QuillBot
A mode-based AI paraphraser and rewriting suite.
QuillBot is best known as a paraphraser with multiple rewrite 'modes', bundled with a grammar checker, summarizer, AI humanizer, plagiarism checker, AI detector and AI chat. Its differentiator is the mode-based paraphrasing engine; it is now part of the Learneo/Course Hero family and popular with students and content editors.
Key features
- Paraphraser with up to 9 rewrite modes
- Grammar checker and summarizer
- Plagiarism checker and AI detector
- AI humanizer and AI chat
Pros
- Strongest dedicated paraphrasing modes
- Broad toolkit in one suite
- Cheap annual pricing
Cons
- No real free trial
- Free tier heavily word-capped (125 words)
- Plagiarism checks are limited
Pricing
Free; Premium from US$8.33/mo (annual)
| Free | $0 |
| Premium | $19.95/mo |
| Team | Custom |
Premium is $8.33/mo billed annually ($99.95/yr) or $19.95 month-to-month. Free tier caps paraphrasing at 125 words. Verified Jun 2026.
Models
Proprietary + AI
Platforms
webbrowser-extwordmobileapi
Good for
AcademicCopywritingBlogging & SEO
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Last reviewed 2026-06-23. Categories: Editing, Grammar.