Comparison
ESL Humanizer vs LanguageTool: which is better for non-native English writers?
By ESL Humanizer editorial team · Prices and limits checked September 2026
Short answer
LanguageTool is one of the best free grammar checkers for people who write in several languages. It corrects errors; ESL Humanizer rewrites whole paragraphs so correct-but-unnatural English reads like a fluent writer wrote it.
LanguageTool is a multilingual grammar, style and spelling checker with an AI paraphraser. 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; LanguageTool’s details come from its own website and can change — check before you pay.
At a glance
| ESL Humanizer | LanguageTool | |
|---|---|---|
| Type | ESL writing editor | Grammar & writing assistant |
| Built for | Polishing English you wrote yourself | Grammar and style checking in 30+ languages |
| On AI detectors | Shows an estimate, never a guarantee | Doesn't market anything about AI detectors |
| Shows each change | Yes — word by word, plus a meaning score | Yes — suggestions are underlined in your text |
| Free option | 1 rewrite a day (2 when signed in), up to 1,500 characters (~250 words) each | Up to 2,000 characters per check, 3 paraphrases a day |
| Paid from | $24.95/month or $89 for 4 months | Premium — see its pricing page (shown at checkout) |
What LanguageTool does well
- Checks 30+ languages, handy if English isn't your only working language
- Generous free limit of 2,000 characters per check
- 14-day money-back guarantee on Premium
Where LanguageTool falls short for non-native writers
- Error correction won't fix sentences that are grammatical but sound translated
- Only 3 free paraphrases a day
- No meaning score or AI-detection view
What ESL Humanizer does differently
- ESL Humanizer targets naturalness, not just errors — the thing detectors and readers notice in second-language writing.
- Each rewrite shows a meaning score and a word-by-word diff.
- Includes an AI-detection estimate for the rewritten text.
Which should you choose?
Choose LanguageTool if…
- You write in German, Spanish, French or other languages as well as English
- You want a free checker for error spotting in long documents
Choose ESL Humanizer if…
- Your text is already correct but reads as non-native
- You need to see how natural phrasing changes your AI-detection estimate
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 LanguageTool better than Grammarly for non-native speakers?
LanguageTool is stronger if you write in several languages and has a generous free limit; Grammarly has more polished integrations. Neither is designed to make correct but non-native phrasing sound natural — that's where a rewriting tool helps.
How much text can LanguageTool check for free?
Up to 2,000 characters per text field on the free plan; Premium raises that to 150,000 characters.