QuillBot
AI writing suite for paraphrasing, summarizing, grammar checking, and citation — trusted by 35M+ writers
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About QuillBot
QuillBot is a comprehensive AI writing platform trusted by over 35 million writers across 180+ countries and 140+ academic institutions. Built by Learneo Inc. and originating from the University of Illinois, QuillBot offers one of the broadest suites of AI writing tools available — from its flagship paraphraser and grammar checker to summarization, AI detection, plagiarism checking, citation generation, and AI image tools.
The Paraphraser is QuillBot's most popular tool, letting writers instantly rephrase any text across multiple modes (Standard, Fluency, Formal, Academic, Simple, Creative, Expand, and Shorten) while preserving the original meaning. The Grammar Checker catches errors in real time, while the Summarizer condenses long documents to key points. QuillBot's Chrome extension (4.7/5, 6M+ users) and integrations with Google Docs, Word, and macOS/Windows apps make it available wherever writers work.
QuillBot is ideal for students, academics, professionals, bloggers, and ESL writers who need to rephrase, simplify, or polish their writing quickly — and particularly popular in academic settings for improving essays and managing citations with APA, MLA, and Chicago formats.
Key Features
- AI Paraphraser with 8 modes: Standard, Fluency, Formal, Academic, Simple, Creative, Expand, Shorten
- Grammar Checker for real-time error correction across all writing
- Summarizer to condense long documents and articles to key points
- Plagiarism Checker against billions of web pages
- Citation Generator for APA, MLA, and Chicago formats
- AI Detector to identify AI-generated content
- AI Humanizer to make AI text sound more natural
- Chrome, Edge, Safari extensions plus Word add-in and iOS/Android apps
- Translate tool supporting 30+ languages
- AI Chat for brainstorming and research assistance
Pros
- Trusted by 35M+ users across 180 countries — proven at massive scale
- Paraphraser covers 8 distinct modes for every writing context
- Free plan is genuinely useful with no payment required
- Chrome extension works everywhere including Google Docs and Gmail
- Academic-grade citation generator for APA, MLA, Chicago
- Available on iOS, Android, Windows, macOS, Word, and Chrome
Cons
- Free plan limits paraphraser to 125 words per use
- Paraphrasing can sometimes reduce stylistic nuance
- Not designed for long-form content generation or full drafts
- AI Detector accuracy not as high as specialized detection tools
- Premium pricing can seem high compared to free alternatives
Pricing
QuillBot's free plan provides access to the paraphraser (up to 125 words per use), summarizer, grammar checker, AI chat, plagiarism checker (limited), and citation generator — making it genuinely useful for casual writing tasks at no cost.
Premium plans unlock unlimited paraphrasing in all 8 modes, unlimited grammar checking, advanced plagiarism detection, faster processing, and priority access. Premium pricing is approximately $9.95/month (monthly) or around $4.17/month when billed annually.
Team and institutional plans are available for organizations and academic partnerships, with volume pricing and dedicated support.
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Frequently Asked Questions
Yes — QuillBot has a free plan with access to the paraphraser (up to 125 words per use), summarizer, grammar checker, AI chat, and citation generator. Premium unlocks unlimited usage.
QuillBot offers 8 paraphrasing modes: Standard, Fluency, Formal, Academic, Simple, Creative, Expand, and Shorten. Free users can access Standard and Fluency; Premium unlocks all 8 modes.
Yes — QuillBot has a built-in citation generator supporting APA, MLA, and Chicago formats. It can generate citations from URLs, DOIs, ISBNs, or manual entry.
Yes — QuillBot has a Chrome extension that integrates directly into Google Docs, Gmail, and most web-based writing platforms. It also has add-ins for Microsoft Word.
QuillBot's primary strength is paraphrasing and rewriting — it restructures sentences in multiple styles. Grammarly focuses on real-time grammar correction, tone analysis, and clarity suggestions. Many writers use both tools together.
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