StealthWriter review: is it legit, and is it worth it?
StealthWriter is a legitimate AI humanizer with a built-in detector and a free plan: 10 humanizations and 10 scans a day, up to 1,000 words each, with no credit card. It's a sensible pick for occasional rewrites where you want control sentence by sentence. Like every humanizer, it can't guarantee what a detector will say about the result.UpdatedWhat StealthWriter is
StealthWriter (stealthwriter.ai), run by AiVantage LLC, is an AI humanizer with a built-in AI detector. It rewrites text from ChatGPT, Claude or Gemini and is aimed at writers, marketers, copywriters and researchers. Its homepage talks about natural phrasing, rhythm and flow, and it doesn't name specific detectors.It's a separate product from StealthGPT, which also generates essays and is run by a different company.How it works
You paste text, choose a rewrite level (light, medium or aggressive), and get the result back in seconds. You can click any sentence in the output to pick from alternative rewrites, which helps when one line comes out wrong. The rewriting runs on StealthWriter's Ghost models: the free plan uses Ghost 5.2 Mini, and paid plans add Ghost 5.2 Pro and older Legacy models.The detector comes in two versions, V1 and V2, plus a Deep Scan that goes sentence by sentence with color-coded highlights. You can scan up to 500 words from the homepage without an account.Is StealthWriter free?
Yes, with daily limits. The free plan gives 10 humanizations and 10 AI scans a day, up to 1,000 words per input, with no credit card; you do need to sign up. Paid plans (Starter, Plus, Pro, Business and Scale) raise the daily count from 50 to 2,000 runs and allow 5,000 words per input, and Enterprise is custom. Check stealthwriter.ai/pricing for current prices.Does StealthWriter work against AI detectors?
StealthWriter rewrites text so it reads less like a model's, and its detector shows which sentences still look machine-written. Whether another detector, such as Turnitin or GPTZero, scores the rewrite as human depends on the text and on that detector's current version. No humanizer can guarantee it, and we haven't tested StealthWriter against them.Heavier rewrite levels change more of your wording, so read the output for meaning before you use it. If your class or client bans AI-written work, a lower score doesn't change that.Where it's strong
- A usable free plan: 10 runs a day at up to 1,000 words.
- Sentence-level control, with alternative rewrites for any sentence.
- A detector with sentence highlights that you can try without an account.
- StealthWriter says it doesn't keep submitted text after processing or use it for training.
Where it falls short
- Its site lists no API or browser extension.
- Limits are per day, so a big batch has to wait or needs a higher plan.
- Aggressive rewrites change more of your wording, which raises the risk of meaning drift.
Who it's for
StealthWriter suits writers who rewrite a few AI drafts a day and like fixing sentences one at a time. Teams that need an API or plug-ins will find more elsewhere, and students should check whether their course allows AI help before using any humanizer.Leap's free humanizer, for a lighter pass
Leap's humanizer is lighter than StealthWriter's. It keeps your sentences and fixes the surface habits of AI text: stock phrases, stiff words like "leverage", em dashes, invisible characters and missing contractions. It also lists sentences that run nearly the same length as their neighbors, so you know where to vary the rhythm. It's free, runs in your browser and has no daily limit or word cap.It doesn't promise any detector result. Try it below, then check the draft with the free AI detector, which scores each sentence. For a full rewrite, Rewrite under the result is an optional paid step; your text leaves the page only if you press it.The cleanup runs in your browser and fixes common AI writing habits. It does not guarantee that the text passes any AI detector.
Verdict
StealthWriter is a legit humanizer with one of the more usable free plans and a sentence-level detector. Try the free plan on a real draft before you pay, read every rewrite, and don't expect it, or any humanizer, to settle a question your school's AI rules already answer.Frequently asked questions
Yes. It's a working AI humanizer and detector run by AiVantage LLC, with a free plan and paid plans sized by daily use. It doesn't guarantee detector results, and no humanizer honestly can.
Yes, with limits: 10 humanizations and 10 AI scans a day, up to 1,000 words each, and no credit card. Paid plans raise the daily runs and allow 5,000 words per input.
Yes, in two versions (V1 and V2), plus Deep Scan, which highlights sentence by sentence what still reads as AI. You can scan up to 500 words from the homepage without an account.
Its homepage and pricing page don't list one. The plans cover the web app, with an Enterprise option for custom volume, so ask StealthWriter directly if you need programmatic access.
It gives you more control than most: three rewrite levels and alternative versions of each sentence. Results depend on your text, so test the free plan on a real paragraph and check that the meaning survived.
They're separate products from different companies. StealthWriter is a humanizer and detector with a free daily plan. StealthGPT also writes essays and articles, sells weekly plans and markets detector evasion more openly. See the StealthGPT review.
StealthWriter says text you submit isn't stored after processing, shared or used for training. Leap's humanizer runs in your browser, and text leaves the page only if you press Rewrite.