Comparison
ESL Humanizer vs StealthWriter: which is better for non-native English writers?
By ESL Humanizer editorial team · Prices and limits checked September 2026
Short answer
StealthWriter has a usable free tier for humanizing AI drafts. For a non-native writer's own essay, ESL Humanizer's focus on natural phrasing, visible changes and meaning checks is the better fit.
StealthWriter is an AI humanizer with its own detector, sold with daily humanization allowances. ESL Humanizer rewrites English that non-native speakers wrote themselves so it reads naturally, without changing the meaning. ESL Humanizer is our product, so we’ve kept its row to verifiable facts; StealthWriter’s details come from its own website and can change — check before you pay.
At a glance
| ESL Humanizer | StealthWriter | |
|---|---|---|
| Type | ESL writing editor | “Undetectable” AI humanizer |
| Built for | Polishing English you wrote yourself | Humanizing AI-generated text |
| On AI detectors | Shows an estimate, never a guarantee | Positions itself as an AI humanizer with built-in detection |
| Shows each change | Yes — word by word, plus a meaning score | Not advertised |
| Free option | 1 rewrite a day (2 when signed in), up to 1,500 characters (~250 words) each | 10 humanizations and 10 scans a day, 1,000 words per input |
| Paid from | $24.95/month or $89 for 4 months | $20/month (Starter) up to $400/month |
What StealthWriter does well
- Generous free tier of 10 humanizations a day
- Up to 5,000 words per input on paid plans
- Built-in AI detector
Where StealthWriter falls short for non-native writers
- Designed for AI-generated input
- Doesn't advertise change tracking
- Scores from its own detector don't predict other detectors
What ESL Humanizer does differently
- 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.
Tools built to disguise AI text and tools that edit your own writing solve different problems. Submitting AI-written work as your own breaks most academic integrity policies whatever you use afterwards — see where the line is.
Which should you choose?
Choose StealthWriter if…
- You're humanizing AI drafts in bulk
Choose ESL Humanizer if…
- You're polishing your own essay, letter or research abstract
- You need to see and approve each edit
A note on AI detectors
No tool can guarantee how an AI detector will score your text. In a peer-reviewed Stanford study, seven detectors labeled 61% of human-written TOEFL essays as AI-generated on average, and independent tests have found detectors disagree with one another. Natural English you wrote — plus drafts that show your process — is the most reliable protection. Read more about why detectors flag ESL writing.
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.