Free Topic Cluster Maker
Type one topic. Get a hub and spoke plan: your topic as the pillar page, with about 20 supporting article ideas in named groups around it.
How to use the topic cluster maker
Real screenshots of the current tool, using sample inputs. Long results are shown as a preview.
- 1
Type one topic
Type the subject you want to cover, or click one of the example topics under the box.
- 2
Check the topic and run it
Here the Email marketing example is in the box. Whatever you type becomes the pillar page of the plan. Click Generate cluster.
- 3
Review the result
Select Generate cluster to run the tool. This screenshot shows the result returned for the sample input.
What is a topic cluster?
A topic cluster is a group of pages on one subject, linked together. One pillar page covers the topic broadly. Supporting articles, the spokes, each go deep on one part of it. The pillar links out to every article and every article links back, so readers and search engines can see the whole subject is covered and how the pages fit.
Planning a cluster before you write stops you from publishing twenty unrelated posts, or three posts that answer the same question and compete with each other. You decide the pillar, the groups and the articles first, then write to the plan.
A real example: "Email marketing"
This is one run of this tool on the topic email marketing, exactly as it came back: 20 ideas in 5 groups. Run it yourself and the ideas will differ a little.
Beginner Guides & Fundamentals
- what is email marketing and how does it work
- email marketing for beginners step by step guide
- how to build an email list from scratch 2025
- email marketing basics definitions and best practices
Tools, Software & Platforms
- best email marketing software for small business
- mailchimp vs activecampaign for ecommerce
- free email marketing tools for startups
- top klaviyo alternatives for shopify stores
Actionable Optimization & Strategy
- how to improve email open rates fast
- email marketing automation workflow examples
- how to avoid email spam filters and improve deliverability
- advanced email segmentation strategies for b2b
Creative Assets & Templates
- welcome email series sequence examples
- high converting sales email subject lines
- responsive html email newsletter templates
- abandoned cart email templates that convert
ROI, Metrics & Governance
- average email marketing roi by industry 2025
- key email marketing metrics and kpis to track
- gdpr and can-spam compliance checklist for email marketers
- how to calculate email unsubscribe rate benchmark
Each group is a part of the pillar
The five groups make a natural outline for the pillar page: basics, tools, strategy, templates and measurement, each with a short section that links to its articles.
Two ideas came back with a year
"how to build an email list from scratch 2025" and "average email marketing roi by industry 2025". Update or drop the year before you publish, and keep it out of the URL.
Some ideas need a check
"how to calculate email unsubscribe rate benchmark" mixes a calculation with a benchmark, which are two different searches. Look ideas like that up before you write them.
How this tool builds your cluster
Four things happen between Generate cluster and the result. Here is exactly what each one does.
- 1
Your topic goes to an AI model
The page sends the topic you typed, and nothing else, to Grigora's API, which passes it to an AI model.
- 2
The model suggests ideas in groups
Its instructions ask for 15 to 25 keyword ideas covering questions, comparisons, beginner and advanced angles and different search intents, grouped by theme and intent. It names the groups itself.
- 3
The page tidies the answer
A repeated idea is shown once, empty groups are dropped, and a note in a group name such as (Informational) is shown under the name.
- 4
You get the plan
Your topic sits in the middle as the pillar page. The inner ring holds the groups and the outer ring the ideas. Copy it as an outline, paste it into Google Sheets, or download a CSV or the map as a PNG.
Topic cluster maker or keyword clustering tool?
Grigora has two free clustering tools. They start from different places, and work best one after the other.
Topic Cluster Maker
- You start with
- One topic, and no keyword list yet
- You get
- A pillar page and about 20 article ideas in named groups, on a map
- Best for
- Planning a new site or section, a content calendar, or deciding what to write next
Keyword Clustering Tool
- You start with
- A list of keywords you already have, from Search Console or an SEO tool
- You get
- Those keywords grouped into page-sized clusters, each with a search intent and a head keyword
- Best for
- Turning keyword research into pages, and finding keywords that belong on one page
Using both: plan the pillar and its groups here, research real keywords for each article idea, then paste that keyword list into the keyword clustering tool to see which ideas are really one page.
How to build a topic cluster
From one topic to a pillar page and articles that support each other.
- 1
Pick a pillar topic
Broad enough for 10 or more articles, narrow enough for one page to cover well. "Email marketing" works; "marketing" is too wide; "welcome emails for yoga studios" is an article, not a pillar.
- 2
Generate the cluster
Type the topic above and click Generate cluster. You get about 20 article ideas in named groups around your topic.
- 3
Check the ideas against real searches
Look up the ideas you like in Google, Search Console or your keyword tool. Drop the ones nobody searches for, and remove any year an idea came back with.
- 4
Merge ideas one page can answer
Two ideas that want the same page are one article. Paste your keyword list into the Keyword Clustering Tool to see which ones belong together.
Open the Keyword Clustering Tool - 5
Write the pillar page
Cover the whole topic at a useful depth, with a short section for each group that links to its articles.
- 6
Write the articles and link them
Each article links back to the pillar with anchor text that names the topic, and to articles in the same group where that helps the reader.
- 7
Measure in Search Console
Filter the Performance report by the cluster's pages and watch impressions and clicks over the following months, not days.
Six common shapes of topic cluster
Different pillars suit different clusters. Knowing the shape tells you what kind of articles to plan.
Guide clusters
A broad guide as the pillar, with articles that answer the how, what and why questions around it. Suits topics people are still learning about.
Buyer clusters
A product or service category as the pillar, with articles that compare options, explain features and cover use cases.
Local clusters
A service as the pillar, with a page for each real service area or service variant you offer.
Problem clusters
A troubleshooting hub as the pillar, with an article for each specific problem or error people hit.
Comparison clusters
A category overview as the pillar, with articles that compare two products head to head.
Glossary clusters
An index of terms as the pillar, with an article that explains each term in depth with examples.
How to link a topic cluster
The internal links are what turn a set of articles into a cluster. Five rules cover most of it.
- The pillar links to every article in the cluster, usually from the section that covers its group.
- Every article links back to the pillar near the top, with anchor text that names the topic.
- Articles in the same group link to each other where a reader would want the next step. Skip links that are only there for search engines.
- Anchor text says what the linked page is about. "Click here" and "read more" tell nobody anything.
- Every page in the cluster can be reached from your menu or the pillar. An article nothing links to is an orphan.
What the links look like in HTML
Any website builder or CMS produces the same thing in the end: a list of links on the pillar, and a breadcrumb and an in-text link on each article.
<!-- On the pillar page: one section per group, linking to its articles -->
<section>
<h2>Email marketing tools</h2>
<p>A short summary of what this group covers.</p>
<ul>
<li><a href="/email-marketing/best-email-software/">Best email marketing software for small business</a></li>
<li><a href="/email-marketing/mailchimp-vs-activecampaign/">Mailchimp vs ActiveCampaign</a></li>
</ul>
</section>
<!-- On each article: a way back to the pillar -->
<nav aria-label="Breadcrumb">
<a href="/">Home</a> / <a href="/email-marketing/">Email marketing</a>
</nav>
<p>This article is part of our <a href="/email-marketing/">email marketing guide</a>.</p>8 topic cluster mistakes
What goes wrong most often when a cluster plan becomes pages, and how to fix each one.
A pillar that is too broad
highNo single page can cover "Marketing" or "SEO". Narrow it to one area, such as "Email marketing" or "Technical SEO", that holds 10 to 20 real articles.
Articles that compete with the pillar
highEach article answers a narrower question than the pillar. If an article targets the pillar's main keyword, the two pages compete and one of them loses.
No link back to the pillar
highThe links are what make pages a cluster. Without a link from each article to the pillar, readers and crawlers cannot see that the article belongs to it.
Publishing every idea you are given
highIdeas from any generator, this one included, are suggestions. Check each against real searches, merge the ones that want the same page, and drop the rest.
Two articles for one search
high"best email subject lines" and "top email subject lines" are the same search. Write one article. The Keyword Clustering Tool shows which keywords belong on one page.
Mixing intents on one page
medium"how to set up a welcome email" is someone learning; "best email automation software" is someone comparing. They want different pages, even when they sit in one group.
Generic anchor text
mediumReplace "click here" with words that name the linked page, such as "email deliverability checklist".
Dates that go stale
lowKeep years out of article titles unless the year is the point, and out of URLs always. A year in the slug dates the page the moment it turns over.
Grigora vs Frase vs a spreadsheet
If you want topic research that reads Google's results and writes the drafts too, a paid tool earns its price. For a fast first plan from one topic, this free tool is enough.
| Grigora (this tool) | Frase Topic Clusters | A spreadsheet by hand | |
|---|---|---|---|
| Price | Free | From $39 a month, billed yearly | Free |
| Try it free | Yes, no signup | 7 day free trial, no card | Not applicable |
| You start from | One topic you type | A pillar page you pick, plus the pages ranking for your topic | Your own keyword research |
| What you get | About 20 article ideas in named groups, on a two-ring map | A cluster map around your pillar, with missing subtopics and briefs | The plan you build |
| Reads Google results | No | Yes, the results ranking for your topic | Only if you check them |
| Drafts the content | No. Grigora's AI website builder can draft site pages from the plan | Yes, in the same workspace | No |
Frase's price, trial and features as listed on its own Topic Clusters page on October 31, 2026. Check its site for current terms.
The cluster is the plan. Grigora builds the site.
Describe your business and Grigora's AI drafts the site: the pages, the copy and the images. Then change anything by asking, with the SEO basics already in place.
Pages drafted from your plan
Build a site from this plan, under your results, gives the AI builder your groups as the page plan. Edit any page afterwards by describing the change in the AI Editor.
A blog for the supporting articles
Keep articles in a CMS collection with its own index page and a page for every post. Add posts by asking the AI Editor or from the dashboard.
SEO basics built in
The AI writes page titles and descriptions. A sitemap, robots.txt, Search Console verification, keyword research and a site checkup come with every site, plus built-in analytics.
Related free SEO tools
Plan the cluster, research the keywords, then brief and build the pages.
Keyword Clustering Tool
Group a keyword list into page-sized clusters
Question Keyword Generator
Find the questions people ask on a topic
Long-Tail Keyword Generator
Expand a seed keyword into longer variants
Keyword Intent Classifier
Label the search intent of each keyword
Content Brief Generator
Write a brief for each article
Website Page Planner
Work out which pages your site needs
Frequently asked questions
Topic clusters, this tool, and what to do with the result.