Undetectable AI Review – How To Easily Bypass AI Writing Detection

AI has been the hottest topic in the tech world over the last five years, and you'd probably be sleeping under a rock if you've never heard of ChatGPT.

Once it became apparent that LLMs are here to stay, one of the questions that has remained on everyone’s mind is how consistently can you actually detect AI writing? The short answer is to run it through an AI detection tool that may or may not be accurate.

The thing is: AI writing detectors aren’t what they used to be. Back in 2023, tools like GPTZero and Originality were hit-or-miss at best. By 2025, though, detection has gotten a lot sharper. Platforms like Sapling, CopyLeaks, and Winston AI now catch most copy-paste ChatGPT outputs with surprising accuracy.

But that’s exactly why AI humanizers are having their moment — and right now, Undetectable AI is still one of the best at the job. Instead of clunky rewrites that sound stitched together, this tool takes raw AI text and reshapes it into something that feels like a person actually wrote it. 

How Undetectable AI Works

All you have to do is take a piece of your writing and paste it into their tool. In about 10 seconds or so, you'll get a revised piece of writing that bypasses most of the popular AI writing detection tools (both the harsh & forgiving ones).

It takes your writing and is able to rephrase your words & sentence syntax to make it seem a lot more human-like. Check this out, I got a generic response from ChatGPT, threw it into Undetectable, and then tested both results:

And here's what it looks like in Sapling, QuillBot, and BrandWell’s AI's detection tools:

Pretty awesome, right? Not one managed to flag the text as AI-generated. Not to mention, it's really affordable to change a bunch of writing at scale.

But you might be saying: “Hey, this is just a pretty small sample size of one.” Well, in that case, we’ve got you covered. We’ve written a bunch of articles on Undetectable AI since 2023 — and the only thing you need to know is that it works. 

Key Features

You'll have a few options you can change if you want to get a bit more creative.

Readability Level

You can adjust the readability of your writing to range from high school all the way to the doctorate level. You could also change the tone to be more like a journalist or aimed at marketing copy.

Purpose of Writing

You could combine the readability level with the intended purpose of your writing like essays, articles, stories, cover letters, or business reports. You could make some very niche rewrites, like to rewrite essays in the context of college, a doctorate level business report, etc.

Readability vs. Human Scale

Another great feature is the choice to depend on how "much" you want to change your writing. 

If you want it more readable, you'll have a better sentence that makes a lot more sense to read out loud but might get picked up within AI detectors. If you want to lie more on the cautious side, you could select “more human” and will find that to be pretty unique.

I have noticed that the more human option often doesn't make as much sense as the other options (when reading the content). More readable is also a coin toss regarding whether it gets picked up by the detectors. I personally think “balanced” is the best setting for this part.

And those are pretty much the only things you'll need to know how to use before getting your writing paraphrased to bypass these AI writing detectors. They do have an API if you're a developer and need bulk access to the tool.

Further, all your documents are saved on the documents page. You can view each generation you've submitted throughout your account's history.

AI SEO Content Writer

If you need more details and want to write something completely from scratch, they also offer an AI SEO tool that outlines, drafts, and fully writes articles at various lengths. Very helpful if you're trying to use it to draft full articles at a way more affordable (and still undetectable) rate than other AI SEO writing tools.

Other Features

The Undetectable AI team has also expanded their feature set to lean more towards being a writing assistant than being just an AI humanizer. 

Here is a quick look of what else they’re offering:

• AI Human Typer
• AI Smart Job Applier
• AI Image Detector
• AI Essay Writer
• AI Cover Letter Generator
• AI Writing Style Replicator

Pros & Cons

Pricing

The tool has monthly and yearly plans available. The basic annual plan gives you access to 10,000 words for $15 per month, which you can adjust if you ever need more. You also get a much bigger discount if you purchase a larger word plan, so it might be useful to go in with some friends if you're looking to change writing quite frequently.

You can also cancel these plans at any time without hesitation. If you only need to change a few papers, you can cancel the plan right after you buy it.

Alternatives

If this was 2023, the only alternative that does exactly what Undetectable does is HideMyAI. This tool offers pretty much everything Undetectable has but comes with a slightly more generous free plan and a few more writing customizations.

But since then, many AI humanizers have popped up in response to the rising cases of false positive AI detection, especially in schools. This includes:

• Grammarly’s AI Humanizer
• Rephrasy
• Jenni AI
• BypassGPT
• Netus AI
• GPTinf

But the thing is: I’ve yet to find an AI humanizer that’s as consistent as Undetectable AI. Another hallmark of a good product is innovation — which is something that the Undetectable AI team continues to embody, never letting their site go stale with new features seemingly each week.

Undetectable AI may be the past — but it’s also clear that they’re the future.

Final Thoughts

Undetectable AI isn’t just surviving in 2025—it’s thriving. Detectors are smarter, the AI writing landscape is more crowded, but this tool has adapted. Between the Smart Editor, Cover Letter Generator, and better bulk handling, it’s evolved past being “just another paraphraser.”

Is it bulletproof? No. Push it too hard and you’ll still get the occasional clunky sentence or shorter output. But compared to the rest, it strikes the cleanest balance between usability, natural writing, and stealth.

For students trying to avoid red flags, for job hunters writing human cover letters, or for businesses scaling content, Undetectable AI remains one of the safest bets in the AI humanizer space.