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Grammarly vs QuillBot
Grammarly scores higher overall (8.6 vs 8.1), but the right pick depends on what you need.
Choose Grammarly if…
Anyone who wants polished, correct writing in every app without copying text into a separate tool
8.6/10★★★★★Full review →Choose QuillBot if…
Students and non-native English writers who want to rephrase, summarise and cite on a budget
8.1/10★★★★★Full review →Side by side
| Grammarly | QuillBot | |
|---|---|---|
| Overall score | 8.6/10 | 8.1/10 |
| Rank in category | #1 of 10 | #2 of 10 |
| Price | Freemium · from $12/month | Freemium · from $8.33/month |
| Free version | Basic spelling, grammar and tone checks plus 100 AI prompts a month | Grammar checks plus paraphrasing of up to 125 words at a time in basic modes |
| Platforms | Web, iOS, Android, Desktop app, Chrome extension, Microsoft Word, Google Docs | Web, iOS, Android, Chrome extension, Microsoft Word, Google Docs |
| Made by | Superhuman (formerly Grammarly, Inc.) | QuillBot (Learneo, Inc.) |
| Writing quality | 8.5 | 7.5 |
| Ease of use | 9 | 8.5 |
| Features | 8.5 | 8 |
| Value for money | 7.5 | 8 |
| Platforms | 10 | 9 |
Grammarly: what the AI does
- Real-time grammar, clarity and tone suggestions
- Full-sentence and paragraph rewrites
- Generative AI prompts for drafting and replies
- Plagiarism and AI-text detection
- Agents such as Citation Finder, AI Grader and Reader Reactions
- Superhuman Go assistant in the browser extension
- Works almost everywhere you type: browser, desktop, mobile keyboard, Word and Docs
- The most dependable grammar and clarity checks for English
- Free plan is genuinely useful
- Pro bundles plagiarism and AI-text detection
- Monthly billing ($30) is expensive compared with the annual price
- Its AI drafting is weaker than dedicated chatbots for long-form writing
- The extension reads everything you type, which raises privacy questions for some
QuillBot: what the AI does
- Paraphraser with nine modes and a synonym slider
- Grammar checker
- Summarizer
- AI detector and humanizer
- Plagiarism checker (20 pages a month on Premium)
- Translator and citation generator
- Best-in-class paraphrasing with fine control over how much text changes
- Lots of tools in one subscription
- Cheaper than Grammarly on annual billing
- Mobile apps include an AI keyboard
- Free paraphrasing is capped at 125 words per input
- Grammar checking is less thorough than Grammarly's
- Annual price doubled from $49.95 to $99.95 in 2025