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About QuillBot
QuillBot is an AI-powered writing assistant specializing in paraphrasing, grammar checking, summarizing, and citation generation. With over 30 million monthly active users, it is widely used by students, professionals, and content creators to rewrite text while preserving original meaning. Acquired by Learneo (formerly Course Hero) in 2021.
Updated 6/24/2026
Key Features
- AI Paraphraser — Rewrites text naturally using NLP; multiple modes: Standard, Fluency, Formal, Simple, Creative, Expand, Shorten
- Grammar Checker — Identifies grammar, spelling, and punctuation errors with instant suggestions
- Plagiarism Checker — Sentence-by-sentence analysis against multiple sources with detailed reports
- Co-Writer — AI-powered text editor combining web search, AI writing, grammar check, and citation builder in one interface
- Summarizer — Generates concise summaries of articles, documents, and research papers
- Citation Generator — Creates proper citations in APA, MLA, Chicago, and other styles from URLs, titles, and ISBNs
- Translator — Translates text between 45 languages
- Browser Extension and Integrations — Works with Google Docs, Microsoft Word, and Chrome
Pricing Structure
- Free — $0/month — 125 words per submission, 2 writing modes (Standard, Fluency), basic grammar check.
- Premium — $8.33/month (annual) — Unlimited words, all 7 modes, faster processing, advanced grammar, plagiarism checker, Co-Writer.
- Team — Contact sales — Shared workspace, admin controls, team analytics, centralized billing.
Why People Use It
QuillBot is the best dedicated paraphrasing tool on the market. While generic AI chatbots can rewrite text, QuillBot's purpose-built NLP models produce more natural rewrites with better meaning preservation. The combination of paraphrasing, grammar checking, summarizing, and citation generation makes it an all-in-one writing toolkit for students and professionals.
See QuillBot in Action
