QuillBot
AI paraphrasing, summarization, and grammar checking tool for writers
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About
QuillBot is one of the most widely used AI writing tools in the world, primarily known for its powerful paraphrasing capabilities. It helps writers, students, and professionals rephrase text while preserving meaning — useful for avoiding plagiarism, simplifying complex language, or finding fresh ways to express ideas.
Beyond paraphrasing, QuillBot offers a full suite of writing tools including a summarizer (for condensing long documents into key points), a grammar checker, a citation generator, a co-writer for drafting content, and a plagiarism checker. The platform offers multiple writing modes such as Standard, Fluency, Formal, Simple, Creative, Expand, and Shorten to give users fine-grained control over output style.
With over 35 million users globally, QuillBot has become an essential tool for academic writing, content creation, and business communication. Its Chrome extension integrates directly into Gmail, Google Docs, and other web applications, making it accessible wherever users write.
Beyond paraphrasing, QuillBot offers a full suite of writing tools including a summarizer (for condensing long documents into key points), a grammar checker, a citation generator, a co-writer for drafting content, and a plagiarism checker. The platform offers multiple writing modes such as Standard, Fluency, Formal, Simple, Creative, Expand, and Shorten to give users fine-grained control over output style.
With over 35 million users globally, QuillBot has become an essential tool for academic writing, content creation, and business communication. Its Chrome extension integrates directly into Gmail, Google Docs, and other web applications, making it accessible wherever users write.
Product Features
- Paraphraser with 8 writing modes (Standard, Fluency, Formal, Simple, Creative, etc.)
- AI Summarizer for condensing articles and documents
- Grammar Checker for error detection and correction
- Co-Writer for AI-assisted drafting
- Citation Generator supporting APA, MLA, Chicago, and more
- Plagiarism Checker with academic database comparison
- Word Flipper for synonym suggestions
- Tone detection and adjustment
- Chrome extension for in-browser writing
- Integration with Microsoft Word
- AI Summarizer for condensing articles and documents
- Grammar Checker for error detection and correction
- Co-Writer for AI-assisted drafting
- Citation Generator supporting APA, MLA, Chicago, and more
- Plagiarism Checker with academic database comparison
- Word Flipper for synonym suggestions
- Tone detection and adjustment
- Chrome extension for in-browser writing
- Integration with Microsoft Word
About the Publisher
QuillBot was founded in 2017 by Rohan Gupta, David Silin, and Anil Jason. Based in Chicago, Illinois, the company was acquired by Course Hero in 2021 for a reported $4.6 billion — one of the largest acquisitions in edtech history. QuillBot serves over 35 million users across 150 countries, with particularly strong adoption among students, academics, and ESL (English as a Second Language) users who rely on it for writing improvement and language learning.