The 9 Best Keyword Clustering and Grouping Tools for SEO in 2024

With every new core algorithm update, Google gets better at understanding search intent and delivering the most relevant results. So as SEOs, we need to ensure our content properly targets user queries and provides comprehensive information.

Keyword clustering and grouping is an advanced tactic that involves categorizing semantically related keywords together. The goal is to create content around topic clusters rather than individual keywords.

This strategy comes with several benefits:

  • You can target many more relevant keywords in each piece of content.
  • Your posts will be more in-depth and useful for readers.
  • It’s easier to build internal site architecture and content silos.
  • Ranking becomes more sustainable long-term.
  • Requires less ongoing content creation.

By leveraging keyword clustering tools, you save tons of time versus doing this manually. The right software can analyze keyword lists and accurately identify logical groupings.

In this post, we’ll cover the top 9 options for SEO keyword clustering tools in 2024. I’ve used many of these firsthand over the past year.

Best Keyword Clustering and Grouping Tools

Why Keyword Clustering is Critical for SEO

Let’s briefly explain how keyword clustering improves your overall search optimization and rankings:

  • You can target more keywords without “over-optimizing.” By grouping related terms together, you can naturally optimize one piece of content for 5, 10, or even 20+ keywords. Without clustering, you’d need separate pages.
  • Your content matches search intent better. By covering all keywords for a specific topic, your content answers user queries more fully. Google rewards pages that satisfy intent.
  • It’s easier to link pages internally. With clear content silos built around keyword clusters, you can interlink related pages together for better architecture.
  • Each page has a clear purpose. When you build pages around clear clusters, the goal for that content becomes more defined.
  • Rankings are more sustainable. Compared to targeting just one keyword per page, rankings stick longer when you naturally optimize for groups of terms.

That covers the core benefits. Now let’s look at the top keyword clustering tools on the market this year.

1. Key Clusters

Key Clusters

Key Clusters revolutionizes the way we group keywords by utilizing real-time Google SERP data.

This tool stands out for its accuracy and simplicity, making it a favorite in the digital marketing sphere.

It integrates seamlessly with popular keyword research tools like Ahrefs or Semrush. Simply upload your keyword research file, and Key Clusters swiftly generates an Excel file organizing these keywords into precise clusters.

This feature is a game-changer for content creators, as it simplifies the process of generating relevant and targeted content.

What sets Key Clusters apart is its unique credit-based pricing model, earning it rave reviews on Capterra.

Unlike other tools that bind you to a monthly subscription, Key Clusters offers flexibility by allowing you to purchase credits as per your project needs.

This approach is especially beneficial for SEO professionals who typically process large batches of keywords in one session before shifting their focus to content creation.

The credit system aligns perfectly with such workflows, offering a more practical and cost-effective solution.

Pricing Model

Key Clusters uses a pay-per-credit system versus monthly subscriptions. This billing method is great if you only need to run clustering once in a while.



  • Credits never expire, so you keep full value.
  • Cost-effective billing, especially for one-off use.
  • Simple and intuitive tool.
  • Accurate results based on real Google data.


  • Less advanced features compared to some alternatives.

2. Keyword Insights

Discover the efficiency of Keyword Insights, an innovative tool combining keyword clustering with AI-powered content briefing. This fusion is ideal for crafting top-tier content effortlessly. Simply upload your keyword list, and watch as the tool adeptly groups them. Utilizing the generated report, you can swiftly create a content outline using the AI briefing feature. This tool eliminates the need for prolonged keyword research, competitor analysis, and tedious article revisions.

Setting itself apart, Keyword Insights offers a unique “done for you” service, ensuring unparalleled quality in your outputs. Its acclaim as the Product of the Day on Product Hunt speaks volumes. For those seeking a reliable alternative to keyword cupid, Keyword Insights comes highly recommended.


Keyword Insights offers monthly subscriptions based on the maximum keywords you need processed.


They also offer custom packages if your needs go beyond the plans.


  • The feature combination is perfect for building relevant briefs
  • Pay-as-you-go service based on your specific requirements


  • The output is formatted in a google sheet

3. Keyword Cupid

Keyword Cupid

Keyword Cupid stands out as a top contender in the realm of keyword clustering tools. Renowned for its ability to construct content silos from extensive keyword data, this software is a game-changer for content creators. Its claim to fame is the use of neural network models, aiming to reverse engineer Google’s Knowledge Graph in real-time, a claim substantiated by numerous positive reviews.

My personal experience with Keyword Cupid dates back to February 2022, yet I’ve yet to try all its features. The mind map tool, in particular, has been a highlight for me, offering a visual interpretation of data that enhances understanding. For those in pursuit of a keyword research and clustering tool that harnesses machine learning for superior results, Keyword Cupid is a top choice.


Keyword Cupid has tiered plans based on the number of keyword credits required per month. Each credit allows you to analyze one keyword.

PlanMonthly CreditsPrice/Month


  • Very advanced clustering based on neural networks.
  • Complete SEO toolkit insights.
  • Mind mapping for easy analysis.


  • Interface and visuals seem dated.
  • Requires training to master.

4. SE Ranking

SE Ranking

SE Ranking stands as a versatile, all-in-one SEO toolkit, boasting an impressive suite of keyword research tools. At the heart of its offerings is the “Keyword Grouper,” a fundamental clustering tool. This feature serves as an excellent starting point within the software, aiding in segmenting keywords and structuring your SEO plan efficiently.

What sets the Keyword Grouper apart is its ability to suggest keyword variations. It leverages semantic suggestions, synonyms, and related terms, empowering you to craft content that comprehensively addresses the same user intent. This capability is a significant factor in SE Ranking’s inclusion on this list, highlighting its potency in content strategy development.


SE Ranking offers monthly plans based on the number of keywords you want to track and group:

PlanPriceKeywordsKeyword Checks


  • Comprehensive SEO platform.
  • Great for grouping location/language specifics.
  • Adds relevant keyword suggestions.


  • Expensive if you only need clustering.
  • Steeper learning curve.

5. Cluster AI

Cluster AI

Cluster AI emerges as a formidable keyword grouping tool, boasting the potential to reduce keyword research time by an astonishing 90%. This tool is a part of the comprehensive Content Distribution suite, which includes notable tools like Workello and the Content Ops Framework. The philosophy at Cluster AI challenges conventional approaches to keyword research, advocating for a more streamlined process.

Integration is a breeze with Cluster AI; it seamlessly connects with popular keyword research tools such as Ahrefs, Moz, and Google Search Console, taking over the heavy lifting from there. What truly captures attention are the case studies. Cluster AI showcases three significant case studies, demonstrating its effectiveness over a 12-month period. These case studies provide compelling evidence of the tool’s impact, making it a noteworthy mention in this list.


Cluster AI offers monthly plans based on maximum keywords required:



  • All product features are backed up with real case studies
  • A lot of pricing options to help you get the best value for money
  • 500 keywords free in the trial


  • Lots of upsells to get you onto their other products
  • The platform is not intuitive (hard to use)

6. Zenbrief


Zenbrief stands out as a dynamic AI writing assistant, designed to accelerate the creation of high-quality content. This tool goes beyond simple writing assistance; it conducts thorough competitor research and employs the same Natural Language Processing (NLP) technology used by Google. This approach results in precise, actionable recommendations for content enhancement.

What makes Zenbrief particularly noteworthy in the realm of keyword clustering tools is its fee clustering feature. Simply input your keywords into a text box, activate the clustering tool, and watch as it efficiently organizes them into clear, easy-to-understand silos and clusters. This simple process provides a lucid roadmap for crafting your content.


Access to Zenbrief’s AI writing assistant plans start at $79 per month. This includes the free clustering.

PlanContent Briefs/MoPrice/Mo


  • Free clustering is a nice bonus.
  • Affordable entry price for AI writing.


  • For hobby use only.

7. Contadu


Contadu, a European SaaS tool, excels in delivering NLP (Natural Language Processing) recommendations to refine your content. A standout feature of Contadu is its focus on semantic keyword suggestions, an essential aspect of modern SEO strategies. While the product suite does not include a dedicated keyword clustering tool, it compensates with two notable free offerings.

The first tool, the keyword mixer, is adept at generating various permutations of specific keywords like ‘best’, ‘new’, ‘top’, and others, providing a diverse range of options for content optimization. Additionally, Contadu offers a keyword clustering and grouping tool, distinguished by its speed and accuracy. My experience with inputting hundreds of keywords into this tool resulted in rapid, precise grouping, showcasing Contadu’s capability in handling extensive keyword sets with ease.


The NLP content enhancement plans start at €19 per month. Keyword clustering is included free.



  • Very quick keyword grouping tool
  • The basic keyword grouping and clustering tools are free


  • The keyword mixing tool isn’t intuitive
  • Need to upgrade the plan to get access to the NLP

8. Surfer SEO

Surfer SEO

Surfer SEO stands out in the competitive landscape of AI writing and SEO tools, recognized both for its advanced capabilities and popularity. What sets its keyword clustering tool apart is its superiority over others mentioned in this list. This tool doesn’t just cluster keywords; it delves deeper, aggregating essential data like keyword volume and difficulty. It further enhances its utility by recommending additional semantic terms that should be included in these clusters.

This comprehensive approach allows for the creation of content that is not just well-structured but also optimized for the best chances of ranking. Surfer SEO’s robust feature set makes it a go-to choice for anyone serious about leveraging the power of AI in their SEO and content writing efforts.


Surfer SEO offers monthly plans based on the number of articles generated:



  • Next-level keyword and content analysis.
  • Take existing content to the next level.
  • Technical SEO recommendations.


  • Expensive for only occasional use.

If you’re ready to take your content to the next level, Surfer SEO offers incredible capabilities through AI-guided optimization and expansions. The cost is well worth it for serious content teams and agencies.


Frase emerges as an exceptionally efficient AI writing assistant, designed to enhance content quality swiftly. Notable clients like Coursera, Career Karma, and Talk Space testify to its effectiveness. The primary function of Frase is its ability to transform a single keyword into a high-quality draft in record time. By simply inputting a target keyword, Frase takes over, conducting a thorough analysis to generate the content.

What’s remarkable about Frase is its integration of keyword grouping and semantics, which occurs seamlessly as the AI software crafts the brief. Known as the fastest AI writing assistant for topic clusters, Frase boasts the capability to produce full-length, optimized content briefs in just 6 seconds. For those seeking a comprehensive tool that significantly reduces content workflow time, Frase is undoubtedly worth exploring.


Frase offers affordable monthly plans for individuals up to teams:

PlanContent Briefs/MoPrice/Mo


  • Blazing fast content creation.
  • Cost-effective entry pricing.


  • Keyword and topic clusters are produced at the same time as the content brief.

Choosing the Best Keyword Grouping Tool: Tailored Recommendations

Selecting the Ideal Tool Based on Your Specific Needs

The quest for the best keyword grouping tool is highly dependent on your individual use case. What suits a hobbyist blogger might not align with the needs of an in-house SEO managing a larger team. It’s crucial to assess your specific requirements and prioritize features accordingly. Here’s a breakdown of my top picks tailored to different user profiles:

For Solo Founders/Bloggers: As a blogger myself, my go-to combination would be the free keyword cluster tool from Zenbrief, paired with a solo plan from This combo allows for efficient keyword clustering, setting the stage for content prioritization. With the basic plan from Frase, executing and publishing up to four high-quality pieces of content monthly becomes manageable. And, should the need for more content briefs arise, upgrading the plan is a straightforward option.

For Agencies: Cluster AI is the standout choice for agencies, especially considering the Agency plan includes a generous allotment of 50,000 keywords. This tool is ideal if your main objective is to generate keyword clusters for client websites. Its combination of high capability and reasonable pricing for the access provided makes it an excellent investment for agency settings.

For Enterprises: The choice for enterprises can be more nuanced, varying significantly based on the scale of the enterprise’s online presence. For larger sites with up to 2,500 keywords, SE Ranking offers a perfect balance of capability and cost-effectiveness. However, for enterprises needing to track and group more than 2,500 keywords, Contadu emerges as the preferable solution, catering to more extensive keyword management needs.

These recommendations are based on balancing functionality, affordability, and ease of use, tailored to meet the diverse requirements of different types of users in the keyword clustering domain.

Frequently Asked Questions on Keyword Grouping

1. Are Free Keyword Grouping Tools Effective?

The effectiveness of free keyword grouping tools varies based on your specific needs.

For instance, I’ve found the free Zenbrief keyword cluster tool to be quite useful, though it is relatively basic.

In comparison to a more advanced tool like Surfer SEO, which analyzes your content and suggests keywords based on Google’s NLP and top-ranking articles, it falls short.

Sometimes, opting for an SEO tool with built-in keyword clustering capabilities might be more beneficial.

2. How Can I Quickly Build a Topic Cluster?

Building a topic cluster can be streamlined by following these steps, as outlined by Semrush:

  • Step 1: Identify the primary keyword or topic you aim to rank for.
  • Step 2: Conduct keyword research to uncover all relevant topics.
  • Step 3: Utilize a keyword grouping tool to define your clusters.
  • Step 4: Develop a structured content plan, placing pillar content at the core.
  • Step 5: Begin the content creation process.
  • Step 6: Implement internal linking strategies, particularly focusing on the pillar page.

3. Does Keyword Clustering Enhance SEO?

Yes, keyword clustering can significantly boost your SEO efforts. According to Rock Content, keyword grouping enables the creation of more comprehensive content, better aligned with user intent.

This thorough approach often results in your content ranking for a broader range of keywords, thereby increasing traffic.

While it’s important to remember that numerous other ranking factors play a role, incorporating keyword clustering into your strategy can be a valuable asset.


No matter your specific needs, this guide covered the top keyword clustering tools available in 2024. All provide immense value to take your SEO content strategy to the next level using intelligent clustering.

Hope this guide helped explain the importance of clustering along with key features and use cases of the top nine tools on the market! Let me know if you have any other questions.

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