier when every tool has a clear job. Start with seed keywords. Expand them into related searches and questions. Validate demand with search volume and ranking difficulty. Review the SERP. Then map every keyword to a real page, update, cluster, or FAQ.
Free keyword research tools are enough to build your first useful list, especially if you’re working with a small site, a limited budget, or an early content strategy. Once you need deeper competitor data, larger exports, rank tracking, or team workflows, paid keyword analysis software will save time and reduce guesswork.
And if AI answers are already affecting how buyers discover your brand, add AEO tracking to the workflow. HubSpot SEO Tools can help teams optimize and measure content performance, while HubSpot AEO shows where your brand appears in AI answers, which sources get cited, and what to improve next.
Editor’s note: This post was originally published in August 2011 and has been updated for comprehensiveness.
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Keyword Research
