QuillBot Review: The AI Paraphraser & Grammar Tool

WritingFreemium

Best for: Paraphrasing & grammar checking

QuillBot is the AI paraphrasing and grammar tool that rewrites, checks, summarizes, and humanizes your writing in one suite.

4.7(16.7k)

Founded 2017

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QuillBot paraphrasing interface showing original text and its rewritten version

What Is QuillBot and How Does It Work?

QuillBot is an AI writing assistant built around a powerful paraphrasing engine. Paste a sentence or paragraph, pick a mode, and QuillBot rewrites it while keeping the original meaning — with side-by-side comparison so you can see exactly what changed.

Beyond rewriting, it includes a grammar checker, text summarizer, plagiarism checker, AI content detector, humanizer that rewrites AI text to sound more natural, translator, and citation generator. Everything lives in one interface, which is why it has become the default alternative to Grammarly for students and professionals.

QuillBot Features: Paraphraser, Grammar & More

QuillBot is more than a thesaurus on steroids.

Paraphraser with 9+ modes including Formal, Academic, and Creative
Grammar checker and spell checker
Summarizer for long documents
Plagiarism checker and AI Detector
AI Humanizer to make AI text read naturally
Translator in 40+ languages and citation generator

QuillBot vs Grammarly: What's the Difference?

Grammarly excels at real-time grammar and style correction as you type — it's an editor. QuillBot excels at rewriting and paraphrasing — it's a transformer. QuillBot's paraphraser is widely considered the best in the category, and its all-in-one suite (plagiarism, summarizer, AI detection) costs less than Grammarly Premium.

Many writers use both: Grammarly catches errors while typing, and QuillBot rewrites sections that need a different tone or better flow.

QuillBot Pricing: Free vs Premium

Free plan; Premium $19.95/mo ($8.33/mo billed annually); Team plans custom

Free

For light, occasional writing help.

Paraphrase up to 125 words
Standard & Fluency modes
Grammar checker
Free AI Detector & summarizer

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Best For

Recommended use cases and scenarios where QuillBot shines.

content-creation education resume-writing research marketing

QuillBot: Strengths and Weaknesses

QuillBot is the best value in AI writing tools, with a few trade-offs to note.

Pros

Best-in-class paraphrasing with 9+ modes
All-in-one suite: grammar, summary, plagiarism, AI detection
Generous free tier with free AI Detector
Chrome, Word, and Google Docs integrations

Cons

Free paraphrasing limited to 125 words
Plagiarism checker is Premium-only
Premium monthly price is steep ($19.95)
AI Humanizer quality varies

Frequently Asked Questions

Common questions about QuillBot, answered.

Is QuillBot free?

Yes. The free plan gives you paraphrasing up to 125 words per run, grammar checking, a summarizer, and a completely free AI Detector with no word limit. Premium removes word caps and unlocks every mode.

How much does QuillBot Premium cost?

QuillBot Premium is $19.95 per month, $13.31 per month billed quarterly, or $8.33 per month billed annually ($99.95/year). Students often qualify for additional discounts.

Is QuillBot better than Grammarly?

They serve different purposes. QuillBot is better for paraphrasing, rewriting, and humanizing AI text. Grammarly is better for real-time grammar and style checking as you write. Both are popular — many people subscribe to both for different jobs.

Does QuillBot detect AI-written text?

Yes. QuillBot has a built-in AI Detector that is completely free, and an AI Humanizer that rewrites AI-generated text to sound more natural and pass AI detection in most cases.

Is QuillBot allowed in school?

QuillBot is widely used by students for paraphrasing and grammar help. Academic integrity policies vary by school — it's best used to understand and improve your own writing rather than to generate text for submission.