Undetectable.AI Detector Review

Undetectable.AI is a versatile tool for writers, bloggers, and creators. It uses advanced algorithms to detect AI and humanize content effortlessly.

By: Joanna Penn, Published on: 2024-01-03, Last Updated: 09-01-2024

Reviewed by: Steven Pinker

Table of Contents

Undetectable.AI is a super-smart website that can detect AI content easily. This website is perfect for writers, bloggers, researchers, or content creators. Undetectable.AI's tool can find AI plagiarism and use it for humanizing text with just a few clicks. 

In this article, I’m going to review this AI detector. We’ll find out how it works for checking AI and how accurately it humanizes that content. Before I start reviewing, let’s check the reviewing process.

Process of Reviewing 

I thoroughly tested Undetectable.AI to see how well it could tell whether the content was written by a human or generated by AI:

Step 1: Initial Evaluation

I began the review process by comparing human-written and AI-generated content to see if this AI checker could tell the difference.

Step 2: Precision and Reliability Test

In this step, I compared the accuracy of this tool to that of a human-written blog and an AI-generated piece. 

Step 3: Experimenting with Strategies

Finally, I tried various tricks to see if this AI detector could show AI-generated content as human-written. 

Checking How Well Undetectable.AI Works

As you enter your content, this tool provides you with two options: 'Check for AI' or 'Humanize.' Let’s see what the purpose of these two features is.

1. Check For AI

This option allows the user to find the AI in the content. You will find three different colors:

  • The red color will highlight if the content is 0% human
  • The orange color will highlight if the content is 50% human
  • The green color will highlight if the content is 100% human

Now, it’s time for us to check the accuracy of Undetectable.AI. I simply asked ChatGPT to generate a paragraph on social media.

ChatGPT instantly provided me with a paragraph of 74 words on this topic. 

I opened the tool and pasted my generated paragraph in the text box to check for AI plagiarism. After clicking on “Check for AI," this tool displays the result instantly, showing that the content was AI-generated.

2. Humanize the AI Text

Now we can play with the second option this tool provides, “Humanize the AI text.” I’ll simply click on this button to see if this tool can add a human touch to this AI-generated content.

As I clicked on the button, the tool instantly “humanized the content.” 

Now, let’s check whether this tool can detect its AI percentage again.

I entered the same content (I humanized it earlier).

On clicking “check for AI,” this tool didn’t find AI similarity within the content.

Now that I’ve tested this tool with AI content, it’s time for me to check what it does with human-written content.

So, I wrote a paragraph on the same topic and fed it to the tool. Here’s what it showed:

 This AI checker shows that the content appeared to be human-written. 

On checking its accuracy, I found that it detects AI in the content and also humanizes any AI-written content efficiently.

Key Features 

Undetectable.AI uses advanced algorithms like machine learning, dynamic programming, and quantum algorithms to differentiate between human-written and AI-generated content. Let's take a look at some of the cool features. 

  • It can detect AI and also humanize that content accurately.
  • It can analyze up to 10,000 characters in a single go.
  • It accurately identifies text from GPT-3, GPT-4, Bard, Claude, and other AI writing tools.

Price Plan

Undetectable.AI comes with a free plan that covers up to 15,000 characters of text. But if you're a regular user who wants to check more text, there are three paid plans:

  1. Monthly Plan: For $9.99 a month, this plan gives 10,000 words of text per month.
  2. Yearly Plan: For $5 a month, this plan gives 10,000 words of text each month. 
  3. For Business Plan: There is a manual setting of words, and on that basis, the pricing will be set accordingly.

Pros and Cons of Undetectable.AI

Let us look at the pros and cons. 


  • It combines the eight best free AI detectors in one place, providing the results you need.
  • Provide AI detection and rewriting of text perfectly.
  • It provides a user-friendly interface.
  • There's a free version that anyone can use. 


  • It lacks a feature that highlights the AI-detected text.
  • There is a need to edit the output.
  • It doesn’t support other languages except English.

Best For

Undetectable.AI is best for marketing professionals, bloggers, writers, students, researchers, and journalists. It can easily detect the AI level of the text and can also humanize it to make your content AI detection-free.


Here are some top alternative AI detectors to Undetectable.AI that you can use:

  • GPTZero
  • Scribbr 
  • Zerogpt.com 
  • Contentdetector.ai 
  • Detecting-ai.com 
  • Duplichecker


Undetectable.ai is a handy tool that checks if your text is human-written or AI-generated. It combines eight great detectors in one spot, providing quick and accurate results. Perfect for writers, researchers, and recruiters, it helps ensure authenticity. While it may need a bit of editing, its user-friendly design and free version make it a go-to for various uses.