StealthGPT AI Humanizer Review (2026): Is It Worth It?
StealthGPT AI humanizer review: worth it for fast multilingual rewrites, with weekly, monthly and yearly plans, a US$1 trial, and ProofreaderPro compared.
StealthGPT is a paid AI humanizer and writing suite, and it's worth it for writers who want fast rewrites, an AI detector and an AI writer in one place. For a thesis or journal paper with citations and technical terms to keep, an academic humanizer is the better fit.
Billing is where a StealthGPT AI humanizer review gets practical. StealthGPT sells the same Pro and Max plans by the week, the month or the year, so the right choice depends on how long you need the tool.
What is StealthGPT?
StealthGPT is an AI humanizer from XYZ AI, Inc., with a set of writing tools built around it. You paste text from ChatGPT, Claude, Gemini or another AI writer, and it rewrites the draft with new sentence structure and word choice. StealthGPT says it has more than 1.5 million active users.
The humanizer is the center of the product, and the subscription adds an AI detector, Stealth Writer, Stealth Agent and more than a dozen smaller tools. Those include a grammar checker, a summarizer, a text simplifier, a formalizer and a chat-with-PDF tool. StealthGPT also runs a Chrome extension, an iOS app and an API for business customers.
Super, Lite and the Settings menu
StealthGPT's humanizer is one text box with two menus under it, Model and Settings. You paste your draft or try a sample, pick a model, then click the arrow to rewrite.
The 1,000-word box
The box shows a word limit of 1,000, which is the per-request limit on the Pro plan. Max raises it to 2,000 words per request and Enterprise to 10,000 or more.
A 4,000-word report on Pro takes four requests, so you paste and copy back four sections. Our free word counter shows the length of each section before you paste it, which keeps every request under the limit.
Super and Lite
The Model menu has two options. Super is the default, and StealthGPT describes it as its strongest model with the full rewriting pipeline. Lite is the fastest rewrite, meant for quick drafts.
Use Super for anything you'll publish or submit, and Lite for a first pass over a rough draft.
Em-dash remover and quality checks
The Settings menu has two switches. 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 matter most on long pieces, where a changed figure or an added detail is easy to miss. Read flagged sentences against your original before you keep them. If you only want the dashes gone from a finished text, our free em dash remover does that job on its own.
Tone, citations and file upload
StealthGPT says you can set a tone before you humanize, with options such as academic, professional and casual. Its plan table lists in-text citations as a feature on every plan, and StealthGPT says the humanizer keeps citations and structure intact.
For anything with a reference list, check each in-text citation against your sources after the rewrite. Our free AI citation checker finds references that don't match a real publication. File upload depends on the plan: Pro takes .doc and .txt files, while Max and Enterprise also take PDFs and images.
The tools around StealthGPT's humanizer
StealthGPT's subscription is a full writing suite, and the extra tools are a big part of what you pay for. If the humanizer is all you need, you'll use few of them.
The built-in AI detector
Every plan includes StealthGPT's AI detector, so you can check a score right after you humanize. Any detector score is an estimate, and different detectors often score the same paragraph differently.
A sensible routine is to check the draft, edit the flagged sentences by hand, then check again. Treat the score as a guide to which sentences sound generic.
Some of StealthGPT's user quotes mention scores of 0%, but a zero score is an unrealistic target for most writing. Our article on whether a 0% AI score is possible explains why, and what a sensible target looks like.
Stealth Writer and Stealth Agent
Stealth Writer is StealthGPT's AI writer for essays and articles. Stealth Agent goes further: it takes a topic from research to finished content, with SEO, academic and social formats.
The tool list also includes an SEO Writer and an AI SEO Optimizer for web content. For a blog or a content site, the writer and agent can produce drafts that the humanizer then rewrites. Ranking still depends on the page's keywords and usefulness. Our article on AI humanizers for SEO content explains how keyword protection works during a rewrite.
Watermark tools
StealthGPT's tool list also includes a watermark remover and a Claude watermark remover and detector. Both are aimed at hidden markers in AI-generated text. Our explainer on the Claude watermark covers what that marker is, when it started and how to check for one.
Chrome extension, iOS app and MCP
Every plan includes the Chrome extension and the iOS app, so you can humanize text in other sites and on your phone. Pro and Max also list MCP access, which lets you use StealthGPT inside tools such as Claude and Cursor. API access starts on Enterprise.
StealthGPT pricing: weekly, monthly or yearly
StealthGPT costs US$6.99 a week, US$29.99 a month or US$24.99 a month on yearly billing for its Pro plan. Every plan includes the humanizer and the detector, and the plans differ by word allowance, words per request and extras. These were StealthGPT's prices on 4 October 2026:
| Plan | Weekly | Monthly | Yearly, per month | Word allowance | Words per request |
|---|---|---|---|---|---|
| Pro | US$6.99 | US$29.99 | US$24.99 | 12,500 a week or 50,000 a month | 1,000 |
| Max | US$19.99 | US$49.99 | US$41.99 | 50,000 a week or 200,000 a month | 2,000 |
| Enterprise | No weekly plan | US$179.99 | US$149.99 | 1,000,000+ a month | 10,000+ |
Max adds PDF and image upload, priority support and 3 team seats. Enterprise adds 5 seats, a dedicated support channel, API access and custom fine-tuned models.
The US$1 trial
New users can start Pro or Max for US$1 for 3 days, on weekly or monthly billing. After the 3 days, the plan renews at its full weekly or monthly price unless you cancel. Set a reminder for day two if you only want to test it. The trial runs on the plan you pick, so choose Max if you want to test 2,000-word requests and PDF upload.
Which billing period to pick
For one deadline, the weekly plan costs the least: two weeks of Pro is US$13.98 and gives you 25,000 words. For a semester, monthly Pro at US$29.99 gives you 50,000 words a month and fewer renewals to track.
For steady use over a year, yearly Pro is US$24.99 a month, about US$300 a year, against US$359.88 for twelve months of monthly billing. Max on yearly billing makes sense if your documents are long, since each request takes 2,000 words. A 30,000-word thesis takes 30 requests on Pro and 15 on Max, and Max's 200,000 monthly words cover several full drafts.
Samurai, cancellation and refunds
Samurai is an optional add-on for Pro and Max. StealthGPT says you can cancel at any time, and the plan stays active until the end of the period you've paid for.
StealthGPT's Terms say purchases are non-refundable outside its money-back policy, which has its own conditions on StealthGPT's support page. Read those conditions before you pay for a long plan.
Keep Your Citations and Terms Through Every Rewrite
ProofreaderPro.ai's humanizer is designed to lower AI scores while citations stay in format and frozen terms stay exactly as written, with tracked-changes export on Academic Plus. Plans start at US$19 a month.
Try the academic humanizerWho StealthGPT suits
StealthGPT suits writers who produce a lot of general content and want one subscription for drafting, rewriting and checking. It suits academic writers less well, since its controls are built for general writing.
Content writers in several languages
StealthGPT lists 100+ languages on every plan, and the Chrome extension works where you already write. For a team that writes blog posts, emails and product pages in several languages, that coverage is the main reason to pick it. Max includes 3 team seats and Enterprise 5, so a small team can share one subscription.
If you write in English as a second language, our guide to the AI humanizer for ESL researchers covers how to keep your meaning clear in a rewrite.
Students writing essays
The academic tone gives an essay a formal register, and the US$1 trial lets you test it on one assignment. Check your university's rules on AI help before you submit anything. Our student guide to AI humanizers lists the checks to make before you hand an essay in.
Researchers with cited papers
A journal paper or thesis chapter needs its citation style, defined terms and figures to stay exactly as written. StealthGPT says it keeps citations intact, but it doesn't have a setting to freeze field-specific terms. In technical fields, a synonym for a defined term can change what a sentence claims, so check each one by hand. The steps in our research paper humanizing guide work section by section, with citations and technical terms protected at each step.
StealthGPT AI Humanizer vs. ProofreaderPro Humanizer
StealthGPT is a general writing suite with a humanizer at its center, while ProofreaderPro.ai's humanizer is made for research writing. The difference shows most on cited papers and long chapters.
| Feature | ProofreaderPro.ai | StealthGPT |
|---|---|---|
| Built for | Theses, journal papers and other academic writing | General writing: blogs, emails, essays and web content |
| Price | US$19 or US$29 a month (US$169 or US$259 a year) | US$29.99 to US$179.99 a month, US$24.99 to US$149.99 a month yearly, or from US$6.99 a week |
| Words per request | 500 on Academic, 1,000 on Academic Plus | 1,000 on Pro, 2,000 on Max, 10,000+ on Enterprise |
| Modes and tones | General and Academic; five modes and five intensity levels on Academic Plus | Super and Lite models, with tones such as academic, professional and casual |
| Citations | Keeps APA, MLA, Chicago, IEEE and Turabian citations in format | In-text citations listed on every plan |
| Technical terms | Freeze terms on Academic Plus | General rewrite |
| Languages | 60+ languages on Academic Plus | 100+ languages |
| Reviewing changes | Tracked changes view and .docx export on Academic Plus | Rewrite with optional quality checks |
| Other tools | AI proofreader, paraphraser, summarizer, translator and citation tools | AI detector, Stealth Writer, Stealth Agent, extension and iOS app |
StealthGPT has more words per request on its higher plans and a larger set of writing tools. For general content in many languages, that makes it a strong all-in-one choice.
For academic work, ProofreaderPro.ai costs less and keeps the parts a paper depends on. Academic Plus at US$29 a month keeps citations in their original style, whether APA, MLA, Chicago, IEEE or Turabian. It also freezes your technical terms and shows every change as a tracked edit. We explain the citation side in more detail in how our humanizer keeps academic citations.
StealthGPT AI Humanizer Alternatives
The best alternative to StealthGPT depends on which part of the suite you need. Some writers want a cheaper humanizer, some want an API on a lower plan, and some need citation handling. For a wider comparison, see our ranking of AI humanizers tested on academic text.
| Tool | Best for | Our write-up |
|---|---|---|
| ProofreaderPro.ai | Academic writing with citations and technical terms kept | Academic AI humanizer |
| StealthWriter | A separate humanizer with a similar name | StealthWriter alternative |
| Undetectable AI | A long-running humanizer with its own detector | Undetectable AI alternative |
| HIX Bypass | Writers who use the wider HIX AI writing suite | HIX Bypass alternative |
| Hastewire | Publishing teams that need many tones and automation | Hastewire AI Humanizer Review |
| Rephrasy | Rewrites in your own cloned writing style, with a 24-hour pass | Rephrasy AI Humanizer Review |
| Ryter Pro | A low-cost humanizer with an API on every plan | Ryter Pro AI Humanizer Review |
StealthGPT and StealthWriter are different tools
StealthWriter is a separate humanizer from a different company, and the similar names cause a lot of confusion. StealthGPT's own site lists StealthWriter among the tools it compares itself with.
If you saw a price or a feature you can't find on stealthgpt.ai, check that you're on the right site. Both suit general writing, so run the same paragraph through each and keep the one you prefer.
Frequently asked questions
Q: Is StealthGPT worth it?
For general writing, yes, especially if you'll use the detector, Stealth Writer and the extension as well as the humanizer. For cited academic papers, an academic humanizer that keeps citation formats and technical terms is the better choice.
Q: How much does StealthGPT cost per week?
Pro costs US$6.99 a week for 12,500 words, and Max costs US$19.99 a week for 50,000 words. Enterprise has no weekly plan.
Q: How does StealthGPT's US$1 trial work?
New users get 3 days of Pro or Max for US$1 on weekly or monthly billing. If you don't cancel, the plan renews at its full weekly or monthly price.
Q: What is the difference between StealthGPT's Super and Lite models?
Super is the default and StealthGPT's strongest model, with the full rewriting pipeline. Lite is the fastest rewrite, meant for quick drafts.
Q: What do StealthGPT's quality checks do?
They check the rewrite for similarity, facts, tone and hallucination risk. You turn them on in the Settings menu under the text box.
Q: Does StealthGPT have an API?
Yes, on the Enterprise plan. Pro and Max include MCP access, which lets you use StealthGPT inside tools such as Claude and Cursor.
Q: Can I upload a PDF to StealthGPT?
PDF upload starts on the Max plan, which also takes images. Pro takes .doc and .txt files.
Q: Does StealthGPT keep citations?
StealthGPT lists in-text citations on every plan and says the humanizer keeps citations and structure intact. Check each citation against your sources after any rewrite, since a reference that changes is easy to miss.
Q: How many languages does StealthGPT support?
StealthGPT lists 100+ languages on every plan, including the humanizer and the detector.
Q: Who makes StealthGPT?
XYZ AI, Inc. makes StealthGPT, and it says the tool has more than 1.5 million active users.
Citation-safe humanizing with frozen technical terms, five modes and five intensity levels, and tracked changes you can export on Academic Plus.
Dana is a content creator at ProofreaderPro, where she runs the daily blog and writing operations. She writes the articles on how the online editing platform works, and she handles customer messages every day, with a five-star satisfaction score to show for it.
