stealthwriter is one of the newer "ai humanizer" tools. paste in ai-generated text, click a button, get back text that's supposed to pass detectors. similar pitch to undetectable ai.

it's not bad. but it's limited.

what stealthwriter does

you paste text. you pick a mode (ninja or ghost, yeah really). it rewrites the text to reduce ai detection scores. there's a built-in detector check so you can see before and after.

the rewriting quality is decent for a humanizer tool. better than basic paraphrasers. it does change sentence structure to some degree, not just words.

the single-purpose limitation

stealthwriter is a humanizer. that's the whole product. you still need chatgpt or something else to generate the content. then you paste it into stealthwriter. then you paste the result into google docs or wherever you're actually writing.

that's three tools and a lot of copy-pasting. and you have zero control over the writing process. you get what chatgpt gives you, filtered through what stealthwriter gives you. your voice isn't in there anywhere.

the quality gap

stealthwriter's rewriting is better than quillbot-tier synonym swapping. but it still has a "processed" feel. the text reads like it went through a machine. because it did.

the sentences are grammatically fine. the meaning is preserved. but something's off. the rhythm feels manufactured. the word choices feel slightly wrong. people might not flag it as ai but they won't think it's great writing either.

paraai's paraphrase is built on fine-tuned models trained on real human-text corpora. the output doesn't just pass detectors — it reads well. natural rhythm, real variation, actual voice. the difference is noticeable when you read both side by side.

the workflow difference

with stealthwriter: generate elsewhere → paste → humanize → paste somewhere else → edit.

with paraai: cowrite generates your draft → quill lets you edit with ai help → paraphrase rewrites into natural text. everything in one place. your input shapes the output at every step.

that's the difference between a humanizer and a writing workspace. one processes text after the fact. the other involves you in the writing from start to finish.

detection scores

both tools bring scores down. stealthwriter usually gets text into the 10-20% range on originality.ai. paraai consistently gets under 10%.

but the bigger difference is readability. low detector scores don't matter if the text sounds weird to an actual human reading it. paraai's untraceable ai output sounds natural because the models learned from natural writing. stealthwriter's output sounds processed because it's processing, not rewriting.

the pick

stealthwriter if you just need a quick humanizer and don't mind the workflow hassle. paraai if you want the whole writing process in one tool with better output quality. we're biased obviously. but the output speaks for itself.