QuillBot

AI paraphraser, grammar checker, summarizer, and citation suite in one writing workspace

Freemium

About QuillBot

QuillBot is an AI writing assistant built around a multi-mode paraphraser that rewrites text for fluency, formality, or length while keeping the meaning. It bundles a grammar checker, summarizer, plagiarism checker, citation generator, AI detector, humanizer, and a 50-plus-language translator, all tied together in a Google Docs-style co-writer workspace. Founded in 2017 and now owned by Learneo (formerly Course Hero), it's used by tens of millions of students, writers, and researchers.

Learn more at QuillBot

Key Features

Multi-mode paraphraser (Standard, Fluency, Formal, Academic, Simple, Creative, Shorten plus custom modes)
Grammar and punctuation checker with real-time suggestions
Summarizer that condenses long articles into key points
Citation generator supporting APA, MLA, Chicago and 1,000-plus styles
Plagiarism checker that compares text against a large source database
AI detector, AI humanizer, and 50-plus-language translator in one account

Pros & Cons

What we like

Free plan never expires and needs no credit card to start
Paraphraser modes give real control over how much text gets rewritten
Strong fit for academic work with built-in citations and plagiarism checks
Co-writer workspace keeps paraphrasing, grammar, and summarizing in one place

Room for improvement

Free paraphraser is capped at roughly 125 words per pass and two modes
Plagiarism checker is limited to about 20 pages per month even on Premium
Paraphrased output can still read awkwardly and needs a human edit
Monthly Premium pricing is steep compared with the annual rate

Frequently Asked Questions

What is QuillBot?

QuillBot is an AI writing suite best known for its paraphrasing tool. It rewrites text in multiple modes like Standard, Fluency, Formal, and Academic, and bundles a grammar checker, summarizer, citation generator, and translator, making it popular with students, researchers, and writers who refine existing text rather than draft from blank.

Is QuillBot free?

Yes, QuillBot has a free plan that paraphrases up to about 125 words at a time with Standard and Fluency modes and no daily limit. As of 2026 Premium runs roughly 20 dollars a month, or closer to 8 dollars a month billed annually, unlocking longer inputs and all rewrite modes.

What is QuillBot best for?

QuillBot is best for paraphrasing and rephrasing existing text, plus quick grammar checks, summaries, and citations. It shines for students and researchers reworking sources or tightening drafts. It is not built to generate long original articles, so pair it with a content generator for net-new writing.

Is using QuillBot cheating?

Paraphrasing with QuillBot is a writing aid, not automatic cheating, but context matters. Reusing someone else's ideas without citing them is still plagiarism even after rewording, and many schools restrict AI use. Use it to improve your own writing and clarity, and always credit original sources properly.

Best For

Rewriting drafts to improve flow, tone, or word countStudents polishing essays and generating correct citationsSummarizing research papers and reports into quick overviewsChecking writing for grammar issues and potential plagiarism before submitting

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