15 Best Free SEO Writing Assistant Software 2024

One of the easiest ways of gaining website traffic is by publishing articles that are optimized for search engines.

Interestingly, big companies spend huge amounts to hire professional writers for SEO copies. However, you can use automated tools to write search engines optimized articles without spending a dime.

By using SEO writing assistant tools, you can do keyword research, get internal links suggestions, check for plagiarism, improve readability, and optimize your articles for search engine visibility.

Does it sound interesting? Would you like to know what tools you can use and how they can help you? Stay with me. In this post, I will show the best free SEO writing assistant software.

Best Free SEO Writing Assistant Software

1. Yoast SEO

Yoast is the number 1 SEO plugin for WordPress users. It’s among the best that you can install if your website is hosted on WordPress. Yoast will help you optimize your writing for both Google and Bing.

This free SEO writing assistant has a variety of features. You can analyze your writing for specific keywords that you want to rank for.

After entering the keyword, Yoast will scan your content to check if it’s well distributed. If it’s not, you’ll get instructions on how to improve keyword placement in your work.

Another important Yoast feature is internal and external linking. Your content will rank higher on search engines if it contains the right links. Yoast will recommend the right links for you to add.

Finally, Yoast scans your writing for readability. This ensures you avoid very long sentences, use the right subheadings, and ‘connecting’ words.

In addition to the free version, Yoast has a premium version. The main advantage of the premium is that you can add more main and related keywords.

Yoast Premium costs only $89 per site. It’s a one-time purchase fee. The premium comes with free updates and support for a year.

2. SEMRush SEO Writing Assistant

This SEO Writing Assistant is one of the free tools from SEMRush. The tool checks if your writing follows the best SEO practices.

With SEMRush SEO Writing Assistant, you can check your writing in real-time. It supports Google Docs and WordPress. Hence, you can install its add-on or plugin respectively.

This tool checks four major SEO criteria including keyword optimization (SEO), readability, originality, and tone of voice. It works relatively fast in delivering results.

To optimize your writing for search engines, you can set multiple target keywords. SEMRush will check that they are well-distributed and also recommend related keywords to you.

Plagiarism is against SEO protocols. This is why the tool checks for originality with its plagiarism checker. It detects all unoriginal texts and sentences.

For readability, the SEMRush tool checks the language of your text – words and sentences. You can set a word count target and the tool will ensure you meet it.

You can install the SEMRush Writing Assistant from the Google Workspace Marketplace for Google Docs. It’s as easy as clicking on the Install button.

For WordPress sites, it’s available in the plugin directory. You can also use the SEMRush Writing Assistant on the SEMRush website.

3. Link-Assistant Content Editor

Link-Assistant provides an all-in-one SEO PowerSuite. The pack contains four free SEO tools among which is the Website Auditor. One of the features of the Website Auditor is the SEO Editor Tool.

The Link-Assistant Content Editor is a great SEO writing assistant tool. You can create, edit, and optimize your works directly with the tool. It works for keyword research too.

After entering all your target keywords, you’ll get additional keywords from the recommended keywords section. You get a quick rundown of the SEO of your writing with the Optimization Rate Checker.

Furthermore, the tool lets you analyze your competitors. You can spy on your ranking competitor content to see how they place their keywords.

An interesting feature of this free SEO writing assistant tool is the word cloud. The word cloud displays the most used words in your writing. This ensures you don’t overuse keywords or prioritize a non-target keyword.

The Link-Assistant Content Editor tool is unique as it’s customizable. You don’t have to always work with the default SEO recommendations. You can create custom SEO recommendations for your writing.

4. Ink For All

Ink For All is a noteworthy mention among our list of the best free SEO writing assistant software. It’ll improve your writing by helping you write, rewrite, simplify, and expand. It has a host of several other features too.

With the Ink Editor, you don’t have to worry about search engine algorithms. The editor is transparent; it lets you know if your content will rank or not.

As you write, Ink scans the internet for top-ranking content. It then rates your writing against the other content to calculate your success rate. You’ll get a list of tasks to improve your SEO success rate if it’s poor.

Some of the factors that Ink checks for include headlines, readability, spelling & grammar, passive & active voice, use of keywords, and unique hyperlinks, among others.

Notably, there’s an Opportunity Detector that uncovers possible writing advantages. All of Ink’s SEO features are free but there are some pro writing features. The pro version starts at $35 per month.

You can download the Ink software from the official website. The software has a minimalist interface which makes it easy to use. You can also install the plugin if your site is on WordPress.

5. SEO Review Tools

SEO Review Tools features a free Content Analysis tool and SEO Content Assistant/Editor. The Content Assistant is the ideal writing assistant but the Content Analysis tool is just as useful.

You can write your web content directly in the Content Editor. On the right side is a tab for SEO optimization. You get options to add focus keywords, related keywords, and synonyms.

SEO Review Tools also features a keyword research tool. Hence, you may not need a third-party tool to generate keywords. Also, you can easily transfer your keywords to the Content Assistant.

Your keywords are checked for placement in your headings, body text, image alt tag, and image name. The Content Assistant also analyses your word count, content length, links, and meta description.

From the second tab, you’ll get a list of tips to optimize your content following the analysis. The tool displays an Optimization Grade that gives you a quick idea of the SEO health of your writing.

Notably, this free SEO writing assistant software helps you avoid keyword stuffing by issuing warnings. SEO Review Tools support exporting. This makes it easy to transfer your optimized work to your website publishing platform.

6. Grammarly

Grammarly is currently the most used writing assistant on the internet. The tool is not exclusive to SEO but writing in general. SEO requires proper grammar and spelling which Grammarly can help you with.

Generally, using Grammarly will improve your content readability score. Grammarly is super easy to use. You simply paste your content and let it scan.

The tool will list out all the errors in your writing. Not just grammar and spelling errors but also punctuation errors and misused words. You can set your tone, audience, and more options to influence the analysis.

Grammarly works almost everywhere. You can use it online via the official website or download the software for your computer. It’s also available as a browser add-on and MS Word add-on.

If you write with your mobile device, then, you’ll appreciate Grammarly. The Grammarly keyboard for mobile devices allows you to optimize your writing on the go.

Grammar has some premium optimization features. This includes additional suggestions, a plagiarism checker, and an analytics dashboard to name a few. Premium plans start at $12 per month per annum.

Check out more Grammarly like tools here.

7. Hemingway Editor

The 7th best free SEO writing assistant on this list is the Hemingway Editor. You can use the Hemingway Editor to finetune your SEO content even if it’s not exclusive to SEO.

Hemingway Editor will improve your readability score. It ensures you use simple-to-read phrases and sentences. The corrections are highlighted in different colors making the tool easy to use.

For example, lengthy sentences with unnecessary wordings are highlighted in yellow. Dense and complicated sentences are highlighted in red and weakening phrases in blue.

Furthermore, passive voice is highlighted in green and long words with shorter alternatives in purple. At the right tab, you get an overall readability grade for your content.

The Editor features two different modes – Write and Edit. This is to ensure that you’re not distracted by the color corrections. After writing you can switch to Edit mode and begin optimizing your work.

The Hemingway Editor is available for free online. Just visit the website and start writing. You have to purchase the writing assistant if you want to install the app on a desktop or mobile device.

It’s a solid tool than most other similar tools in this space.

8. LanguageTool

Not everyone writes in English. Non-English website content also requires SEO to rank. The LanguageTool is one of the best tools to optimize such writings.

It’s a multilingual writing assistant that supports English, German, French, Spanish, and Portuguese. These are the major languages of the world.

Other free SEO writing assistant software on this list might support other languages too. However, the LanguageTool is different as multilingual writing is its primary target.

You just need to paste your content into the editor or write directly in it. The software automatically checks your content for errors. You get word suggestions and an overall quality score for your writing.

An advantage of using LanguageTool is that you can use it almost anywhere. It features an add-on for Chrome, Firefox, Safari, and Edge browsers. There are also add-ons for MS Word, Google Docs, and LibreOffice.

LanguageTool features a premium plan like a few other software on this list. Notably, the premium plan increases the number of characters you can check at a time. It begins at $2.46 for individual users.

9. Rank Math

Rank Math is another popular SEO plugin for WordPress. The software uses widely accepted best SEO practices to analyze and optimize your writing.

Many users choose Rank Math over other plugins like Yoast because it has more free features. Rank Math checks both basic and advanced SEO.

At the basic level, you can add focus and sub keywords. Rank Math checks where these keywords are featured in your writing. Advanced SEO checks your keyword in image alt attributes, subheadings, keyword density, and links to name a few.

You’ll receive tips to improve if your writing performance is poor. A unique Rank Math feature is the Pillar Content. This means the content should be relevant in years to come and it attracts extra SEO recommendations.

As you write and optimize, Rank Math gives you an overall optimization score over 100. You get a green score if your overall score is above 80.

Rank Math also analyses your content length. Short content hardly ranks on search engines. The tool will tell you whether you need to write more or not.

You can opt for the Rank Math premium for extra features. Pricing begins at $59 per year.

10. Article Optimizer

Article Optimizer is a free and open source SEO writing assistant. It may not be as intuitive as others but it’s one of the best. To use Article Optimizer, you just need to visit the website and paste your content.

The software doesn’t require registration but you can submit your email if you want. The tool generates a report after optimizing your work. You can then follow the instructions to improve. You can edit directly on the platform.

The tool fits your content in a category and lists out all related keywords you can add. You get to know the most relevant keywords from the sentimental analysis section.

The sentiment analysis can help you improve the structure of your keywords. Another important feature is the phrase density feature. It reveals the most frequent words in your content and helps you avoid keyword stuffing.

Finally, the tool brings up copyright-free images that fit the content that you can use. The importance of images in SEO cannot be overemphasized which makes this a valuable feature.

Article Optimizer works best on desktop devices.

11. Squirrly SEO

Squirrly SEO is an SEO software suite. You can use it on WordPress by installing the plugin. The software works for keyword research, content optimization, and also rank tracking.

The software is easy to use and works in real-time. It’s AI-powered software and very efficient. As you write, it analyses your content and gives you suggestions on how to improve it for search engines. It also checks for readability.

This free SEO writing assistant features a keyword research tool. You can easily save and add keywords to your writing. Notably, you can use it to discover keywords in more than 140 languages.

With Squirrly SEO, you get a detailed SEO audit with performance scores after the tool analyses your content. Squirrly SEO checks your content for over 113 ranking factors.

It comes with default SEO analysis settings but you can adjust them to suit your writing pattern. In addition, you can import SEO settings from other popular SEO plugins like Yoast and Rank Math.

You can access more SEO features with the Squirrly SEO Pro. Although the WordPress plugin is free, you have the option to upgrade. The pro plan starts at $20.99 for your first month.

12. Blogely

Here we have a fully-fledged writing tool. The software was developed for content creators. It works for content research, writing, optimization, collaboration, and publishing.

The Blogely content asset manager will help improve SEO in your writing. It focuses on quality and ensures that you create original content.

The software optimizes your content for search engines via a 3-step process. This includes the Metadata Details, Focus Keywords, and general SEO Review.

Without adding focus keywords, the software generates ideal focus keywords after scanning your text. The SEO ranking rate reveals the possibility of ranking for your focus keyword. You also get CPC, CMP, and trend info.

The third step provides a simple yet detailed SEO analysis. This is where you’ll find fixes to apply and improve your writing.

It borrows SEO recommendations from popular software like Yoast and Rank Math. The advantage is that you can create all your content in Blogely.

Collaboration support also makes Blogely a unique SEO writing assistant. You can seamlessly share and receive works from your other writers if they use the platform too.

The Blogely Basic plan is free and you can do a lot with it. The software features pro plans starting at $29 per month as well.

13. WordStream

WordStream is a popular tool for online advertising. However, the tool can help you improve your writing for SEO. This is by providing you with the right keywords.

Getting the right keywords is essential to ensuring that your articles rank well on search engines. Many free SEO writing assistants on this list feature keyword research tools. However, the WordStream free keyword tool is unique.

This tool works for generating keywords, analyzing keywords, and finding negative keywords. It’s fast and easy to use. This free SEO writing assistant will help a lot if you are confused about what to write about.

You can get keyword ideas by analyzing a phrase or website. It gives you a long list of keywords. You get the estimated CPC for each one among other details.

There are filters so you can easily get the keywords you’re interested in. You can also generate keywords according to specific locations.

WordStream is one of the best SEO writing assistants to use as it is supported by Google. Every keyword and trend you get are from searches by Google users. The tool also works for Bing.

14. Copywritely

Copywritely is described as SEO content software for professionals. Its purpose is to improve content optimization. The software is mainly premium but there are a few free tools that can improve your writing.

This includes the Keyword Density Checker, Grammar Checker, Readability Checker, and the Duplicate Content Checker.

The disadvantage with Copywritely is that these tools aren’t integrated as one. They are all available as separate tools. Nevertheless, they provide impressive results.

To use the tools, you just have to paste your text into the box. The two main important free Copywritely tools for SEO are the Keyword Density Checker and the Readability Checker.

The Keyword Density Checker prevents keyword stuffing. You can edit the text after checking directly in Copywritely. The Readability Checker ensures that your writing is easy to read.

Furthermore, you can take advantage of the Duplicate Content Checker to be sure your work is free from plagiarism.

As mentioned earlier, Copywritely is mainly premium. If you’d like to also try the premium tools, you can get your first month free with an annual payment.

15. All In One SEO

At number 15, we have All In One SEO, AIOSEO. This is a popular WordPress SEO optimization tool with more than two million users. AIOSEO is a freemium tool.

This SEO writing assistant is renowned for its TruSEO Score. The TruSEO score tells you how friendly your writing is to search engines.

It comes with in-depth SEO optimization analysis and actionable tips to improve. Like most other tools, you can add focus keywords and check their placement.

Notably, you can set posts as pillar content. AIOSEO also features a readability analyzer. This provides further insights on how you can improve your SEO.

To upgrade from the free AIOSEO plan, you have four different subscription plans to choose from. The most affordable is the Basic Plan at $49.50 per year. The highest is the Elite Plan at $299.50 per year.

Bottom Line

The software listed above are free to use, although some have premium features. However, you can decide whether to pay or not.

Nevertheless, by using these 15 best free SEO writing assistant software, you can improve the quality of your content. This results in higher ranking, higher traffic, and higher conversions.