Overview

StealthWriter is a browser-based editor for refining AI-assisted drafts, with a detector that estimates how likely text is to be flagged as AI-generated. It is most useful to writers, marketers, and other professionals who want adjustable rewriting and sentence-level feedback in one service. The combination is practical for editing, but output still needs scrutiny: changes can alter details or claims, and the service must not be used to conceal authorship or evade review.

Key features

Three rewrite strengths—light, medium, and aggressive—give users a choice between restrained edits and more substantial rephrasing. This range suits drafts that need different levels of intervention, though stronger changes call for closer checking against the original meaning.

The detector supplies an overall estimate and sentence-level feedback, which can point to passages worth revisiting. It is an estimate rather than a promise about how another detector will assess the text. The public demo allows up to 500 words per scan, recommends submitting at least 100 words, and imposes daily limits.

StealthWriter says it works with text from ChatGPT, Claude, Gemini, Llama, Mistral, Copilot, Jasper, and other tools. Its FAQ names Spanish, French, German, Italian, Portuguese, and Dutch among supported languages. Free users get the Ghost 5.2 Mini model; paid plans also include Ghost 5.2 Pro and Ghost Legacy.

Submitted text is screened by a moderation tool, then processed or rejected; the privacy policy says it is not stored or used for model training, though infrastructure providers needed to run the service may receive it. The policy also describes encryption in transit and at rest, access controls, security assessments, and compliance with GDPR and CCPA. These are useful safeguards for routine drafts, but users should consider the service's stated processing and sharing when handling sensitive material.

The service is for legitimate editing, not evasion: its acceptable-use policy bars misrepresenting authorship or bypassing AI-detection, plagiarism, academic, workplace, or platform review systems.

Pricing

StealthWriter has a capped free tier and five priced monthly plans. Free includes 10 humanizations and 10 AI scans per day, a 1,000-word input limit, and Ghost 5.2 Mini. It is a reasonable way to try the workflow, but the daily quotas and smaller input cap restrict heavier use.

Starter costs 20.00 USD per month, billed $20 USD/mo, and raises the daily allowance to 50 humanizations and 50 scans, with up to 5,000 words per input and all three model families. It suits occasional professional use; Plus at 50.00 USD per month, billed $50 USD/mo, increases both daily quotas to 150 while keeping the same input cap and models. Pro costs 100.00 USD per month, billed $100 USD/mo, for 350 of each daily operation, again with a 5,000-word input limit. The higher tiers chiefly buy greater daily throughput, not longer inputs.

Business costs 200.00 USD per month, billed $200 USD/mo, and Scale costs 400.00 USD per month, billed $400 USD/mo. Both retain the 5,000-word input cap and include priority team support; their daily limits rise to 800 and 2,000 humanizations and scans, respectively. They make more sense for sustained team or high-volume use than for an individual polishing drafts. Enterprise has custom pricing and a 5,000-word input limit. No plan provides API access.

Platforms

StealthWriter is a web app that runs in modern browsers on desktop, tablet, and mobile, with no required download or extension. Android and iOS are also listed as platforms. The absence of a public API makes it a browser-based option rather than a fit for teams seeking to integrate rewriting into their own software.

Who it's for

Choose StealthWriter if you regularly edit AI-assisted text, want control over rewrite strength, and value detector feedback alongside the editing workflow. Its free tier can suit light use, while the paid tiers fit users who need more daily operations. It is not appropriate for anyone seeking to disguise AI authorship or defeat institutional and platform checks, and it is a weaker fit for work that requires API integration.

Pros and cons

Pros: Adjustable rewrite levels and sentence-level detector feedback bring two useful editing aids together.
Pros: Paid plans support up to 5,000 words per input and add Ghost 5.2 Pro and Ghost Legacy.
Pros: The service supports several named source tools and languages, and works in mobile as well as desktop browsers.
Cons: Daily quotas cap usage even on paid plans, while the input limit stays at 5,000 words across all paid tiers.
Cons: Rewrites can change factual details or the expression of a claim, so output needs editorial review.
Cons: No public API is offered, and the acceptable-use policy rules out using the service to evade review systems.

Alternatives

For a wider comparison, browse AI Paraphrasing Tools, AI Text Humanizers, or AI writing assistants.

Sapling is another freemium option, with a free detector allowance measured in characters per check and batch files, plus API, extension, self-hosted, web, and Windows platforms. Choose it when those platforms or detector workflow are a better fit.
Clever AI Humanizer is a free web alternative with no fixed monthly word allowance and requests up to 3,000 words, subject to service availability. It may suit users who prioritize a free humanizer over StealthWriter's paid model range and detection feedback.
Phrasit is a freemium web option with a free plan capped at 150 words per run and 30 AI runs. Consider it when that smaller free-run format suits your needs.
Wordtune offers a free Basic plan with 10 rewrites and AI suggestions per day, AI generations, three monthly AI summaries, and unlimited spelling corrections and grammar checks. It is worth considering when those writing and correction tools are the priority.
QuillBot has a free paraphraser capped at 125 words and two paraphrasing modes, alongside a 1,200-word summarizer. It may suit users whose needs fit those shorter free allowances.
Rewriter AI offers API access and paid plans with monthly word quotas, including a Starter plan at 6.40 USD per month billed annually. Choose it if API access or a monthly word allowance matters more than StealthWriter's rewrite-level and detector combination.
Paraphraser.io is a freemium alternative available on Android, iOS, web, and API.
RewritePal is a freemium alternative with web, desktop, and mobile platform support.

Verdict

StealthWriter is a sensible choice for writers and marketers who want adjustable AI-assisted rewriting and detector estimates in a browser-based service. Its strongest case is the combination of rewrite controls, sentence-level feedback, and higher paid daily quotas. Look elsewhere if you need API access, higher per-input limits, or a tool to evade review: the first is unavailable, and the latter is expressly prohibited.

	StealthWriter	Writefull
Free plan	Yes	Yes
Free trial	No	No
Paid from	$20/mo	Free
Open source	No	No
Platforms	Android, iOS, Web	Web, Windows, macOS
Free plan	Yes	Yes
Included word limit	5,000 words/mo	—
Browser extension	—	Yes

StealthWriter vs Writefull

StealthWriter

Writefull