Decopy AI Review: Is It Really Reliable?

Let’s be honest: almost everyone leans on AI to help with writing. It’s fast, it’s convenient, and it can be just the lifeline you need when you’ve been staring at a blank page for hours on end.  

But if you regularly use AI to draft or refine your work, it’s easy to fall into the typical “AI traps”, like over-polished phrasing that sounds robotic, or repetitive sentence structures that just feel a bit off. 

Even the best writers can develop blind spots, which is why having access to a reliable AI detector is essential. 

Decopy AI is just one of dozens of tools marketed as a tool that can help.

But can Decopy’s AI Detector truly spot all AI content?

Or is it just another tool that catches the obvious stuff, but misses the subtle signs that more advanced AI detectors can detect? 

Let’s find out! 

Read on for our honest review of Decopy AI and how it compares to leading AI detection platforms like Undetectable AI, GPTZero, ZeroGPT, and Grammarly. 

TL: DR – Decopy AI is a free AI detection and rewriting tool that’s simple to use, but it’s not the most accurate tool compared to leading AI detectors (like Undetectable AI).

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Key Takeaways

• Decopy AI offers free AI detection and rewriting tools but lacks accuracy in identifying AI-generated content.

• In tests, Decopy AI detected only 20% AI in fully machine-written text—far less than Undetectable AI’s 99% accuracy.

• While it’s simple and student-friendly, Decopy struggles with AI-edited or paraphrased text.

• Undetectable AI remains the more reliable option for precise AI detection and advanced humanization.

• Ideal for professionals, Undetectable AI ensures content passes AI detection while maintaining human tone and quality.

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What Is Decopy AI?

Decopy AI is an online AI detection and content rewriting platform that claims to help users detect and humanize AI content. 

The platform is primarily marketed to writers and students, aiming to help them: 

1. Write faster
2. Improve the quality of their writing
3. Preserve academic integrity

In short, Decopy AI positions itself as a “one-stop shop” for anyone who wants to use AI to write more efficiently and make sure their writing can pass as 100% human. 

Key Features of Decopy AI

Like most AI writing tools, Decopy AI combines a mix of detection, rewriting, and editing functions.

Here are the key features worth noting:

• AI Detector: Scans text to identify how likely it was written or influenced by AI.  
• AI Humanizer: Rewrites AI-generated text to make it sound more natural. 
• AI Summarizer: Condenses long passages of text into clear, concise summaries.

There are also tools specifically designed for students, including: 

• Ask AI: Chatbot for asking questions and generating quick responses. 
• AI Math Solver: Solves equations and provides step-by-step explanations. 
• AI Homework: Offers basic homework help for math problems and essays. 
• AI Flashcard: Quickly convert notes or images into flashcards for studying. 

Decopy AI Accuracy Test

So how does Decopy perform in the real world? We wanted to find out, so we put its AI Detector to the test. 

Methodology and Full Results

To test the quality of Decopy’s AI Detector, we used two short writing samples for this test:

1. A 100% AI-generated paragraph written using ChatGPT. 

William Shakespeare, often regarded as the greatest writer in the English language, was an English playwright, poet, and actor who lived during the late 16th and early 17th centuries. His works, including iconic plays such as Hamlet, Macbeth, Romeo and Juliet, and Othello, have had a profound and lasting influence on literature and theatre around the world. Shakespeare’s writing is celebrated for its rich language, deep understanding of human nature, and exploration of timeless themes such as love, power, ambition, and fate. Through his masterful use of verse, dramatic structure, and character development, he transformed the art of storytelling and helped shape modern English. Even more than 400 years after his death, Shakespeare’s works continue to be studied, performed, and reinterpreted, proving his enduring relevance and universal appeal.

2. A lightly edited AI version of that paragraph, to simulate what most users might publish after basic proofreading. 

William Shakespeare was an English playwright, poet, and actor whose work has shaped the way we think about stories and language. Shakespeare was born in the 16th century, and he’s best known for writing plays like Romeo and Juliet, Hamlet, and Macbeth, which are still performed (and loved) today. 

What makes Shakespeare so remarkable is how deeply he understood people, including their hopes, fears, and flaws. His characters feel real and timeless. And his words still capture emotions we all experience, even today. 

Beyond his talent for storytelling, Shakespeare also had a unique gift for language. He invented phrases, sayings, and expressions that people still say today. And more than four centuries later, his plays continue to connect with audiences around the world, showing that great art never really grows old.

Each sample was run through three AI detectors:

• Undetectable AI
• ZeroGPT
• Grammarly 

Here are the results: 

Decopy AI Detector vs Undetectable AI vs ZeroGPT
	Decopy AI	Undetectable AI	ZeroGPT
Sample 1: 100% AI	20% AI	99% AI	100% AI
Sample 2: Slightly Edited AI	67% AI	82% AI	100% AI

The results here show that Decopy’s AI Detector was significantly less sensitive to AI-generated text compared to the other tools tested. 

While Undetectable AI and ZeroGPT consistently flagged both samples as mostly or entirely AI-written, Decopy’s tool detected only 20% AI in the fully machine-generated sample and 67% AI in the lightly edited version.

Overall, this test indicates that Decopy’s detector is considerably more lenient than other leading AI detection tools.

While this leniency is helpful for preventing false positives, it also means the tool may struggle to accurately and consistently identify AI-generated or AI-assisted text, especially when minimal human editing is involved.

It’s also worth noting how ZeroGPT could not pick up on the light human edits in the second sample, labeling it as 100% AI, while Undetectable AI could detect the human involvement.

False-positives like this are frustrating for writers who know their content has been edited by a human, but the AI detector can’t pick up on the subtle differences.

To avoid this issue, we recommend always using Undetectable AI’s own AI Detector and Humanizer tool, which is recognized as one of the most accurate AI detectors out there.

This is the best way to make sure signs of AI are consistently detected without any false positives. 

Pricing and Plans

Currently, Decopy AI’s full suite of tools is completely free to use, and you don’t even have to create an account.

However, this also means its capabilities are somewhat limited compared to premium platforms. 

Decopy AI Advantages and Disadvantages

Like any free AI tool, Decopy AI comes with its strengths and weaknesses.

Here’s a quick breakdown: 

Decopy AI: Advantages and Disadvantages
Advantages	Disadvantages
Completely free to use, no login required.  Simple interface and minimal design.  Basic rewriting capabilities.  Additional tools for students to help with assignments beyond writing.	Limited accuracy, struggles with paraphrased and AI-edited text.  No real editing depth, the “humanized” output often feels generic or overly simplified.  No advanced features for tone adjustment or deeper linguistic analysis.

Decopy AI vs Undetectable AI

Both Decopy AI and Undetectable AI can help detect and refine AI-generated content.

But deep down, both platforms are built for very different goals. 

Decopy AI focuses on simplicity for casual users. It’s convenient if you just need to scan a short text or reword a few sentences to sound more natural.

However, Decopy AI’s humanizer and detection accuracy are limited, making it less reliable for professional, academic, or SEO-driven writing. 

Undetectable AI, on the other hand, is a lot more precise. It not only identifies AI-generated content with industry-leading accuracy (earning a spot in ZDNet’s list of top five AI detectors), but it also offers advanced rewriting tools that make your writing sound genuinely human. 

Here’s a closer look at how the two compare: 

Decopy AI and Undetectable AI Compared
	Decopy AI	Undetectable AI
Primary Purpose	Basic AI detection and text rewriting for students.	Advanced AI detection and humanization.
Ideal for…	Students and casual writers.	Marketers, content creators, academics, and businesses.
AI Detection Accuracy	Moderate	Industry-leading accuracy across 100% AI, AI-edited, and mixed content.
Free Access	Yes	Yes, premium tools available.
Additional Tools	AI Math Solver, AI Homework, AI Flashcard, and more.	Ai Humanizer, Stealth Writer, Paraphrase, SEO Writer, Resume Generator, and more.

Can Decopy AI Detect AI-Edited or Paraphrased Text?

Based on our experiment, Decopy AI could detect some AI-edited and paraphrased text.

However, it failed at detecting 100% AI-written text, which raises doubts about the overall accuracy and reliability of the tool. 

If your goal is to make sure your writing can actually pass AI detection, Undetectable AI’s tools are a far more dependable choice.

For example, the AI Paraphraser tool can refine sections of text to remove detectable AI phrasing, while the AI Stealth Writer can perform deeper, structural rewrites that eliminate AI patterns entirely. 

And before you hit submit, you can always trust Undetectable’s AI Checker to accurately verify whether or not your writing will pass AI detection.

Start refining your text with our AI Detector and Humanizer below!

Frequently Asked Questions

The Final Verdict 

So, what’s the final verdict on Decopy AI? Is it worth at least trying? 

In all honesty, not really. 

While Decopy AI offers a free and simple way to check or “humanize” your writing, its accuracy just doesn’t hold up compared to more advanced AI detectors.

The tool struggled to detect AI-generated content in our experience, and it even misclassified 100% AI-written text as 42% human. 

This makes Decopy AI an unreliable tool for anyone who needs dependable AI detection, especially students, professionals, or content creators who can’t risk false positives.

For a more accurate and reliable solution, try Undetectable AI — the trusted tool for detecting and humanizing AI content with precision and confidence.