Grammarly vs LanguageTool
Grammarly
grammarly.com
LanguageTool
languagetool.orgSide by side
| Figure | Grammarly | LanguageTool |
|---|---|---|
| Price from | $12/mo | Free |
| Free plan | Yes | Yes |
| Free trial | — | — |
| Open source | — | — |
| Windows | — | Yes |
| macOS | — | Yes |
| iOS | Yes | Yes |
| Android | Yes | — |
| Plans published | 4 | 18 |
| Spec score · Grammar checkers | 9.2 (#6) | 9.0 (#13) |
| Spec score · AI writing assistants | 9.2 (#2) | 8.9 (#10) |
| Spec score · Chrome Extensions | 8.9 (#3) | 8.7 (#4) |
| Spec score · Google Workspace Office Tools | 8.8 (#3) | 8.5 (#5) |
| Spec score · AI Grammar Checkers | 9.0 (#4) | 8.7 (#8) |
| Spec score · Proofreading Software | 9.0 (#5) | 8.7 (#10) |
| Spec score · Academic Writing Software | 9.0 (#3) | 8.6 (#8) |
| Spec score · Edge Extensions | 8.8 (#5) | 8.5 (#10) |
| Spec score · Extensions | 8.8 (#7) | 8.6 (#11) |
| Browser extension | Yes | Yes |
| Desktop app | Yes | Yes |
| Founded | 2009 | 2003 |
| Free plan | Yes | Yes |
| Languages supported | 24 | 31 |
| Mobile app | Yes | Yes |
| Style suggestions | Yes | Yes |
| Tone detection | Yes | Yes |
| Writing features | Paragraph rewrites, tone suggestions, proofreading, humanizer, and AI detector agents | Features include grammar, spelling, punctuation, casing, style, paraphrasing, and statistics. |
Plans
Grammarly
- FreeFree
- Pro$12 a month
- EnterprisePriced on request
- PlusPrice not published
LanguageTool
- BasicPrice not published
- BasicPriced on request
- Premium MonthlyPrice not published
- Premium MonthlyPriced on request
- Premium QuarterlyPrice not published
- Premium QuarterlyPriced on request
- Premium AnnualPrice not published
- Premium AnnualPriced on request
- Premium 2-YearPriced on request
- Premium 2-YearPrice not published
In their own words
Grammarly
Grammarly is a writing assistant from Grammarly, founded in 2009 and now part of Superhuman. Its listed tools include proofreading, paragraph rewrites, tone suggestions, a humanizer, and AI detector agents. Style suggestions and tone detection are listed, alongside brand voice controls and team collaboration. The Free plan is free and includes 100 AI prompts per month; Pro is $12 a month with 2,000 AI prompts per member per month. Plus is listed at ₹392 INR per member per month when billed annually, and ₹1,000 when billed monthly, and is available only via local payment methods. Grammarly lists 24 supported languages, browser compatibility with Chrome, Safari, Firefox, and Edge, and mobile apps for iPhone, iPad, and Android. Desktop apps and a browser extension are also listed. Grammarly says user content is not sold, monetized for advertising, or used to train third-party models. Its SOC 2 Type 2 report covers security, privacy, availability, and confidentiality controls.
LanguageTool
LanguageTool is a writing assistant that checks grammar, spelling, punctuation, casing, and style across 31 languages. It also offers tone detection, writing statistics, and paraphrasing modes for making sentences more formal, fluent, simple, or concise. The service works through browser extensions and Windows, macOS, and iOS apps, and integrates with Google Docs, Microsoft Word, Apple Pages, and LibreOffice. Email add-ons are available for Gmail, Outlook, Apple Mail, and Thunderbird. The free version covers spelling, simple punctuation, and some style issues, with a 2,000-character limit per text field; Premium allows up to 150,000 characters. Individual Premium can be billed monthly, quarterly, annually, or every two years, but no plan prices are listed. Text written through the browser add-on is usually not saved; text in the editor is stored and accessible across devices. Teams can manage invited users and share style guides and dictionaries. Business solutions are described as GDPR-conform and support consistent brand voice. Premium has a 14-day money-back guarantee with cancellation and refund without questions.