Alternatives
The best StealthGPT alternatives for non-native English writers
By ESL Humanizer editorial team · Prices and limits checked September 2026
Short answer
The best StealthGPT alternative depends on why you're switching. If you wrote the text yourself and want it to sound natural without changing your meaning, ESL Humanizer is built for that. Undetectable AI is a good fit if you're rewriting marketing copy that an AI drafted and detector scores matter to you; WriteHuman is a good fit if you're working with AI-generated text and specifically care about one detector's score.
Why people look for a StealthGPT alternative
- Students don't want to depend on a tool built to hide AI use
- Rewrites can change meaning
- Detector updates can undo “undetectable” results
StealthGPT and its alternatives compared
Details come from each tool’s own website in September 2026 and can change. ESL Humanizer is our product, so its row sticks to verifiable facts.
| Tool | Built for | Free option | Paid from |
|---|---|---|---|
| ESL Humanizer | Polishing English you wrote yourself | 1 rewrite a day (2 when signed in), up to 1,500 characters (~250 words) each | $24.95/month or $89 for 4 months |
| Undetectable AI | Rewriting AI-generated text | 250-word trial | $5/month billed yearly (10,000 words) |
| WriteHuman | Rewriting AI-generated text | 3 requests a month, 250 words each | $20/month or $12/month billed yearly |
| HumanFlow | Making AI-assisted drafts read naturally; AI-likelihood scoring | 2,000 words a month to humanize, 10,000 to detect, 1,500 words per scan | $18/month (Writer); 40% off yearly |
| QuillBot | General paraphrasing, grammar and summarizing | Paraphraser up to 125 words per run | $19.95/month or $8.33/month billed yearly |
| StealthGPT (for reference) | Generating and rewriting “undetectable” AI text | Very limited free use | Several tiers — see its pricing page |
The alternatives, one by one
1. ESL Humanizer — for English you wrote yourself
ESL Humanizer rewrites a non-native writer’s own paragraph so it reads naturally, then shows every change word by word with a meaning score and an AI-detection estimate. It doesn’t generate content and never promises to beat detectors.
- ESL Humanizer doesn't generate content — it only edits what you wrote.
- Every change is visible and the meaning is scored.
- Detection is shown as an honest estimate, not a promise.
2. Undetectable AI — rewriting AI-generated text
An AI humanizer that rewrites AI-generated text and markets high “human” scores on major detectors.
- Choose it if you're rewriting marketing copy that an AI drafted and detector scores matter to you
- Watch out for: designed around AI-generated input, not a non-native writer's draft
- Free option: 250-word trial
3. WriteHuman — rewriting AI-generated text
A dedicated AI humanizer that tunes its model against specific detectors.
- Choose it if you're working with AI-generated text and specifically care about one detector's score
- Watch out for: very small free tier
- Free option: 3 requests a month, 250 words each
4. HumanFlow — making AI-assisted drafts read naturally; AI-likelihood scoring
An AI humanizer and detector that rewrites AI-generated drafts to sound natural and scores text for AI likelihood.
- Choose it if you start from an AI draft and want it to read naturally
- Watch out for: built around AI-generated drafts rather than your own writing
- Free option: 2,000 words a month to humanize, 10,000 to detect, 1,500 words per scan
5. QuillBot — general paraphrasing, grammar and summarizing
A paraphrasing suite with several rewrite modes, a grammar checker, a summarizer and a humanizer.
- Choose it if you need a summarizer, citation tool and paraphraser in one subscription
- Watch out for: the free paraphraser stops at 125 words per run
- Free option: Paraphraser up to 125 words per run
When sticking with StealthGPT makes sense
- You're producing AI-generated content where detection matters and policies allow it
If you’re switching because you wrote the work yourself and were worried about a detector, you don’t need a disguise tool. Read how to avoid false AI flags — natural English and a visible writing process protect you better than any rewrite.
Wrote it yourself? Make it sound natural.
Paste a paragraph. ESL Humanizer fixes non-native phrasing, keeps your meaning and highlights every change — free for up to ~250 words.
Quick answers
Is StealthGPT safe to use for school?
Using any tool to disguise AI-written work as your own breaks most academic integrity policies. If you wrote the work, you don't need to hide anything — focus on making the English natural and keep your drafts.