GrammarCheck.ai vs Writefull
GrammarCheck.ai
grammarcheck.aiWritefull
writefull.comSide by side
| Figure | GrammarCheck.ai | Writefull |
|---|---|---|
| Price from | $2.50/mo | $12.50/mo |
| Free plan | Yes | Yes |
| Free trial | — | — |
| Open source | — | — |
| Web | Yes | Yes |
| Windows | — | Yes |
| macOS | — | Yes |
| Linux | Yes | — |
| iOS | Yes | — |
| Android | Yes | — |
| API | Yes | Yes |
| Plans published | 13 | 7 |
| Spec score · AI Grammar Checkers | 9.4 (#1) | 8.6 (#13) |
| API | The API plans provide grammar-checking API access with stated credit, submission-word, and requests-per-minute limits. | The Language API accepts batches of sentences or documents and returns corrections and quality metrics as JSON or Track Changes. |
| Browser extension | The Chromium extension accepts typed, pasted, uploaded or selected web text and provides grammar, spelling and readability checking. | Yes |
| Free plan | Yes | Yes |
| Support | The site offers contact-form support, live chat and 24/7 priority support on paid plans. | Writefull directs users to its FAQs, Help Center, and contact form for assistance. |
| What it does | GrammarCheck.ai checks and corrects grammar, spelling and punctuation using AI, with highlighted mistakes and automatic suggestions. | Writefull provides AI language feedback and writing assistance aimed at academic and research writing. |
Plans
GrammarCheck.ai
- Free PlanFree
- Lite$4 a month
- Pro$7 a month
- Free PlanFree
- Lite Premium$2.50 a month
- Lite Monthly$4 a month
- Pro Premium$4 a month
- API Tester$7 a month
- Pro Monthly$7 a month
- API Basic$10 a month
Writefull
- FreeFree
- FreeFree
- Premium$150 a year
- Premium$150 a year
- Group$285 a year
- Group$285 a year
- InstitutionPriced on request
In their own words
GrammarCheck.ai
GrammarCheck.ai checks grammar, spelling, and punctuation, highlighting mistakes and suggesting replacements; a one-click “Fix All Errors” action is also listed. It supports English variants for the US, UK, Australia, and Canada, as well as Spanish, German, French, Portuguese, Italian, and Dutch. Other listed tools include punctuation checking, paraphrasing, plagiarism checking, AI detection, AI humanizing, and summarizing. The service is available on web, iOS, Android, and Linux, with browser extension, desktop app, and mobile app options. Its free plan allows up to 650 words per submission, while Lite allows 2,000 and Pro 6,000. The plans list $4 a month for Lite and $7 a month for Pro; the pricing note separately says paid plans start at $2.50/mo (annual). The service does not offer a free trial, though tools can be used for free. Guest users can make three submissions per minute. The site identifies students, book authors, bloggers, and non-native English speakers as potential users.
Writefull
Writefull provides AI language feedback, writing tools, and data insights for research writing. Its language models are trained on academic texts and suggest improvements to grammar, word use, style, and phrasing. Other tools can paraphrase, change style, split or join sentences, summarize or explain text, and generate titles and abstracts. Writefull integrates with Overleaf, offering LaTeX-tailored feedback, TeXGPT, and table and equation generators. Its Microsoft Word add-in works with Windows, Mac, and Word Online. The service is available on the web, Windows, macOS, and as a browser extension. The Overleaf extension supports Chrome, Chromium, and Brave; Writefull Revise supports Chrome, Firefox, Safari, and Chromium-based Edge. Revise returns edits through Track Changes and is limited to publishers and institutions. A free plan has limited quotas for language editing and rewriting. Writefull says it does not store users’ text, use text or interactions to train its AI, or sell data to third parties. Some features use third-party APIs, with user consent requested before text is sent.