AI draft
Sleep is not just rest; it is the foundation of learning. Students who slept at least 7 hours scored 12% higher on recall tests (Okafor & Lin, 2019), underscoring the profound importance of rest.
HumanGPT vs StealthGPT: free plan, word limits and pricing compared
StealthGPT, from XYZ AI, Inc., is an AI writing suite with a humanizer, an AI detector, an essay writer and a research agent.1 HumanGPT is an iPhone app that rewrites AI drafts so they sound like you and checks facts, numbers and citations after every rewrite. Each claim about StealthGPT below has a source.
The short verdict
StealthGPT covers more writing tasks. HumanGPT has a free plan and longer rewrites than StealthGPT Pro or Max.
Choose HumanGPT if…
- You want a free plan: 300 words a day after a free demo rewrite.
- You paste long drafts. Pro takes up to 3,000 words per rewrite.
- You want facts, numbers and citations checked after each rewrite.
HumanGPT vs StealthGPT at a glance
Small numbers link to the sources below.
| Feature | HumanGPT | StealthGPT |
|---|---|---|
| Platforms | iPhone app (iOS 17 or later). A web editor is planned but not live yet. | Web app, Chrome extension and the iOS app "Stealth AI - Study Companion" (iOS 15.1+).125 |
| Free plan | Yes 1 free demo rewrite, then 300 words a day, up to 300 words per rewrite. | Not stated No free plan on the pricing page; the detector page mentions free accounts. New users can try Pro or Max for $1 for 3 days.34 |
| Paid pricing | Pro: $5.99 a week with a 3-day free trial, or $39.99 a year (US prices).11 | Pro: $6.99 a week, $29.99 a month or $299.99 a year. Max from $19.99 a week.6 |
| Word limits | Free: 300 words a day. Pro: 50,000 words a week (fair use), up to 3,000 words per rewrite. | Pro: 12,500 a week or 50,000 a month, 1,000 per request. Max: 2,000 per request. Enterprise: 10,000+.36 |
| Rewriting approach | Anthropic Claude models guided by the open-source humanizer skill (26 patterns from Wikipedia's "Signs of AI writing"). Tones, strength, text types; voice matching and sentence rewrite on Pro. | "Super" and "Stealth Lite" modes. Tones: Standard, High School, College, Ph.D.1 |
| AI-likeness or detection | Yes Built-in AI-likeness estimate with per-sentence highlights. An estimate, not proof of authorship. | Yes "Human-Score" detector; the enhanced scan shows which sentences pull the score down.4 |
| Facts and citations kept | Yes Integrity check for facts, numbers and citations, plus a fact-check pass when needed. | Partly Its support guide asks you to check names, numbers and citations after each rewrite. Fact-checking is part of Stealth Agent.17 |
| Document import and export | Import .txt, photos and scans (on-device OCR), Google Docs and web links; PDF and Word on Pro. Export .txt, .docx, .pdf. | Partly Upload .doc and .txt on Pro; .pdf and images on Max. Export formats not named.38 |
| Languages | App in English, German, Spanish and French. | Pricing table lists 100+ languages; the iOS app is in English.35 |
| Privacy and data retention | Processed in the EU (Firebase europe-west1) and by Replicate (Anthropic Claude) only to produce results. Results kept 30 days; uploads deleted after extraction. No ads.12 | Says it never shares your content with detectors or third parties. Hosted in the US; personal data may be kept up to 3 months after an account closes.3910 |
| Notable claims | Doesn't promise undetectable text or a pass on any detector or exam. | Its pricing page says "We beat every AI Detector", and its terms add a "Detected? Get your money back" policy. We haven't tested these claims.39 |
- Yes listed by the provider
- Partly some of it, or only on some plans
- No the provider says it isn't offered
- Not stated not in the sources we checked
Where StealthGPT is stronger
StealthGPT does more, in more places.
-
Browser, Chrome and integrations
StealthGPT runs on the web, in Chrome and on iPhone and iPad, and lists an API, MCP, Zapier and WordPress.125 HumanGPT's web editor isn't live yet.
-
A much wider suite
It adds an essay writer with citations and bibliographies, a research agent, Chat with PDF and an SEO writer.18 HumanGPT sticks to rewriting your own text.
-
Room for teams and volume
Max has 200,000 words a month and 3 seats. Enterprise has 1,000,000+ words a month and 5 seats.36
-
Free scan, more languages
The detector checks 200 words without an account,4 and the pricing table lists 100+ languages.3 HumanGPT's app interface is in four languages.
Where HumanGPT is different
StealthGPT's own pages describe these differently, or not at all.
-
A free daily allowance
One free demo rewrite, then 300 words a day with no subscription.
-
3,000 words per rewrite
Pro takes up to 3,000 words at once. StealthGPT lists 1,000 (Pro), 2,000 (Max) and 10,000+ (Enterprise).6
-
Facts checked in every rewrite
Each rewrite gets an integrity check for facts, numbers and citations, plus a fact-check pass when needed.
How the rewriting differs
HumanGPT uses Anthropic Claude models with instructions based on the open-source humanizer skill and its 26 patterns from Wikipedia's "Signs of AI writing".1314 You set a tone and a strength, and on Pro voice matching can follow your own writing.
StealthGPT calls "Super" a full rewrite and "Stealth Lite" a lighter pass that removes AI tells such as stock phrases while keeping the draft close to the original.1
Example rewrite
Tone: academicSleep helps students remember what they learn. In one study, students who slept at least 7 hours scored 12% higher on recall tests (Okafor & Lin, 2019).
Fixed
- Not X but Y
- Shallow -ing add-ons
- Inflated significance
Kept
- 7 hours
- 12%
- (Okafor & Lin, 2019)
Sample text and rewrite written for this page to show typical edits. Results depend on your text and settings. We don't show StealthGPT output, because one sample can't fairly represent another tool.
Pricing compared
Per week, HumanGPT Pro is $5.99 for 50,000 words (fair use) and StealthGPT Pro is $6.99 for 12,500 words.6
HumanGPT
- Free
- $01 free demo rewrite, then 300 words a day, up to 300 per rewrite
- Pro weekly
- $5.99 / week3-day free trial. 50,000 words a week (fair use), up to 3,000 per rewrite
- Pro yearly
- $39.99 / yearSame Pro limits
US prices.11
StealthGPT
- Intro offer
- $1 / 3 daysNew users, Pro or Max
- Pro
- $6.99 / week12,500 words a week. $29.99 a month or $299.99 a year: 50,000 words a month
- Max
- $19.99 / week50,000 words a week, 3 seats. $49.99 a month or $499.99 a year: 200,000 words a month
- Enterprise
- $179.99 / month1,000,000+ words a month, 5 seats. $1,799.99 a year
Web prices from StealthGPT's pricing article; its pricing page shows yearly plans as monthly amounts.6
Prices in US dollars as listed in October 2026, before tax. Prices in your country may differ, and either provider can change them at any time.
StealthGPT's iOS app has separate in-app prices, such as Pro Weekly at $5.99, with no word allowances stated.5
Questions about HumanGPT and StealthGPT
Is HumanGPT an alternative to StealthGPT?
Yes, if you mainly rewrite your own drafts on an iPhone. HumanGPT has a free daily allowance, longer rewrites on Pro and a fact and citation check. For essays with citations, research help or a browser extension, StealthGPT covers more.
Is StealthGPT free, and how does it compare on price?
StealthGPT's pricing page lists no free plan, though its detector page mentions free accounts. New users can try Pro or Max for $1 for 3 days; Pro then costs $6.99 a week for 12,500 words. HumanGPT is free for 300 words a day, and Pro is $5.99 a week with a 3-day free trial or $39.99 a year in the US. Check both before you subscribe.
Will HumanGPT stop a detector from flagging my text?
No. No tool can promise how a detector, a teacher or an editor will judge a text, and HumanGPT doesn't claim to. StealthGPT makes detector claims and offers a money-back policy; we haven't tested those claims. HumanGPT's AI-likeness estimate is a guide for editing. Follow the rules of your school or workplace.
Where is my text processed?
HumanGPT processes text in the EU (Firebase, europe-west1) and with Replicate (Anthropic Claude) only to produce your result, and deletes result copies after 30 days. Uploads are deleted after extraction. StealthGPT's terms say its site is hosted in the United States and user data is transferred there.
Sources
All sources were last checked in October 2026. Some StealthGPT pages opened in German for us because of a language redirect, so facts from those pages are our translation.
- StealthGPT home page (opens in a new tab)
- StealthGPT, Chrome Web Store listing (opens in a new tab)
- StealthGPT pricing (opens in a new tab)
- StealthGPT free AI detector (opens in a new tab)
- Stealth AI - Study Companion on the App Store (seller XYZ AI, Inc.) (opens in a new tab)
- StealthGPT support: Current plans and pricing (updated 29 Aug 2026) (opens in a new tab)
- StealthGPT support: Humanize your first document (opens in a new tab)
- StealthGPT support: Getting started with StealthGPT (opens in a new tab)
- StealthGPT terms (last updated 08/27/26) (opens in a new tab)
- StealthGPT privacy policy (opens in a new tab)
- HumanGPT pricing
- HumanGPT privacy policy
- humanizer, an open-source skill by Siqi Chen (MIT License) (opens in a new tab)
- Wikipedia: Signs of AI writing (opens in a new tab)
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Try HumanGPT on your next draft
Paste a paragraph, pick a tone and check the AI-likeness estimate. Your first rewrite is free.
For iPhone with iOS 17 or later.