Ahrefs AI Humanizer Review: Best AI Detector for SEO?

I put Ahrefs AI Humanizer to the test with three AI-generated text samples.

In this post, I’ll test and give an overall review of the tool, and show the results. In my reviews, I emphasize the ease of use, and will only test free tools or tools with Free trials.

Disclaimer: This post has affiliate links at no cost to you.

How to Use It

Here is how to get started. Enter their website here. Sign-up is not needed.

You can access the AI Humanizer from the drop-down menu, select “AI Writing Tools”.

You should land here, to the AI Text Humanizer. Now you can paste your text and click on Humanizer.

My Results

I asked ChatGPT to generate three different text samples on random topics; you can find them at the end of this post. Then, I humanized the texts using Humanize AI and ran a separate AI detection scan on Undetectable AI to see their AI scores after humanizing.

Let’s go to the results. First is the text number 1. The tool generates 1–5 new humanized versions for you.

And here I ran the external AI Detector scan on the new versions. They all received a 99 % likelihood of being AI-generated after humanizing.

Then I moved on to text number 2.

And here is the AI Detection scan result. Not very convincing so far.

And, the last text sample.

Slighly better than the previous ones, but still a terrible result. The humanizing barely did anything to my texts. In the free version, there are no features to tweak the output if you’re unsatisfied or want a different tone.

Pros

  • Easy and can be used even without signing up
  • Can generate multiple new variants with one generation

Cons

  • Limited words with the free trial
  • The tool barely changed anything in my texts
  • 3/3 of my test samples were flagged as AI

Pricing

Here are the pricing plans. As the prices suggest, Ahrefs has many other features in addition to AI Humanizer, mainly focusing on SEO tools.

In Summary

Ahrefs is actually an SEO toolkit designed to help improve website visibility, track performance, and analyze competitors. It’s best suited for companies or freelancers working with SEO. The AI Humanizer is not one of their flagship features.


Using the free version of the AI Humanizer for individual texts isn’t really optimal with this tool, so I wouldn’t recommend it for that purpose. It failed to humanize my texts, and they all got flagged as almost 99 % likely of being AI-generated.

To Take Home

AI humanizers try to make AI-generated text sound more “human” by tweaking phrasing structure and tone. Some even promise refunds if your text gets flagged as AI.

Honestly, these tools aren’t very reliable and don’t really add much value. If you must use content generated by ChatGPT, it’s much better to edit and polish it yourself than try to trick a detection system.

My test text samples

Here are the text samples I used. The samples are generated 100 % by ChatGPT. The samples are different topics and lengths, varying from 150 words up to 500 words.

Text sample 1 — 150 Words

Houseplants do more than decorate our homes; they quietly transform the air we breathe and the way we feel. A touch of green can soften even the most sterile apartment, making it feel alive and personal. Caring for plants teaches patience — you can’t rush a seed to sprout or a leaf to unfurl. Each morning, a small routine of watering or pruning becomes a mindful pause in the day. The scent of soil, the sight of new growth, and even the occasional wilted leaf remind us that everything thrives through attention and consistency. Beyond aesthetics, studies show that plants reduce stress and improve concentration, making them tiny guardians of both mood and productivity. In a world full of screens and noise, a simple pothos on a windowsill offers a quiet, grounding reminder of nature’s calm persistence.

Text sample 2 — 300 Words

Coffee is more than a beverage — it’s a ritual, a global language spoken in mugs and espresso cups. From the bustling cafés of Rome to the quiet drip brewers of Japan, coffee culture reflects both tradition and innovation. Each region adds its own personality: Italians linger over a quick espresso, Scandinavians sip black filter coffee, and Australians have perfected the smooth, creamy flat white.

What makes coffee special isn’t just caffeine; it’s connection. We meet friends “for coffee,” brainstorm over it, and pause mid-morning to refocus. The familiar aroma signals comfort and productivity all at once. Even in solitude, brewing coffee feels communal — millions of people perform the same act every day, in different corners of the world.

Beyond its social role, coffee is a science of flavor. Roast profiles, grind size, and water temperature determine whether a cup tastes rich and nutty or sharp and citrusy. Specialty roasters and baristas treat it as an art form, crafting drinks that highlight subtle notes like chocolate, berries, or flowers. The modern coffee movement has revived appreciation for the farmers and regions behind each bean, encouraging sustainability and fair trade.

Ultimately, coffee unites people not just through shared taste, but through shared time — a few quiet minutes in an otherwise restless day.

Text sample 3 — 500 Words

IFor centuries, humans have looked up at the night sky in wonder. Before city lights and technology, the stars were our calendar, our map, and our mythology. Even today, when satellites and telescopes have revealed much about the universe, the act of stargazing still feels deeply human — a bridge between curiosity and peace.

The beauty of the night sky lies in both its mystery and familiarity. We recognize constellations that our ancestors once named, from Orion’s Belt to the Big Dipper. These patterns remind us that across cultures and millennia, people have shared the same view above. It’s humbling to realize that the light we see from some stars began traveling toward us millions of years ago. In every small point of light lies the story of time itself.

Modern astronomy has only deepened that wonder. With even a small telescope, anyone can see Jupiter’s moons, Saturn’s rings, or the soft glow of distant galaxies. Yet, what moves us most isn’t the data or the science — it’s the feeling. Standing under a clear night sky, we sense both our insignificance and our connection to everything.

Stargazing also offers rare quiet in a busy world. When you turn off your phone and let your eyes adjust to the dark, your thoughts begin to slow. You notice the rhythm of your breathing, the coolness of the air, the vastness of space stretching above you. It’s meditation through observation.

Whether you’re in a remote field or leaning over a balcony in the city, looking at the stars is a reminder of perspective. Our daily worries — emails, deadlines, arguments — shrink beneath the cosmic scale. The stars remind us that time is immense, yet every moment we experience under them is uniquely ours.

My test text samples

Here are the text samples I used. The samples are generated 100 % by ChatGPT. The samples are different topics and lengths, varying from 150 words up to 500 words.

Text sample 1 — 150 Words

Houseplants do more than decorate our homes; they quietly transform the air we breathe and the way we feel. A touch of green can soften even the most sterile apartment, making it feel alive and personal. Caring for plants teaches patience — you can’t rush a seed to sprout or a leaf to unfurl. Each morning, a small routine of watering or pruning becomes a mindful pause in the day. The scent of soil, the sight of new growth, and even the occasional wilted leaf remind us that everything thrives through attention and consistency. Beyond aesthetics, studies show that plants reduce stress and improve concentration, making them tiny guardians of both mood and productivity. In a world full of screens and noise, a simple pothos on a windowsill offers a quiet, grounding reminder of nature’s calm persistence.

Text sample 2 — 300 Words

Coffee is more than a beverage — it’s a ritual, a global language spoken in mugs and espresso cups. From the bustling cafés of Rome to the quiet drip brewers of Japan, coffee culture reflects both tradition and innovation. Each region adds its own personality: Italians linger over a quick espresso, Scandinavians sip black filter coffee, and Australians have perfected the smooth, creamy flat white.

What makes coffee special isn’t just caffeine; it’s connection. We meet friends “for coffee,” brainstorm over it, and pause mid-morning to refocus. The familiar aroma signals comfort and productivity all at once. Even in solitude, brewing coffee feels communal — millions of people perform the same act every day, in different corners of the world.

Beyond its social role, coffee is a science of flavor. Roast profiles, grind size, and water temperature determine whether a cup tastes rich and nutty or sharp and citrusy. Specialty roasters and baristas treat it as an art form, crafting drinks that highlight subtle notes like chocolate, berries, or flowers. The modern coffee movement has revived appreciation for the farmers and regions behind each bean, encouraging sustainability and fair trade.

Ultimately, coffee unites people not just through shared taste, but through shared time — a few quiet minutes in an otherwise restless day.

Text sample 3 — 500 Words

IFor centuries, humans have looked up at the night sky in wonder. Before city lights and technology, the stars were our calendar, our map, and our mythology. Even today, when satellites and telescopes have revealed much about the universe, the act of stargazing still feels deeply human — a bridge between curiosity and peace.

The beauty of the night sky lies in both its mystery and familiarity. We recognize constellations that our ancestors once named, from Orion’s Belt to the Big Dipper. These patterns remind us that across cultures and millennia, people have shared the same view above. It’s humbling to realize that the light we see from some stars began traveling toward us millions of years ago. In every small point of light lies the story of time itself.

Modern astronomy has only deepened that wonder. With even a small telescope, anyone can see Jupiter’s moons, Saturn’s rings, or the soft glow of distant galaxies. Yet, what moves us most isn’t the data or the science — it’s the feeling. Standing under a clear night sky, we sense both our insignificance and our connection to everything.

Stargazing also offers rare quiet in a busy world. When you turn off your phone and let your eyes adjust to the dark, your thoughts begin to slow. You notice the rhythm of your breathing, the coolness of the air, the vastness of space stretching above you. It’s meditation through observation.

Whether you’re in a remote field or leaning over a balcony in the city, looking at the stars is a reminder of perspective. Our daily worries — emails, deadlines, arguments — shrink beneath the cosmic scale. The stars remind us that time is immense, yet every moment we experience under them is uniquely ours.