Last updated: 2026-06-17
AI writing tools for paraphrasing, grammar checking, summarizing, plagiarism detection, and AI detection Compare pricing, features & alternatives on hokai.io.
QuillBot is an AI ai writing assistant by QuillBot Inc. that ai writing tools for paraphrasing, grammar checking, summarizing, plagiarism det.
QuillBot is a writing toolkit used by 35M+ people. The core tool is a paraphraser with 10+ modes — Standard, Fluency, Formal, Simple, Creative, and others — that rewrites text while preserving meaning. It also includes a grammar checker, summarizer, plagiarism detector, AI detector, and citation generator. More recently, QuillBot added AI Chat, an AI Image Generator, an AI Humanizer for rewriting AI-generated content, and a presentation builder. It supports paraphrasing in 23 languages. Browser extensions work in Chrome, Edge, and Safari; desktop apps integrate directly with Microsoft Word. It's widely used by students, ESL writers, content marketers, and researchers. Over 140 academic institutions have adopted it. The free plan covers basic paraphrasing with word limits; Premium unlocks all modes, unlimited use, and the full toolkit.
Free tier with unlimited basic paraphrasing (125 words per use) and core tools. Premium at $19.95/month, $39.95 quarterly ($13.31/mo), or $99.95 annually ($8.33/mo). Student plan $6.25/month with .edu verification. Team plans start at $7.50/user/month with volume discounts.
| Feature | Free | Premium Annual | Premium Monthly | Premium Quarterly |
|---|---|---|---|---|
| Paraphrasing | Limited (125 words/use) | Unlimited | Unlimited | Unlimited |
| Paraphrasing Modes | Standard Only | All 10+ Modes | All 10+ Modes | All 10+ Modes |
| Grammar Checker | Basic | Advanced | Advanced | Advanced |
| Plagiarism Detection | — | 25,000 words/month | 25,000 words/month | 25,000 words/month |
| AI Detection & Humanizer | — | ? | ? | ? |
| AI Chat & Image Gen | — | ? | ? | ? |
| Multiple Language Support (23) | ? | ? | ? | ? |
| Browser Extensions | ? | ? | ? | ? |
QuillBot is a writing toolkit used by 35M+ people, centered on a paraphraser with 10+ modes — Standard, Fluency, Formal, Simple, Creative, and others — that rewrites text while preserving meaning. It also includes a grammar checker, summarizer, plagiarism detector, AI detector, and citation generator.
QuillBot offers a free plan covering basic paraphrasing with word limits per rewrite. Premium unlocks all 10+ paraphrasing modes, unlimited word counts, and the full toolkit including AI detector, AI Humanizer, and presentation builder, with monthly and annual pricing options.
Key features include 10+ paraphrasing modes supporting 23 languages, a grammar checker, summarizer, plagiarism detector, AI detector, citation generator, AI Chat, an AI Image Generator, an AI Humanizer for rewriting AI-generated content, and a presentation builder. Browser extensions work in Chrome, Edge, and Safari, with desktop integration for Microsoft Word.
Yes, QuillBot's free plan covers basic paraphrasing with per-rewrite word limits. Premium removes word limits and unlocks all 10+ modes plus the full toolkit (grammar, summarizer, plagiarism detector, AI detector).
QuillBot is best for students, ESL writers, content marketers, and researchers who need to paraphrase, check grammar, and verify originality — over 140 academic institutions have adopted it. Users primarily needing tone/clarity suggestions across many apps may prefer Grammarly.
QuillBot's core strength is paraphrasing with 10+ distinct rewriting modes across 23 languages plus an AI Humanizer and AI detector, while Grammarly focuses on grammar, spelling, and tone correction integrated across 1 million+ apps. Many users use both tools for complementary purposes.
Yes, QuillBot supports paraphrasing in 23 languages, with browser extensions for Chrome, Edge, and Safari and a desktop app that integrates directly with Microsoft Word.
Yes, over 140 academic institutions have adopted QuillBot, primarily for its grammar checker, plagiarism detector, citation generator, and paraphrasing tools used by students and researchers.