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What are the best SEO tools for semantic analysis?

Semji > Content Marketing > What are the best SEO tools for semantic analysis?

What is analysis or semantic searching?

Definition of semantics

Before getting started on semantics applied to search engines, lets first define semantics. 

Semantics is defined as a branch of linguistics that studies the signified, what we talk about, what we want to say. Its symmetrical branch, syntax, deals with the signifier, its form, its language, its writing, its grammar…”. The word semantics is derived from the Greek σημαντικός (sêmantikos), signifiedformed from σημαίνω (sêmainô), to signify, to indicateor σῆμα (sêma), sign, mark. It was introduced at the end of the 19th century by French linguist Michel Bréal, author of the first treatise on semantics.

From the Greek SEMA (meaning), the term semanticsrefers to the study of meaning, the meaning of a word. Applied to search engines and SEO, semanticsessentially refers to the study of words and their meaning. Since its beginning, Google tries to understand user intentions. With the advent of AI First and Voice Search, an important part of Googles algorithm is based on semantic research and on machine learning algorithms.

Semantic research aims to improve the understanding of search by analyzing the users intention to provide more relevant results. Some platforms such as Semj are designed to help marketers, SEO experts and editors to quickly understand the search intent behind a query. In a few clicks, its possible to know which topic to cover in a content, which words to use, which answers to provide to online users.


Why carry out a semantic analysis in SEO?

There are several reasons why you should do an SEO semantic analysis for your website. First, semantic analysis allows you to know user intentions on keywords or phrases/queries entered in the search engine.

Second, semantic analysis allows you to answer to different types of queries:

  • navigational queries, to access a website or a page (for example, Facebook, town hall, Paris 6th district, semantics)
  • informational queries: the user is looking for specific information (for example: how to carry out a semantic analysis on my websiteor how to learn Ancient Greek)
  • transactional queries with a purchase intention (buy a dictionary)
  • local queries which are location-based queries (Eat Greek food in Paris)
  • you can also extend this to visual / video / news / brand queries or multiple intent queries.

To know if your content targets the right keywords and truly answers the questions users are asking, you can test Semji for free.

Googles algorithms constantly analyse web pages to rankthem according to their relevance and help users.

For the SEO of your website, it is essential to take into account Googles criteria in terms of semantics and to apply them. An important element for your websites offsite SEO is to precisely identify the most searched keywords. Google prefers content that contains this list of words, as it answers user queries.

In fact, the search engine retrieves the 10 first results on the SERP (Search Engine Result Pages), analyses its content and highlights the most recurrent words, to identify the different interests of a reader on a topic.


How can you do a semantic analysis?

To do a full semantic analysis, there are a couple of tools designed for semantic analysis as part of an SEO strategy. To ensure your content is good enough for Google, you must identify these keywords and add them to your content in a relevant way.

Beyond simple keyword generators, we now use semantic analysis, linguistic analysis and lexical analysis software.

We usually use the termstext miningand text analyticsto define the analytical technology for text data.

The purpose of these tools is to identify similar semantic phrases you could use to improve the relevance of your content.

Following up on our article onSemantic analysis: the ultimate weapon for boosting your SEO, it was important for us to share the tools used by SEO agencies to help you carry out your audit or semantic analysis.


What are the best tools to do a semantic analysis?

Semantic analysis tools can be used to identify usersintentions, keywords or phrases. They reveal the needs of online users on a given topic and generate a list of words that they expect to find in the text to answer their question.

Here is a list of the top SEO tools that can help you get started with semantic analyses. Free tools like Alize can be interesting but are limited. Premium tools will give you more insights. The free trial version of Semji will help you get started and optimize your first contents. With our recommendations, you can target the right search intent to become THE most useful and relevant answer to your audience.



Semji is a premium semantic analysis platform to optimize the performance and visibility of your content on search results pages.

Created by SEO and content marketing experts, Semji supports companies in their content marketing strategy. Semji was designed to attract, engage and convert leads through content.This content marketing platform makes it easy to produce content that converts while tracking your KPIs in one place.

What are Semji’s features?

Powered by artificial intelligence, Semjiidentifies the topics that need to be covered in content around a given keyword to meet user expectations.


  • Guarantees the production of effective content that meets your audiences search intents.
  • Suggests the most strategic keywords for your website
  • Builds a consistent semantic architecture, with efficient SEO linking for your website to become the most relevant on a topic
  • Track the impact of your content, traffic, conversion rate and turnover
  • Get help from an SEO/Content marketing expert to reach your SEO and Content goals faster
  • Content optimization available in 8 languages across 128 countries


  • Does not check the structure and architecture of a semantic cluster
  • Do you want to create useful, visible, profitable and efficient content? Semji helps you become THE leading brand in your industry and to rank in top positions.


Alyze is a free semantic analysis tool, created by a French company in 2008. This SAAS software is a great way to perform semantic analysis for free. Its easy to use, simply enter a URL in the main search bar to get data on the word density of a webpage.


Hows the data displayed?

Alyze analyses the content of the page entered and highlights the keywords based on to two criteria:

  • The gross density: the number of times a word appears on the page.
    Example: For the phrasesemantic analysis tool, its gross density will be 0.56% in this text.
  • The weighted density: refers to the number of times the keyword appears on the page by also taking into account its position (Title, H1, paragraph etc.) and calculates its density based on this criteria.

During a search, the software will by default sort the results by weighting, but you can also click on “Associations” to group keywords based on their frequency and similarity.



  • Software speed
  • Suggestions for improvement
  • Free semantic analysis tool


  • The data is sometimes complex to read
  • The website is a bit outdated and hard to use

Alyze is a basic tool, used for weighted density data, but remains limited for more advanced semantic analyses.



YourTextGuru is a search-intent based tool that provides writing guides. For content marketing, it is a very useful tool to write content while saving time for writers.
This software allows you to create a list of related keywords based on the keywords you enter in the search bar.

They have two offers : 

  • The Premium guide creates a precise and comprehensive list of top keywords. You will find “top terms” divided into 3 levels, from the most used to those that are often used but with less importance, as well as entities such as brand names and personal names related to your word.
  • The one-shot guide offers a drafting plan with some keywords from the Premium guide. There is a version created and organized by YourTextGuru operators. This guide will help you draft briefs more quickly if youre not familiar with the topic.

YourTextGuru simulates Google’s text treatment relevance, retrieving texts on the same topic and identifying the most important key phrases by automating the search.


  • Writing assistance
  • Time saving


  • Not 100% reliable on the keywords found
  • Price / quality



1.FR is a semantic analysis tool that allows you to analyze the content of search engine results according to a specific search. This software enables the optimization of the lexical fields that should be used on a website, a webpage or an article.

How does 1.FR manage to extract these lexical fields?

By analyzing your pages and those of your competitors, the tool highlights the words and phrases that best meet Googles algorithm expectations.

Its quite easy to use. All you have to do is enter your keyword in the search bar on the home page and choose your search engine (Google or Bing). Then, you can either copy and paste your text or enter the URL of a page.

Once you have completed these steps, all you have to do is check your score on both the structure and content of your text.

This SAAS software highlights 5 things:

  • Score on the structure of your text (sentence length, use of different verbs, etc.)
  • Score on the content of your text
  • Topic(s) your website covers
  • Missing keywords in your content (only available in the paid version)
  • Relevant keywords that are already included in your content

Compared with other tools, 1.FR is very simple to use and also very efficient. In addition, you get an overview of the words and/or phrases on a given topic.

In the paid version, you can upload a report of your analyses and create a public link to share, available for 7 days.



  • Helps you create semantic clusters
  • Time saving
  • Allows you to export data
  • Extension available on Google Chrome and WordPress



  • Not very user-friendly interface
  • A bit expensive considering that it is possible to do the same thing by using different free tools.

SEO Quantum


SEO Quantum is a comprehensive semantic analysis tool with recommendations to optimize your websites content. As mentioned above, the most important for Google is that your content provides value for the user. SEO Quantum was created for this purpose.

From a keyword, SEO Quantum analyses the first results of the SERP and extracts the lexical fields. Two technologies are used, one is a crawler to extract the contents of webpages, and the other is the Wordprint technology.

This concept analyses the DNAof the keywords it is given and returns a list of related words that Google expects to see in your content, and splits them in three columns: Lexie , Strengthand Index .

The software also shares examples of questions discovered in the SERP content analysis: a great tool for writers lacking inspiration on a topic.

Thanks to its machine learning algorithm, SEO Quantum creates a semantic cluster by analyzing the competitors positioned on the same topic and therefore on the same keywords. This tool is based on artificial intelligence, so by knowing what your competitors are doing, you can do better than them by creating more relevant content.


  • Several subscription plans
  • Time saving
  • User-friendly interface



  • Risk of having content similar to others
  • Be careful with over-optimisation


Visibilis outil sémantique


Visibilis is a semantic analysis tool that will help you optimize your content by providing you lists of keywords and key phrases related to your topic.

Ideal for online content writing, it gives you a wide range of words related to a topic to help you rank more easily.

It also allows you to visualize the semantic cluster, to make sure your links are aligned, and to check if your website is properly structured.

This tool will extract a semantic cluster from the texts of the webpages found on the SERP according to the tf.idf model and the Salton cosine. The resulting data is displayed either as a table of co-occurrences or as a writing guide.

Visibilis also provides lexical fields to be used according to given keywords or phrases, and also analyses web pages/texts that you provide and measures their performance.

With Visiblis, sub-tools such as Visitext will track the relevance of your content and help you improve it. This analysis includes the page title and the tag or the text itself. Visitext measures the semantic performance of your web page based on a URL or text.

With Visicorp, you can generate semantic clusters either from the SERP or from URLs that you have previously entered.


  • Analyzes the work done on a semantic cluster
  • Reasonably priced, starting at 25
  • Possibility to create your own semantic cluster


  • Outdated interface
  • No free or trial version


One other tool we recommend is Textfocus.

A powerful tool to check the relevance of your content. The keywords on web pages are analyzed to highlight lexical fields that should be in the text.

By entering a URL in the search bar, Textfocus will provide you with the following data:

  • Optimization: highlights the keywords for which the page is optimized for. Great for writers who want to make sure that they have written their texts with the right phrases.
  • Suggestion: other words related to your keywords, and those used by competitors on the same topic. You can remove the words that dont match your content
  • SEO: an SEO and semantic analysis of the page content, of tags, hn, content, etc
  • Lexical: identification of the page topic based on the lexical field used
  • Keywords: analysis of all the keywords on a webpage with their different positions. You can also highlight the synonyms related to each word in this analysis.
  • Links: analysis of the internal mesh
  • Competition: shows the first 10 results of the SERP and shares on which keywords you are more efficient than your competitors, and on which you need to work more.



  • Possibility to analyze 5 URLs for free each day
  • Efficient competitor web page analysis
  • Comprehensive and easy to read analyses


  • Competition analysis is not free in the trialversion
  • Outdated interface


Today, there are many tools available to help writers create SEO-optimized content. Each tool has its own advantages, but its best to use different tools side by side for a comprehensive semantic analysis.

Semantic analysis is a fundamental part of writing web content. With semantic analysis writers can make content interesting for readers, by researching and answering their questions.

Its also thanks to semantic analysis that content can be made both more relevant and useful to Google.

Test Semji for free! Create your SEO content brief using the platforms recommendations and create content that answers user search intents.