Head-to-head
Grammarly vs LanguageTool: which one in 2026?
Grammarly and LanguageTool are both writing assistants that check spelling, grammar and style inside browsers and word processors. Grammarly centers on English, with generative AI prompts and plagiarism checks in its Pro plan, while LanguageTool is a multilingual checker covering more than 30 languages and dialects beyond its six best-supported ones.
Verdict
Grammarly is the better pick for English-language teams that want one product covering corrections, rewrites, generative drafting and plagiarism checks, with enterprise controls behind it. LanguageTool is the better pick for anyone writing outside English or across several languages, since coverage is its main design goal and the free plan includes all of them. LanguageTool's AI is narrower, so it replaces a checker, not an AI writing assistant.
Grammarly and LanguageTool side by side
| Grammarly | LanguageTool | |
|---|---|---|
| Price entry | Pro at 12 euros per member per month | Quoted |
| Language coverage | The pricing page frames Pro around writing fluently in English, and its feature list does not advertise checking in other languages. | Its site names English, German, Portuguese, Spanish, French and Dutch, plus more than 30 other languages and dialects, with automatic language detection. |
| Free plan | Free covers spelling and grammar corrections, a read of your writing tone, and 100 generative AI prompts per month. | Basic limits each text field to 2,000 characters and gives three AI sentence rephrasings per day, but includes all languages and dialects. |
| Paid plan | Pro showed 12 euros on our fetch, with a free trial. It adds full-sentence rewrites, tone adjustment, plagiarism and AI-text detection, and 2,000 prompts. | Premium lifts the field limit to 150,000 characters, adds unlimited AI paraphrasing, a style guide and Picky Mode. Prices load by script, so none was readable. |
| Team features | Pro includes a style guide, brand tones and team analytics; Enterprise adds SSO, SCIM, audit logs, data loss prevention and customer-managed encryption keys. | A Teams plan offers user management, a shared style guide and team dictionary, with seat count chosen in a selector on the premium page. |
| Generative AI | Pro includes 2,000 AI prompts per member per month for drafting text, and Enterprise lists unlimited prompts. | AI is limited to sentence paraphrasing: three a day on Basic and unlimited on Premium, with no drafting prompts listed. |
| Where your text goes | Says it hosts data in AWS data centers in the US East region, encrypting it in transit with TLS 1.2 and at rest with AES-256. | Its privacy policy names offices in the United States, India, the Netherlands, Germany and Canada, and says service providers operate worldwide. No hosting region was stated. |
| Training on your text | States it never lets third parties use uploaded content to train their models, and points to separate product-improvement and training controls. | Its policy says inputs from Individual and Team plan users are not used to train its language models, by default and without opting out. |
| Certifications stated | Security page lists SOC 2 Type 2, SOC 3, ISO 27001, 27017, 27018, 27701 and 42001. | The pages we read name a GDPR-oriented business offering but no SOC 2 or ISO certificate; the vendor's certifications were not checked beyond them. |
Where each one wins
Grammarly wins on
- Generative AI drafting prompts, plagiarism detection and tone rewrites are all bundled into one Pro plan
- Publishes a long list of certifications, including SOC 2 Type 2 and several ISO standards
- Enterprise tier adds SSO, SCIM, audit logs and customer-managed encryption keys
LanguageTool wins on
- Checks text in more than 30 languages and dialects beyond its six main ones
- The free plan includes every supported language, with 2,000 characters per text field
- States that user inputs are not used to train its models, with no opt-out needed
Which to pick
Pick Grammarly if
You write mostly in English at work, want AI drafting and plagiarism checks in the same tool, and need SSO or certifications your security team will ask for.
Pick LanguageTool if
You write in German, French, Dutch, Spanish or several languages, want a plain checker without a drafting assistant, or care that your text is not used for model training.
Each tool in context: Grammarly profile, LanguageTool, and the full Best AI Writing Tools in 2026.
Frequently asked questions
Is LanguageTool as good as Grammarly for English?
Both check spelling, grammar and style in English, and LanguageTool lists thousands of extra English rules on Premium. Neither vendor publishes a benchmark we could verify. Grammarly adds tone rewrites and AI drafting on top of corrections, so the gap is mostly in features, not in basic error catching. Run both on your own documents.
Which one is better for writing in German or French?
LanguageTool, by design. It names German and French among its six main languages with more than 30 others, and detects the language automatically. Grammarly's pricing page describes Pro as helping you write fluently in English and does not advertise other languages, so a bilingual writer would likely need a second tool.
Do Grammarly and LanguageTool use my writing to train AI?
LanguageTool's policy says inputs from Individual and Team plan users are not used to train its models, without any opt-out. Grammarly says it never allows third parties to train their models on your content and refers to separate product-improvement and training controls. Read those controls before pasting confidential text into either.
Which is cheaper, Grammarly Pro or LanguageTool Premium?
Grammarly Pro showed 12 euros on the pricing page we fetched in October 2026, with a free trial, though billing period was not stated. LanguageTool loads its prices by script, so we could not read them, but it offers a 14-day money-back guarantee. Check both pages in your own region before comparing.