When it comes to AI detection, with countless reports of false positives, the bar is already on the floor — and somehow, companies keep finding ways to crawl under it.
You’d think after watching countless AI detectors fall flat on their faces, new players would be a little more… modest with their claims. But no, here comes DupliChecker, strutting onto the scene with a “100% accuracy rate” in AI detection. The only question is, can they back this claim up?
I’ve tested more AI detectors than I care to count, and if there’s one constant in this field, it’s that the bigger the claim, the faster they crumble. So, naturally, when I heard about DupliChecker’s “perfect” detector, I knew it was time to break out the big guns — Undetectable AI, the tool that’s been making AI detectors look silly since day one.
What is Undetectable AI?
Looking for something to avoid those pesky false positives?
Undetectable AI is a popular AI humanizer and bypasser whose goal is to turn something that reads like machine-generated into something more human. Their process is simple: remove common AI markers (this includes repetitions, overused AI words, and hallucinations) and add some mistakes to humanize your content.
This tool also offers a lot of output customization features such as switching from different use cases, readability levels, and paraphrasing levels. We’ve reviewed Undetectable AI a lot in the past, so make sure to check that out for a more complete overview of the product. We’ve also done reviews for their Stealth Writer and AI Human Typer features.
The bottom line is: it works really well.
Some Things To Consider With Undetectable AI
Like I said, Undetectable AI adds a few mistakes to hide AI writing from detectors. But how prominent are those mistakes?
|
The evening sun cast a warm, golden glow over the meadow as Emma stepped outside. Puffy clouds drifted lazily across the amber sky, their bottoms tinged with fiery orange. Emma inhaled the sweet floral scent carried on the gentle breeze. All around her, the blades of grass seemed to glow radiantly from within. She wandered through the knee-high field, running her fingers along the tops of the wildflowers. In the distance, a whitetail deer raised its head, silhouetted against the celestial backdrop. Emma settled cross-legged in the tall grass to bask in nature’s fleeting magic hour. She loved how the world looked gilded during that ephemeral golden hour. |
As Emma stepped outside she was greeted by the light of the evening sun bathing the meadow. Fluffy clouds lazily drifted across the sky their undersides touched with a hint of fiery orange. The gentle breeze carried a fragrance that filled Emmas senses. The blades of grass, around her seemed to glow from within creating a scene. Running her fingers over the wildflowers she strolled through the knee field taking in the beauty of nature. In the distance a whitetail deer raised its head against the backdrop of the sky. Finding a spot, in the grass Emma sat cross legged to enjoy natures magic hour when everything appeared bathed in gold. |
Let me be straight with you — neither of these essays is winning a Pulitzer anytime soon, but there’s a clear difference between the two.
The first essay, despite being AI-generated, actually reads smoother than its “humanized” counterpart. It’s got proper punctuation, flows naturally, and paints a vivid picture without trying too hard. Undetectable AI’s version, though?
Sure, the basic story is there, but it’s stumbling over missing commas, awkward phrasing (“fluffy clouds lazily drifted”? Come on…), and weird structural choices. It’s the kind of writing that makes you go back and reread sentences just to make sure you didn’t miss anything.
Funny enough, while the paraphraser was trying to make the text appear more “human-like,” it achieved the opposite effect. That’s why I highly recommend using Undetectable AI by fixing it along the way, so that it can pass as “human-written” to both AI detectors and people reading your article.
What is DupliChecker?
Since 2008, DupliChecker has been churning out over a million pages of what they call “high-quality content” for their clients. And while that number sounds impressive, what’s more interesting is their evolution from a simple plagiarism checker to a complete SEO and detection platform.
Their team is a mix of experts from different fields, all united by one goal: helping businesses grow through online services. They’ve got everything from proofreading and editing to SEO optimization.
But we’re not going to talk about their full platform, instead…
How Accurate is DupliChecker?
We’re here to talk about DupliChecker’s AI detector. It’s not that different from any other AI detection tool in the market: you just need to copy and paste your text, and it will give you an AI likelihood score. But DupliChecker does have one thing going for them — they allow you to upload text from your PC, Google Drive, or Dropbox.
Now, here’s the thing: DupliChecker claims to have a 100% accuracy when it comes to detecting AI content. Is that accurate? Well, let’s find out by testing it against the most popular AI humanizer in the market.
Undetectable AI vs. DupliChecker: Accuracy
Test #1
DupliChecker: Mistakenly classified Undetectable AI as human.
AI Likelihood Score: 0%
Test #2
DupliChecker: Mistakenly classified Undetectable AI as human.
AI Likelihood Score: 0%
Test #3
DupliChecker: Mistakenly classified Undetectable AI as human.
AI Likelihood Score: 0.4%
Test #4
DupliChecker: Mistakenly classified Undetectable AI as human.
AI Likelihood Score: 0%
Test #5
DupliChecker: Correctly classified Undetectable AI as machine-generated.
AI Likelihood Score: 95%
Test #6
DupliChecker: Mistakenly classified Undetectable AI as human.
AI Likelihood Score: 0%
Test #7
DupliChecker: Mistakenly classified Undetectable AI as human.
AI Likelihood Score: 0.4%
Test #8
DupliChecker: Mistakenly classified Undetectable AI as human.
AI Likelihood Score: 0.3%
Average Score
|
DupliChecker vs. Undetectable AI |
|
Overall Thoughts?
That score is too low to trust for DupliChecker. Granted, I’m using an AI humanizer to test its limits, but there have been free AI detectors (GPTZero and Sapling comes to mind) that’s done way better than DupliChecker.
The Bottom Line
Let’s cut to the chase — with a 12.5% success rate against Undetectable AI, DupliChecker isn’t just missing the mark, it’s not even in the same ballpark.
The reality is, we need reliable AI detection tools now more than ever. Students are getting hit with false positives, content creators are navigating a minefield of AI accusations, and businesses are trying to maintain authenticity in their communications. Empty promises and inflated accuracy claims aren’t just misleading — they’re potentially harmful.
So, if you’re in the market for an AI detector, do yourself a favor and skip DupliChecker. There are better options out there that won’t leave you guessing whether that 100% human score is actually worth the pixels it’s displayed on.
But if you’re looking for an accurate AI bypasser, then Undetectable AI deserves your money. It’s reliable, ethical, and fast. If you’re looking for more proof, check out our article testing it against 8 (yes, eight) different AI detectors.
Remember, in the world of AI detection, if it sounds too good to be true, it probably is. And DupliChecker? Well, it’s just another one that bites the dust.
