Alternatives
The best StealthWriter alternatives for non-native English writers
By ESL Humanizer editorial team · Prices and limits checked September 2026
Short answer
The best StealthWriter 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. HumanFlow is a good fit if you start from an AI draft and want it to read naturally; Undetectable AI is a good fit if you're rewriting marketing copy that an AI drafted and detector scores matter to you.
Why people look for a StealthWriter alternative
- People want tools they can openly use for coursework
- Rewrites aren't checked for meaning
- Its detector disagrees with the ones schools use
StealthWriter 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 |
| 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 |
| Undetectable AI | Rewriting AI-generated text | 250-word trial | $5/month billed yearly (10,000 words) |
| QuillBot | General paraphrasing, grammar and summarizing | Paraphraser up to 125 words per run | $19.95/month or $8.33/month billed yearly |
| Grammarly | Correcting grammar and tone as you write; its humanizer rewrites AI-generated text | Grammar and spelling checks, 100 AI prompts a month, basic free humanizer | Pro from $12/month |
| StealthWriter (for reference) | Humanizing AI-generated text | 10 humanizations and 10 scans a day, 1,000 words per input | $20/month (Starter) up to $400/month |
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 fixes non-native phrasing in text you wrote.
- A word-by-word diff and meaning score on every rewrite.
- Never claims to make text undetectable.
2. 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
3. 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
4. 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
5. Grammarly — correcting grammar and tone as you write; its humanizer rewrites AI-generated text
A grammar and writing assistant that also offers a free AI humanizer for rewriting AI-generated drafts.
- Choose it if you want real-time grammar help in email, Docs and every browser field
- Watch out for: its humanizer is designed for AI-generated text, not for a non-native writer's own draft
- Free option: Grammar and spelling checks, 100 AI prompts a month, basic free humanizer
When sticking with StealthWriter makes sense
- You're humanizing AI drafts in bulk
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 StealthWriter free?
StealthWriter's free plan includes 10 humanizations and 10 AI scans a day with inputs of up to 1,000 words. Paid plans start at $20 a month.