StealthGPT AI Humanizer Review (2026): Pricing & Alternatives

StealthGPT is a general-purpose AI humanizer for students, bloggers and marketers who want quick rewrites of AI drafts. It comes with a built-in AI detector and an academic tone, but it's made for every kind of writing. If you're humanizing a thesis chapter or a journal paper, a humanizer built for research writing is a better fit.

This StealthGPT AI humanizer review covers what the tool does, what it costs and how the US$1 trial works. You'll also find a side-by-side comparison with the ProofreaderPro humanizer, short comparisons with the tools people check next, and a list of StealthGPT alternatives.

Here's StealthGPT at a glance:

What is StealthGPT?

StealthGPT is an AI humanizer and writing suite made by XYZ AI, Inc. You paste in text from ChatGPT, Claude or another AI writer, and it rewrites the text so it sounds more like a person wrote it. StealthGPT says it has more than 1.5 million active users.

The humanizer is the main tool, but the subscription includes more. There's an AI detector for checking your result, Stealth Writer for drafting, and Stealth Agent, which takes a topic from research to a finished post. Smaller tools, such as a summarizer and a grammar checker, come with it too.

The layout is one text box with two menus underneath it, Settings and Model, and an arrow button that runs the rewrite.

How to use StealthGPT

1. Create an account on stealthgpt.ai. You can sign up with Apple, Google or your email address.
2. Paste your text into the humanizer, upload a file, or click "try a sample" to see how it works first.
3. Pick a model. Super is the default, and Lite is the faster option for quick drafts.
4. Open Settings if you want the em-dash remover or the quality checks.
5. Click the arrow to humanize, then run the result through the built-in AI detector if you want a score.
6. Compare the rewrite with your draft and fix anything that changed your meaning.

If your text is longer than your plan's limit per request, humanize it in parts. On Pro, that means sections of up to 1,000 words.

StealthGPT features

Super and Lite models

The humanizer has two models. StealthGPT describes Super as its strongest option, with the full rewriting pipeline, and Lite as the fastest rewrite for quick drafts.

Super is the default. Lite makes sense when speed matters more than polish, such as a first pass over a rough draft.

Em-dash remover and quality checks

The Settings menu has two options. The em-dash remover replaces em dashes with other punctuation, and the quality checks look at similarity, facts, tone and hallucination risk in the rewrite.

The quality checks help most on longer pieces, where a changed fact or an invented detail is easy to miss. If you only need the em dashes gone, our free em dash remover does that too.

Tone settings and citations

StealthGPT says you can set the tone before you humanize, with options such as academic, professional and casual. The academic tone is the one to pick for essays and reports.

StealthGPT says the humanizer keeps your citations and structure intact, and it lists in-text citations as a feature on all three plans.

Built-in AI detector

Every plan includes StealthGPT's AI detector, so you can check a score right after you humanize. Keep in mind that detectors often disagree with each other, so a score from one tool doesn't tell you what another tool will say.

Languages, file upload and apps

StealthGPT's pricing page lists 100+ languages on every plan. File upload depends on the plan: Pro takes .doc and .txt files, while Max and Enterprise also take PDFs and images.

Every plan comes with the Chrome extension and the iOS app. Enterprise adds API access, MCP support and custom fine-tuned models for teams.

Stealth Writer and other tools

The subscription also includes Stealth Writer, an AI writer, and smaller tools such as a summarizer, a sentence rewriter, a grammar checker and a chat-with-PDF tool. If you only want a humanizer, you won't need most of them, but they're handy if you write a lot of web content.

StealthGPT pros and cons

StealthGPT does several things well, and a few details are worth checking before you pay.

Pros

• A US$1 trial for 3 days, so you can test it on your own text first.
• A built-in AI detector on every plan.
• 100+ languages and an academic tone option.
• Up to 2,000 words per request on Max, and 10,000+ on Enterprise.
• A Chrome extension and an iOS app on every plan.

Cons

• Pro limits each request to 1,000 words.
• PDF upload starts on the Max plan.
• The US$1 trial becomes a paid plan after 3 days unless you cancel.
• There's no setting to keep field-specific terms unchanged.

How much does StealthGPT cost?

StealthGPT pricing starts at US$6.99 a week, US$29.99 a month or US$24.99 a month on yearly billing. New users can start Pro or Max for US$1 for 3 days on weekly or monthly billing. Here are StealthGPT's prices on 2 October 2026:

After the 3-day trial, the plan renews at its full weekly or monthly price unless you cancel. Samurai is an add-on for Pro and Max, and StealthGPT says it adds an extra 10,000 words.

For regular use, I'd pick Pro on yearly billing, which gives you 50,000 words a month for US$24.99. Max makes sense if you humanize long documents, since each request can take 2,000 words.

StealthGPT's money-back policy

StealthGPT has a money-back policy for detector flags. If an accepted detector, such as Turnitin, GPTZero, ZeroGPT or Copyleaks, flags text that StealthGPT humanized, you can send a screenshot and get a refund for your current billing cycle. Annual users get a refund for that month plus a prorated refund for the rest of the year.

The policy has its own conditions, and StealthGPT's Terms say other purchases are non-refundable. Read both before you rely on the policy.

Is StealthGPT worth it?

StealthGPT is worth it for general writing if you want a fast humanizer with a detector in the same place. For academic writing, a humanizer built for research writing is a better fit.

For blogs, emails and marketing copy

If you write blog posts, newsletters, product pages or social posts, StealthGPT gives you a quick rewrite in many languages. The detector lets you check the result without opening another site, and the US$1 trial is enough to see whether you like the output.

For academic writing

StealthGPT has an academic tone and says it keeps citations intact, so it can handle a typical essay. A research paper needs more: your citation style and defined terms have to stay exactly as you wrote them, and your supervisor may want to see every change. A humanizer built for research writing does both, and it works alongside a proofreader in the same editor.

Tips for humanizing academic writing

Whatever tool you use, these habits keep your paper in good shape:

• Humanize one section at a time, so you can check each part against your draft.
• Check that every citation, number and defined term survived the rewrite. Our free AI citation checker helps with the reference list.
• Don't treat one detector score as final. If your own writing gets flagged, our guide on how to appeal a false AI-detection flag explains the steps.
• Disclose the AI help the way your university or journal asks. Our AI disclosure statement guide has wording you can adapt.

For a wider view, our 2026 humanizer comparison compares twelve humanizers on academic text.

StealthGPT AI Humanizer vs. ProofreaderPro Humanizer

The main difference is focus. StealthGPT is a general-purpose humanizer with a large tool suite, and the ProofreaderPro humanizer is built for academic writing.

Pick StealthGPT if you want fast rewrites of general writing in many languages, with a detector in the same place. Pick ProofreaderPro.ai if your writing has citations or field-specific terms, or if your supervisor wants to review the changes.

ProofreaderPro.ai also keeps your whole paper in one editor. You can proofread a chapter, humanize the sections that need it and check your citations, then export a Word file with tracked changes.

StealthGPT AI Humanizer Alternatives

People most often compare StealthGPT with Undetectable AI, StealthWriter, WriteHuman and Walter Writes. Each of these humanizers suits a slightly different kind of writing, and we've written about all of them.

StealthGPT vs Undetectable AI

Both are general-purpose humanizers with a detector in the same place. Undetectable AI focuses on humanizing and checking a score, while StealthGPT adds Stealth Writer, a Chrome extension and an iOS app. The easiest way to choose is to run the same paragraph through both and keep the version you prefer.

StealthGPT vs StealthWriter

StealthWriter is a separate humanizer with a similar name. It offers a deep scan option for more thorough rewrites, while StealthGPT gives you two models, tone settings and its own detector. Both suit general writing.

StealthGPT vs WriteHuman

WriteHuman keeps things simple with quick one-click rewrites. StealthGPT gives you more control, with two models, tone settings and quality checks. If you want the fewest steps, WriteHuman is the simpler of the two.

StealthGPT vs Walter Writes

Walter Writes AI learns your writing voice from a sample before it rewrites anything, which suits personal essays and other writing where your voice matters. StealthGPT works the same way for every user and adds a detector and a writing suite.

For academic writing, I'd start with ProofreaderPro.ai, since it's built around citations and technical terms. For general writing, StealthGPT and the tools above will all do the job.

Frequently asked questions

Q: Is StealthGPT free?

StealthGPT's plans are paid, but new users can try it for US$1 for 3 days. After the trial, Pro costs US$6.99 a week or US$29.99 a month unless you cancel.

Q: Does StealthGPT have a free trial?

StealthGPT has a US$1 trial for new users, which gives you 3 days on Pro or Max. If you don't cancel, the plan renews at its full weekly or monthly price.

Q: Is StealthGPT legit and safe to use?

Yes, StealthGPT is a real, paid service from XYZ AI, Inc. It says it doesn't share your content with detectors or third parties. Read its privacy policy before you upload documents, and follow your school's rules on AI-assisted writing.

Q: How many words can I humanize with StealthGPT?

It depends on your plan. Monthly and yearly Pro include 50,000 words a month and Max includes 200,000, while Enterprise starts at 1,000,000. Each request is limited to 1,000 words on Pro, 2,000 on Max and 10,000+ on Enterprise.

Q: What is StealthGPT's Samurai engine?

Samurai is an add-on for the Pro and Max plans. StealthGPT says it adds an extra 10,000 words to your plan.

Q: Does StealthGPT work in other languages?

Yes. StealthGPT's pricing page lists 100+ languages on every plan.

Q: Does StealthGPT have an AI detector?

Yes, every StealthGPT plan includes an AI detector, so you can check a score right after you humanize. Detectors often disagree with each other, so treat any single score as an estimate.

Q: How do I cancel StealthGPT?

You cancel from your account page on stealthgpt.ai. The cancellation takes effect at the end of your current paid period.

Q: Does StealthGPT offer refunds?

Only through its money-back policy. If an accepted detector, such as Turnitin, GPTZero, ZeroGPT or Copyleaks, flags text that StealthGPT humanized, you can send a screenshot and get a refund for your current billing cycle. StealthGPT's Terms say other purchases are non-refundable.

Q: What is the best StealthGPT alternative for academic writing?

ProofreaderPro.ai is the best StealthGPT alternative for academic writing, because its humanizer keeps citations and technical terms in place and exports tracked changes. For general writing, Undetectable AI and WriteHuman are common picks.

Academic AI Humanizer

Humanize your AI-assisted writing while protecting citations, terminology, and academic tone.