StealthGPT Review 2025: Can It Really Bypass AI Detectors?

The world of AI writing tools is expanding faster than ever. Alongside the rise of ChatGPT and other large language models, we’ve also seen the rise of AI detection tools—software designed to identify whether text was written by a human or generated by AI. Naturally, this gave birth to a new type of service: AI humanizers that claim to make AI text look indistinguishable from human writing.

Two names stand out in this space: StealthGPT and GPTHumanizer.ai. Both promise to help you humanize AI text and avoid detection, but how do they really compare?

In this review, I’ll walk through their features, pricing, performance, and real user feedback, to help you decide which one is right for you.

What is StealthGPT?

3.9/5.0 star rating on Trustpilot bills itself as an “Undetectable AI” platform. Its value proposition is simple: No matter the use case, whether you’re looking to generate text directly using the proprietary Stealth Writer, or you have existing AI-generated text you want to bypass detectors with, StealthGPT will create text that can fool a variety of AI detection tools, including GPTZero, , Originality AI, Turnitin, and ZeroGPT.

Key features include:

●Writer: AI text generator designed to create undetectable text.

●AI Humanizer: For rewriting existing AI text.

●AI Checker: Built-in detectors to try your chance.

What is GPTHumanizer?

GPTHumanizer takes a more focused but very useful approach. It does not create full text. Instead, it changes and improves AI content to make it sound more clear, simple, and human.

Main features include:

●AI Humanizer: changes the words and structure of AI text while keeping the meaning.

●AI Detector: checks text for AI and shows how much it sounds like a machine.

●Multiple Modes: different ways to rewrite (Fast, Balanced, Enhanced) focusing on speed, writing style, or full rewrite.

It’s different from StealthGPT, as it’s not mainly a standalone text generator. Instead, it is more professional and focusing on working alongside ChatGPT (or any AI model) and makes the content sound more like natural human writing.

Features Compared

Performance: Can They Really Fool Detectors?

StealthGPT claims it’s undetectable. It does often lower scores on GPTZero or Originality AI, according to the internet and customer reviews. But lots of users say you can tell it’s no longer human text. It becomes awkward or the sentences seem unnatural.

GPTHumanizer focus on making AI-generated text sound more human. It prioritizes readability, making text flow smoothly and naturally. There’s less focus on bypassing every single detector. It seems more consistent in creating text that passes the “this sounds human” test. But for the hardest detectors, you’ll have to play with settings.

Pricing Breakdown

StealthGPT Pricing

●Essential: $24.99 / month — 750 max input words, 50 daily usage, English only.

●Pro: $34.99 / month — 1000 max input words, 100 daily usage, 100+ Languages.

●Business: $49.99 / month — 1500 max input words, 500 daily usage, 100+ Languages.

●Enterprise: $249.99 / month — 1500 max input words, Unlimited daily usage, 100+ Languages.

StealthGPT is technically “unlimited,” but in practice, there are usage caps (daily limits, character/word input limits, file size limits, etc.).

GPTHumanizer Pricing

●Free Plan: Unlimited usage on free model, 200 words/request, totally enough for daily work;

●Basic: All in Free Plan, $4.99 / month, 800 words per request, 5000 words/month on Lite/Pro/Ultra model;

●Standard: All in Basic Plan,$9.99 / month, 1200 words per request, 30000 words/month on Lite/Pro/Ultra model;

●Pro: All in tandard Plan,$14.99 / month, unlimited words per request, unlimited words/month on Lite/Pro/Ultra model;

It is clear that GPTHumanizer is more specialized and focused on AI humanizer functionality. The free plan is already sufficient for everyday needs, while the advanced plans are more affordable and cost-effective compared to StealthGPT. Meanwhile, it supports most major languages.

Real User Reviews

Let’s turn to Trustpilot for reviews of StealthGPT to give you a balanced answer:

● Positive experiences:

“I’ve been using Stealth GPT for over a year for work and school. It has been amazing! The recent updates made it even more versatile for my writing.”

● Negative experiences:

“It will pass AI detection but the content isn’t legible. No one writes like the output, and it isn’t formal writing. Only subscribe if you don’t care about the quality of your writing.”

“This app is not worth the money I paid for it. It hasn’t helped in any way.”

So the reality is as I mentioned in the previous sections: StealthGPT can help with detection bypass but the output quality is hit or miss.

GPTHumanizer doesn’t have similarly reliable public usage statistics on Trustpilot yet but based on user feedback and product focus, the tool should score high on readability and naturalness, but not on guaranteed bypass success.

Pros and Cons

StealthGPT

Pros

● End-to-end feature suite: generation+rewriting+detection bypass.

● Multilingual support (100+ languages)

● Extreme Stealth Mode, SEO tools, and advanced options

● Good customer support by user feedback

Cons

● Awkward phrasing/unnatural flow drops output quality

● More expensive than alternatives

● 100% undetectable claims are fake—the detectors regularly catch the output

● Limited use cases in spite of the “unlimited” package

GPTHumanizer

Pros

● Specialized in AI humanizer functionality

● Cost-effective and beginner-friendly

● Zero learning curve—paste, humanize & copy

● Natural readability and meaning preservation

● Can turn your AI drafts into more professional writing

Cons

● Not a content generator – can’t generate full-length articles from a prompt alone

Final Verdict: Which One To Choose?

If you want an all-in-one text generation, rewriting, and detection testing platform—and you don't mind the higher price tag to access more languages and “stealth” modes for different AI detectors—then StealthGPT is worth considering. But you’ll likely need to further edit and refine its output for readability.

If you just want an easy, affordable, and effective humanizer for existing AI writing—and “natural flow” is your chief priority—then GPTHumanizer is a better choice.

No matter which one you choose, one thing is clear: a perfect AI humanizer does not exist. You should ALWAYS check the final draft and manually polish and proofread it. These tools will get you 90% there. Your human touch is what will make it shine.