Alternatives
The best Undetectable AI alternatives for non-native English writers
By ESL Humanizer editorial team · Prices and limits checked September 2026
Short answer
The best Undetectable AI 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; QuillBot is a good fit if you need a summarizer, citation tool and paraphraser in one subscription.
Why people look for a Undetectable AI alternative
- Using a disguise tool on schoolwork can itself look like misconduct
- Rewrites may change meaning without telling you
- Detector results aren't guaranteed and vary between tools
Undetectable AI 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 |
| 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 | Humanizing AI-generated text | 10 humanizations and 10 scans a day, 1,000 words per input | $20/month (Starter) up to $400/month |
| Undetectable AI (for reference) | Rewriting AI-generated text | 250-word trial | $5/month billed yearly (10,000 words) |
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 never promises to beat detectors — it shows an estimate and leaves you in control.
- You see every change word by word and a meaning score.
- Built for work you wrote, which you can defend if questioned.
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. 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
4. 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
5. StealthWriter — humanizing AI-generated text
An AI humanizer with its own detector, sold with daily humanization allowances.
- Choose it if you're humanizing AI drafts in bulk
- Watch out for: designed for AI-generated input
- Free option: 10 humanizations and 10 scans a day, 1,000 words per input
When sticking with Undetectable AI makes sense
- You're rewriting marketing copy that an AI drafted and detector scores matter to you
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 using Undetectable AI cheating?
Submitting AI-generated work as your own breaks most academic integrity policies, whatever tool you use afterwards. Editing your own writing for clarity is generally treated differently — check your institution's rules.
What's the best Undetectable AI alternative for ESL students?
If you wrote the work yourself, pick a tool that edits your own text, shows every change and doesn't promise to beat detectors — that way the result is still your work.