StealthGPT Review: AI Humanizer Pricing, Features and User Reports

StealthGPT is one of the most well-known AI humanizer tools on the market, with 1.5M+ active users (its own figure) and a feature set that goes well beyond simple text humanization. But at $6.99 a week to $179.99 a month (as of Oct 2026), is it actually worth the price? After digging through published test results, real user reviews, and current pricing data, the answer is more complicated than StealthGPT's marketing suggests.

Disclosure: This review is published on the HumanizeThisAI blog. We compete with StealthGPT. We've done our best to be accurate and fair, sourcing data from published reviews and user reviews. StealthGPT pricing and features were last checked in October 2026.

What Is StealthGPT?

StealthGPT launched in 2023 and has grown into a multi-tool AI writing platform. At its core, it's an AI humanizer — you paste in AI-generated text and it rewrites the content to evade AI detection tools. But unlike simpler humanizers, StealthGPT has expanded into a broader ecosystem that includes an AI content generator, a built-in AI detector, an SEO writer, study tools, and a Chrome extension.

The platform targets two main audiences: students who need to submit AI-assisted work that passes Turnitin and GPTZero, and content creators who want AI-generated marketing copy that doesn't get flagged. The study tools, such as Photo-to-Answers, are clearly aimed at the academic market.

StealthGPT uses its own models to rewrite text: Super (the flagship), Standard and Lite. Samurai, sold as a premium engine for $4.99/month in 2024, is now an add-on that adds 10,000 words ($2.99/week, $7.99/month or $79.99/year).

How Much Does StealthGPT Cost in 2026?

StealthGPT's pricing has changed over time, and the numbers you find online are often outdated. Here's what the plans actually cost as of Oct 2026, from their pricing page and support center. Each plan is sold weekly, monthly or yearly.

A few important details the pricing page doesn't make obvious:

• The Samurai add-on costs extra. It adds 10,000 words for $2.99/week, $7.99/month or $79.99/year. No plan or add-on is a guaranteed way of bypassing Turnitin.
• Word caps exist. Pro covers 50,000 words a month (12,500 a week) at up to 1,000 words per request. If you're processing a lot of content, you'll hit that ceiling.
• There is no free humanizer plan. New users pay $1 for 3 days, then the plan price. Only the AI detector is free (up to 200 words per scan).

How StealthGPT's Pricing Compares

To put those numbers in context, here's how StealthGPT stacks up against other AI humanizers at the entry level:

StealthGPT's Pro plan at $29.99/month is 5x the price of HumanizeThisAI's Starter plan and 3x the price of Undetectable AI's entry point (as of Oct 2026).

What Features Does StealthGPT Include?

Credit where it's due: StealthGPT packs a lot of features into the platform. This isn't a one-trick humanizer. Here's what's included.

AI Humanizer (Core Feature)

The main event. You paste AI-generated text, choose a model (Super, Standard or Lite), and StealthGPT rewrites it to evade detection. StealthGPT says Super is its strongest model for getting past detectors like GPTZero. Pro accepts .doc and .txt uploads, and Max adds PDF and image files, which is convenient for longer documents.

Stealth Writer (AI Content Generator)

Rather than humanizing existing AI text, Stealth Writer generates "undetectable" content from scratch. You provide a prompt and it produces text that's supposed to fly under the radar from the start. The idea is solid, but the execution depends heavily on the prompt quality and the length of content you're generating.

Built-in AI Detector

StealthGPT includes an AI detection checker so you can verify your output before using it. The free version scans up to 200 words at a time.

Study Tools

The Photo-to-Answers tool targets students. Upload a photo of a problem set or exam question and StealthGPT generates answers. It is clearly designed for the academic market and works separately from the humanizer. It's a nice bonus if you're already paying for the subscription, but it's not why most people sign up.

SEO Writer and Chrome Extension

The SEO Writer generates SEO-optimized content, and there's a Chrome extension for in-browser humanization. The extension is convenient for quick edits directly in Google Docs or email clients.

Interface and UX

StealthGPT uses a modern interface, with light and dark themes, that's responsive and looks polished. StealthGPT says its API returns results in under 5 seconds. There's also an iOS app for mobile use, which is a differentiator. The UX is genuinely one of StealthGPT's stronger points.

Does StealthGPT Actually Bypass AI Detectors?

This is the section that matters most for anyone considering StealthGPT. The marketing promises "undetectable" AI content, but how does it actually perform when independent reviewers put it through real detectors?

The most detailed public test we could verify comes from Originality.ai, which sells an AI detector, in August 2026. The numbers aren't pretty.

Students who need to pass multiple detectors simultaneously should test against each one.

Output Quality: How Does the Text Actually Read?

Bypass rates are only half the equation. If the humanized text reads like garbled nonsense, it doesn't matter whether detectors catch it — your professor or editor will. This is where StealthGPT's reviews paint a concerning picture.

In a February 2024 review, detector maker Winston AI wrote that StealthGPT "makes the writing terrible" and that "the structure of some of the sentences is bizarre." Understanding what AI writing patterns detectors look for helps explain why swapped synonyms still get caught.

What Real Users Say: Trustpilot and AppSumo Reviews

StealthGPT has a 3.9 out of 5 rating on Trustpilot across 206 reviews (as of Oct 2026). AppSumo users rated it 3.64 out of 5 from 22 verified purchasers. That Trustpilot score looks respectable at first glance, but the distribution tells a different story:

• 65% of reviews are 5 stars
• 9% are 4 stars
• 3% are 3 stars
• 4% are 2 stars
• 19% are 1 star

That 19% one-star rate is unusually high. When nearly one in five reviewers gives the lowest possible rating, it suggests significant issues for a meaningful segment of users.

Common Praises

• Responsive customer support. Multiple reviewers specifically named support team members and praised quick issue resolution.
• Ease of use. The interface is clean and the workflow is straightforward.
• Helpful for short-form content. Users working with shorter texts report better experiences.

Common Complaints

• Unauthorized charges. One verified Trustpilot reviewer reported $359.76 in unauthorized monthly charges over two years after attempting to cancel a free trial. Billing complaints appear in multiple reviews.
• Detection bypass doesn't work as advertised. One frustrated reviewer wrote: "the whole business model for the company is the fact we are paying money for the promise that the AI is untraceable, which as of lately is just false advertisement."
• Difficulty cancelling. Multiple users report locked subscriptions and denied refund requests.

StealthGPT Pros and Cons

What StealthGPT Does Well

• Broad feature set. Humanizer, content generator, AI detector, SEO writer, study tools, and Chrome extension under one roof. If you want a platform rather than a single tool, it offers more breadth than most competitors.
• Multiple models. The Super, Standard and Lite models give you options.
• Modern interface and mobile app. The UI is well-designed, and the iOS app provides genuine mobile convenience.
• File upload support. Accepting .doc and .txt uploads (plus PDF and images on Max) is a real convenience for students processing existing documents.
• Good customer support when reachable. Multiple reviewers praised the responsiveness of the support team.

Where StealthGPT Falls Short

• Fails Originality.ai's test. Originality.ai's own test scored StealthGPT output at 100% AI confidence. Tests like this matter more, especially after Turnitin launched dedicated AI bypasser detection in August 2025.
• Expensive for what you get. At $29.99/month (or $6.99/week) for the cheapest plan, it's still pricier than several competitors. The Samurai add-on costs another $7.99/month.
• Output quality issues. Reviews such as Winston AI's (2024) criticize the writing quality.
• Billing and cancellation complaints. Reports of unauthorized charges and difficulty cancelling subscriptions are concerning.

StealthGPT vs HumanizeThisAI: A Direct Comparison

We're biased here — we sell a competing product. But the numbers speak for themselves.

StealthGPT wins on feature breadth. If you want study tools, an SEO writer, and a content generator bundled with your humanizer, it's genuinely one of the more comprehensive platforms available. But if your primary goal is reliable AI text humanization at a reasonable price, the value proposition doesn't hold up against HumanizeThisAI's $5.99/month Starter plan — or even the 1,000-word free tier that lets you test before paying anything.

For a broader comparison of how all the major humanizers stack up, see our comparison of 15 AI humanizers, free and paid.

The “Detected? Get Your Money Back” Terms

StealthGPT advertises a refund if its output is flagged. The conditions matter, so read them before you rely on it (from the terms of service, updated August 2026).

• You must send a screenshot from an accepted detector: Turnitin, GPTZero, ZeroGPT or Copyleaks. Originality.ai results are excluded.
• Weekly and monthly subscribers get a refund for the current billing cycle. Annual subscribers get that month plus a prorated refund.
• Output you chose to use despite a high-risk score from StealthGPT's own built-in stealth check is excluded.

In practice that means the guarantee covers a narrow case: a flagged result on a supported detector, from text the tool itself did not warn you about. It is a useful safety net, not a promise that detectors will not flag the output.

API and Integrations

Developers can reach StealthGPT through a REST API (the Super model costs $0.05 per 100 words, and a pay-as-you-go Developer plan costs $0.20 per 1,000 words), an MCP server for tools such as Claude and Cursor, n8n and Zapier connectors, and a WordPress plugin. Check the current rates on its API page before you build on them.

Who StealthGPT Is Actually For

Despite the issues, there are situations where StealthGPT makes sense:

• You want an all-in-one AI writing platform. If you'll use the study tools, SEO writer, and content generator alongside the humanizer, the bundled pricing starts to make more sense. You're paying for a suite, not just a humanizer.
• You don't need to pass Originality.ai. StealthGPT did better against lighter detectors like Writer in Originality.ai's test. If your content isn't being checked by Originality.ai or Turnitin specifically, the bypass rates may be sufficient.

Who Should Look Elsewhere

• Students submitting through Turnitin. Turnitin now looks for text modified by humanizer tools. If that's your primary concern, see our guide on whether Turnitin can detect humanized AI.
• Budget-conscious users. At $29.99/month for Pro, StealthGPT is one of the most expensive options for what's essentially the same core function other tools offer at a fraction of the price.
• Anyone writing long-form content. Pro caps each request at 1,000 words, so essays, articles, and reports need several runs.

The Verdict: Is StealthGPT Worth It in 2026?

StealthGPT is a feature-rich platform that tries to be the Swiss Army knife of AI writing tools. And for some users, that breadth genuinely has value. The study tools are a unique differentiator, the interface is polished, and customer support gets consistent praise.

But the core promise — that your AI-generated content will be undetectable — doesn't hold up under independent scrutiny. When Originality.ai's own test still flags the output at 100% AI confidence, you're paying $29.99/month for a tool that isn't doing its main job against the detectors that matter most.

The output quality concerns amplify the problem. Even when the text does bypass detection, incoherent phrasing and grammatical errors mean you'll still need to spend time editing — which defeats the purpose of automation.

Our honest assessment: StealthGPT isn't worth $29.99/month for most users who primarily need AI text humanization. The bypass results we could verify are weak, the output quality draws complaints, and the pricing is too high relative to alternatives that focus on doing one thing well.

If you want a dedicated humanizer that you can try before paying, start with the HumanizeThisAI free tier (1,000 words/month with a free account). Run your text through our free AI detector to verify the output yourself. If it works for your content, our Starter plan at $5.99/month gives you 15,000 words, for about a fifth of StealthGPT's monthly Pro price.