Clever AI Humanizer vs StealthWriter
Clever AI Humanizer
cleverhumanizer.aiStealthWriter
stealthwriter.aiSide by side
| Figure | Clever AI Humanizer | StealthWriter |
|---|---|---|
| Price from | Free | $20/mo |
| Free plan | Yes | Yes |
| Free trial | — | — |
| Open source | — | — |
| Web | Yes | Yes |
| iOS | — | Yes |
| Android | — | Yes |
| API | Yes | — |
| Plans published | 1 | 7 |
| Spec score · AI Paraphrasing Tools | 8.7 (#4) | 8.5 (#6) |
| Audience | The site describes use cases for writers, bloggers, content creators, marketers, PR and social media teams, business professionals, SEO writers, job seekers, and freelancers. | The About page identifies writers, marketers, and professionals seeking clearer, more natural AI-assisted drafts as its intended users. |
| Headquarters | New Castle, Delaware, USA | Sheridan, Wyoming, United States |
| Languages | The service states that it supports English, Spanish and Portuguese. | The FAQ lists Spanish, French, German, Italian, Portuguese, and Dutch among supported languages. |
| Purpose | The humanizer rewrites AI-assisted drafts to improve tone, sentence structure, clarity, and readability while preserving meaning. | StealthWriter rewrites AI-generated or AI-assisted text to improve phrasing, flow, and clarity, and includes AI detection features. |
| Rating on Trustpilot | 2.8 out of 5 from 8 reviews. | 3.5 out of 5 from 74 reviews. |
| Security | The privacy policy describes encryption in transit and at rest where applicable, access controls, monitoring, and staff confidentiality obligations. | The privacy policy lists TLS/SSL encryption in transit and at rest, regular security assessments and vulnerability testing, access controls, and employee data protection training. |
| Support | The privacy policy lists [email protected] for privacy questions and requests. | Support is available at [email protected] and +1 (307) 998-3768 Monday through Friday, 9:00 AM–5:00 PM Mountain Time; the contact page says it typically responds within 24 business hours. |
| What it does | Clever AI Humanizer rewrites submitted AI-assisted text to improve tone, clarity, readability, rhythm and voice while aiming to preserve meaning. | StealthWriter rewrites AI-assisted text for more natural phrasing and includes an AI detector. |
Plans
StealthWriter
- FreeFree
- Starter$20 a month
- Plus$50 a month
- Pro$100 a month
- Business$200 a month
- Scale$400 a month
- EnterprisePriced on request
In their own words
Clever AI Humanizer
Clever AI Humanizer is a web-based tool for revising AI-assisted drafts, with controls for tone and length. Its Normal and Clear & Structured styles suit different kinds of writing, and the site lists English, Spanish, and Portuguese support. A free plan costs nothing, has no fixed monthly word allowance, and permits up to 3,000 words per request, subject to service availability. A free account stores results in content history. The site also offers an AI Detector, AI Paraphraser, and Grammar Checker; its free detector and humanizer widgets can be embedded on websites using a script or iframe and have light, dark, or automatic themes. The maker says those widgets work with WordPress, Webflow, Ghost, and plain HTML. Submitted text is sent to external AI and LLM providers for processing; the privacy policy says it is not used to train or fine-tune models and is kept, along with outputs, for 30 days. The service advises against submitting confidential or special-category personal data. Users must be at least 18, and public API access is listed as coming soon with a waitlist.
StealthWriter
StealthWriter rewrites AI-generated or AI-assisted text to improve phrasing, flow, and clarity, and includes an AI detector. Its humanizer provides light, medium, and aggressive rewrite levels. The detector estimates whether submitted text may be flagged as AI-generated and gives overall and sentence-level feedback. It accepts text from tools such as ChatGPT, Claude, Gemini, Llama, Mistral, Copilot, and Jasper; listed supported languages include Spanish, French, German, Italian, Portuguese, and Dutch. StealthWriter runs in modern browsers on desktop, tablet, and mobile, with Android, iOS, and web listed as platforms. The free plan allows 10 humanizations and 10 AI scans daily, up to 1,000 words per input, and includes Ghost 5.2 Mini. Paid plans start at $20 a month and allow up to 5,000 words per input, with Ghost 5.2 Pro and Ghost Legacy also included. The public detector demo has a 500-word scan limit and daily limits. The maker advises reviewing rewritten text because a rewrite can alter details or how a claim is expressed.