StealthWriter AI
StealthWriter rewrites AI text to read naturally and bundles its own detector. The sentence editor is genuinely good, but strict checkers like Copyleaks still flag the output as AI.
A clean rewriter with a genuinely useful sentence editor, but it failed the one job that matters: our humanized text still scored 100% AI on an independent detector.
Should you use StealthWriter?
Writers cleaning up AI drafts for readability who want line-by-line control over phrasing, not a guaranteed way past an institutional detector.
You need to pass Copyleaks, Turnitin or Originality . Our humanized paragraph came back 100% AI on Copyleaks despite a green self-score.
Free covers light use. Real volume jumps to Starter at $20/mo , and heavy daily use climbs steeply from there to $400.
The tool grades its own output on the weaker V1 scanner while flagging your input with the newer V2. It is marking its own homework.
What is StealthWriter?
Start with what StealthWriter will and will not do, because the gap decides whether it is worth your time. It rewrites AI-generated text to read more naturally and bundles its own AI detector so you can scan before and after. On readability it delivers: rewrites come back clean, fast and with the meaning intact. On the harder promise, slipping past the detectors other people run, the results are shaky, and against the strict checkers universities and publishers use it often fails outright.
It is a browser tool aimed at writers, marketers and students who draft with ChatGPT, Claude or Gemini and want the output to sound less machine-made. The rewrite engine is called Ghost, offered in Mini, Pro and Legacy variants with rewrite intensity from level 1 to 8, and the built-in detector ships in two versions, V1 and V2. That last detail matters more than it sounds, because which scanner grades your text changes whether it passes.
Key features & how they perform
Each feature rated from hands-on testing and aggregated review sentiment.
Sentence-level rewrites
Click any line to open an alternatives panel with several distinct rephrasings and a button to generate more, giving real editorial control.
Rewrite levels 1 to 8
Dial intensity from light touch-ups to an aggressive level 8 rework, across Ghost Mini, Pro and Legacy engine variants.
Fast processing
Humanized text returns in under ten seconds even on the heaviest setting, one of the tool's most consistent strengths.
Built-in AI detector
V1, V2 and a Deep Scan flag AI sentences, but the two engines disagree and the pass often comes only from the weaker one.
Detector bypass
Clears lenient checkers like ZeroGPT, but strict ones such as Copyleaks, Turnitin and Originality still catch the rewrite.
Readable output
Rewrites keep meaning and grammar mostly intact, though aggressive settings can swap in phrasing that shifts the original sense.
Feature ratings blended from GPTZero, Reddit humanizer threads & independent 2026 detector tests + hands-on testing.
Running one AI paragraph through StealthWriter's whole pipeline
One control passage, scanned, humanized, self-checked, then taken to a detector StealthWriter does not own.
The setup, and the baseline scan
To test this properly we skipped the marketing claims and ran a single control paragraph through the whole free pipeline: a 142-word piece on how remote work reshaped American office culture, generated by a standard AI model and never touched by hand.
Using the same passage at every step means each score is comparable to the others, which is the only way a humanizer review holds up.
Before humanizing anything, we pasted the raw AI paragraph into StealthWriter's own detector on Ghost 5.2 Mini at Level 8, the heaviest rewrite setting, and scanned it with the V2 engine.
The humanize pass and a scanner sleight of hand
We ran the same paragraph through the humanizer at Level 8. The output stayed readable and kept the meaning intact, with only light changes such as "weakened the spontaneous interactions" in place of the original wording.
Then StealthWriter scanned its own result and returned 70% human with a green Looks Human badge. Look closely at the scanner toggle before you trust it.
The real test: an independent detector
A self-scan means little. The point of a humanizer is to pass detectors the writer does not control, so we took the humanized output straight to Copyleaks, one of the detectors US universities and publishers actually use.
The result was blunt.
Where the tool earns its keep
The one feature we came away impressed by was sentence-level rewriting. Clicking any sentence opens a Choose alternative panel with several distinct rewrites and a button to generate fresh ones.
For a sentence about heading out for a run, it offered three genuinely different phrasings rather than minor word swaps.
Living with the free tier
The free plan caps input at 1,000 words. We pasted a 1,278-word draft and got a hard stop telling us to shorten it, with no partial processing offered.
Daily humanizations and scans are both limited too, with a counter that resets at 5:30 AM. For contrast, here is a genuinely human-written passage through the same V2 scanner.
StealthWriter pricing
Figures taken from the official StealthWriter pricing page. Annual billing is ten times the monthly rate.
| Plan | Price | What's included |
|---|---|---|
| Free | $0 | 10 humanizations/day · 10 AI scans/day · 1,000 words per input · V1 & V2 detector · Ghost 5.2 Mini |
| Starter | $20 /mo | 50 humanizations/day · 50 scans/day · 5,000 words per input · Ghost 5.2 Pro & Legacy · fast response |
| Plus Popular | $50 /mo | 150 humanizations/day · 150 scans/day · 5,000 words per input · all Ghost models · priority support |
| Pro | $100 /mo | 350 humanizations/day · 350 scans/day · 5,000 words per input · fastest response · all Ghost models |
| Business | $200 /mo | 800 humanizations/day · 800 scans/day · 5,000 words per input · priority team support |
| Scale | $400 /mo | 2,000 humanizations/day · 2,000 scans/day · 5,000 words per input · maximum self-serve volume |
Pros & cons
Specific conclusions from testing and real user reviews, not generic filler.
✅ Pros
- Click-any-sentence editor offers several distinct rewrites per line
- Rewrites return in under ten seconds even at level 8
- Output stays readable with grammar and meaning mostly intact
- Clears lenient detectors like ZeroGPT reliably
- Rewrite intensity spans eight levels across three Ghost engines
- Company states submitted text is not stored or used for training
⛔ Cons
- Fails strict detectors: Copyleaks, Turnitin and Originality catch the rewrite
- Self-score passes on V1 while V2 flags the same text
- Aggressive rewrites introduce errors that shift the original meaning
- Every alternative still carries the tool's own red AI marker
- Input hard-capped at 5,000 words even on the top plan
- No batch processing for longer documents
- Reddit humanizer threads rank rivals higher on structural rewriting
Synthesized from real reviews on GPTZero, Reddit humanizer threads & independent 2026 detector tests · paraphrased, not quoted
StealthWriter scorecard
Rated against what an AI humanizer is actually built to do.
| Dimension | Verdict | Score |
|---|---|---|
| Sentence-level control Line-by-line rewrite alternatives | Good |
8.0
|
| Processing speed Time to return a rewrite | Good |
8.0
|
| Ease of use Interface, workflow, clarity | Good |
8.0
|
| Readability & meaning retention How natural the output reads | Good |
7.5
|
| Rewrite variety & quality Distinctness of alternatives | Average |
6.5
|
| Meaning-preservation reliability Errors at aggressive settings | Average |
6.0
|
| Value for money Plan pricing vs rivals | Average |
5.5
|
| Free tier usefulness Word cap and daily limits | Weak |
5.0
|
| Built-in detector honesty V1 vs V2 grading gap | Weak |
4.0
|
| Detection bypass (independent) Passing detectors you do not own | Weak |
3.5
|
| Scrutool Score Equal-weight average of all 10 dimensions |
6.2
|
What users say about StealthWriter
The themes reviewers raise most often, by share of analysed reviews.
% = share of analysed reviews mentioning each theme (GPTZero, Reddit humanizer threads, independent detector tests)
A capable rewriter that quietly grades itself on the easy exam
As an editor, StealthWriter is better than its results suggest. The sentence-level rewrite panel is the best part of the product, giving you distinct alternatives per line and real control over tone, the rewrites are fast and readable, and meaning mostly survives at lighter settings. The trouble is the promise on the label. Our humanized paragraph scored a green 70% human on the tool's own V1 scanner and 100% AI on Copyleaks moments later, and the pattern repeats against Turnitin and Originality across independent tests. Choosing the weaker V1 engine to grade its own output is the detail that defines it. Writers who want to smooth an AI draft they will read and edit themselves will get value here. Anyone relying on it to clear an institutional detector should not, because on the test that counts it did not pass.
Discussion
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