- Best for
- Students and non-native English writers who want to rephrase, summarise and cite on a budget
- Price
- Freemium · from $8.33/month
Free: Grammar checks plus paraphrasing of up to 125 words at a time in basic modes - Platforms
- Web, iOS, Android, Chrome extension, Microsoft Word, Google Docs
- Made by
- QuillBot (Learneo, Inc.), Chicago, USA · since 2017
- App store ratings
- iOS 4.7★ (3K) · Android 4.5★ (22.4K)
What it is
QuillBot started as a paraphrasing tool and now bundles a grammar checker, summarizer, citation generator, translator, plagiarism checker and AI detector. Its Paraphraser offers multiple modes and a synonym slider to control how much the text changes. It is owned by Learneo, the company behind Course Hero, which also owns LanguageTool.
Latest: QuillBot's annual Premium price doubled from $49.95 to $99.95 in 2025.
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
Pros and cons
- 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
How it scores
Writing quality7.5
Ease of use8.5
Features8
Value for money8
Platforms9
Excellent paraphrasing and a broad toolkit at a fair annual price; its grammar checks and free limits trail the leader.
Feature checklist · 6 of 9
- ✓Grammar and spelling checks (yes)
- ✓Rewrites or paraphrases your sentences (yes)
- ✓Adjusts tone, formality or length (yes)
- –Drafts new text from a prompt or template (no)
- ✓Works inside other apps via extension, add-in or keyboard (yes)
- ✓Supports languages other than English (yes)
- ✓Plagiarism or AI-detection check (yes)
- –Readability or in-depth style reports (no)
- –Custom style guide, brand voice or matches your own style (no)
How we score apps →
Alternatives
See all QuillBot alternatives, ranked →
- Grammarly 8.6/10Anyone who wants polished, correct writing in every app without copying text into a separate tool
- LanguageTool 8.0/10People who write in more than one language, especially European languages
- ProWritingAid 7.7/10Novelists and long-form writers who want deep editing reports, not just error fixes
- Notion AI 7.6/10Teams that already keep their docs and notes in Notion
Grammarly vs QuillBotQuillBot vs LanguageToolQuillBot vs ProWritingAid
Sources
