StealthWriter

An entry in the Humanizer Wiki directory of AI humanizers.

Strengths

Named operator (AiVantage LLC)
Sentence-level highlights with selectable rewrite alternatives
Light, medium, and aggressive rewrite modes

Limitations

Paid word credits reportedly expire monthly if unused
Entry paid tier ($20/mo) is relatively expensive
"Stays ahead of detectors" positioning is a marketing claim, not verified by us

Overview

StealthWriter (stealthwriter.ai), a service of AiVantage LLC, is a freemium AI humanizer that rewrites AI-generated content and provides a built-in AI detector. Its distinguishing feature is a sentence-level workflow: output is color-coded by flag risk, and users can click a sentence to pick from alternative rewrites, alongside light/medium/aggressive intensity modes. Note the similarly named but separate products StealthGPT and Stealthly, which are unrelated.

Claims and pricing

StealthWriter is marketed as producing text that “reads naturally human” and avoids plagiarism flags by generating original rewrites, with the vendor emphasizing continuous updates to “stay ahead” of evolving AI detectors (no specific detector names are highlighted on its homepage). Those are vendor claims, not established facts; detector performance is content- and settings-dependent and shifts as detectors update. We do not assert any bypass rate as fact.

On pricing, StealthWriter offers a free plan (around 10 daily humanizations, ~1,000-word limit). Reported paid tiers include Starter at about $20/mo, Plus around $50/mo, Pro around $100/mo, and a Scale tier around $400/mo, differing mainly in daily humanization allowances. Reviews note that unused monthly credits expire. Confirm current numbers on the StealthWriter site.

Summary

StealthWriter is a freemium humanizer from a named operator, distinguished by sentence-level rewrite controls. Its “stays ahead of detectors” and “reads naturally human” claims are vendor marketing and remain unverified pending our own testing.