StealthWriter
AI humanizer with per-sentence detection scores and rewrite levels.
About
StealthWriter (stealthwriter.ai), from AiVantage LLC, is an AI humanizer that rewrites AI-generated text to reduce detection scores. Its distinguishing feature is per-sentence feedback: each sentence gets alternative rewrites alongside its own detection score, plus a built-in detector for before-and-after comparison. Rewrite intensity runs from Light to Medium to Aggressive, and the tool is web-only and English-only.
Pricing runs from a free tier to Basic at $20/month and Premium at $50/month. Independent 2026 testing puts it in the middle tier, around 53 to 60 percent average bypass, performing decently on GPTZero and Winston but poorly on Turnitin and Originality.ai in rigorous tests. Its published privacy posture is relatively strong: processed text is not stored or used for training, and its terms prohibit academic misconduct.
What it can do
- Light, Medium, and Aggressive rewrite levels
- Per-sentence alternative rewrites with detection scores
- Built-in AI detector for before/after comparison
- Free tier with daily word allowance
- Strong no-storage privacy posture
Setup
Use free at stealthwriter.ai; no install needed.
Prerequisites
Nothing for the free tier; paid plan for higher word limits.
Use cases
Works with
Trust score — 7/10
Scored 7/10 (metrics tier, metrics-v1). Evidence: Verified via vendor site/docs/GitHub and reputable coverage, wave 92; Trending score 66/100 from researcher assessment.
Sources
Every fact above was checked against these sources. Where a claim comes from the provider and couldn't be independently verified, the text says so.