Grammarly vs QuillBot

An in-depth comparison of two AI writing tools — features, pricing, and which one to choose.

Last updated: March 1, 2026

Grammarly

AI writing assistant for grammar and clarity

4.8(520 reviews)

freemium

QuillBot

AI tool for paraphrasing, summarizing, and enhancing writing

4.7(389 reviews)

freemium

Our Verdict

Grammarly dominates grammar checking and tone detection. QuillBot is the clear winner for paraphrasing and summarization. Most writers benefit from using Grammarly for proofreading after using QuillBot to restructure text.

Best for Budget

QuillBot

Best Features

Grammarly

Easiest to Use

QuillBot

Quick Comparison

Metric	Grammarly	QuillBot
Rating	4.8 / 5 4.8	4.7 / 5 4.7
Reviews	520More Reviews	389
Pricing	Freemium	From $8.33/mo
Users	10K+	10K+
Category	Text Processing	Text Processing
Released	2009	2017

Key Features

Grammarly

Real-time grammar, punctuation, and spelling corrections across all writing contexts
Tone detector that identifies and adjusts the emotional register of written content
Clarity and conciseness suggestions for improving readability and impact
Plagiarism detection with 16 billion web page database comparison (Premium)
Vocabulary enhancement with context-appropriate word suggestions
Full-sentence rewrite suggestions for passive voice and awkward constructions
Style guide enforcement for consistent brand and team communication standards
Platform coverage: browser extension, desktop app, Microsoft Office, and Google Docs

QuillBot

AI paraphraser with 9 writing modes: Standard, Fluency, Formal, Creative, and more
Grammar checker with real-time error detection and fix suggestions
Summarizer that condenses articles, papers, and documents to key points
Citation generator supporting APA, MLA, Chicago, and Harvard citation formats
Plagiarism checker integrated directly within the paraphrasing workflow
Translator supporting 30+ language pairs with context-aware translation
AI detector to verify the authenticity of text submitted for review
Chrome extension for QuillBot assistance in Google Docs, Gmail, and any browser text field

Pros & Cons

Grammarly

Pros

Highest accuracy grammar checker on the market — trusted by 30+ million daily users
Works seamlessly inside Gmail, Google Docs, Slack, LinkedIn, and 500,000+ apps
Free tier is genuinely capable — handles most basic grammar and clarity improvements
Tone suggestions help writers calibrate communication for different audiences
Business plan enables company-wide style guide enforcement for consistent messaging

Cons

Premium subscription at $12/month required for plagiarism detection and advanced suggestions
Can be overly conservative with creative writing — sometimes flags intentional stylistic choices
Grammarly AI writing features are less capable than dedicated writing tools like Jasper

QuillBot

Pros

Best paraphrasing modes in the market — Fluency mode produces the most natural rewrites
Free plan includes paraphrasing up to 125 words — useful for quick rewriting tasks
Academic suite covering citation, plagiarism, and summarization in one subscription
Chrome extension integrates QuillBot into existing writing environments seamlessly
Summarizer significantly reduces time spent reading long research documents

Cons

Free plan is limited to 125 words per paraphrase — insufficient for longer content
Premium required for unlimited paraphrasing, plagiarism checker, and all modes
Grammar checker is less comprehensive than Grammarly for advanced style suggestions

Best For

Grammarly

Professional email writingBusiness communicationsAcademic writingContent creators and bloggersAnyone wanting to improve writingESL professionals

QuillBot

Academic writing and essaysContent rewriting and rephrasingGrammar and clarity improvementAvoiding plagiarismESL writers improving English

Pricing Plans

Grammarly

Free$0/monthly

For individuals - Write without spelling and grammar mistakes

Pro$30/monthly

For eligible individuals and teams - Achieve your goals with clear and confident writing

Enterprise$0/custom

For larger organizations - Drive results across your entire organization with trusted AI

QuillBot

Free$0/monthly

Limited access to writing tools

Premium$19.95/yearly

Unlimited access to all tools (or $19.95/month monthly)

Related Comparisons

Grammarly vs ProWritingAid Grammarly vs Wordtune DeepL Write vs Grammarly Grammarly vs Hemingway Editor Notion AI vs QuillBot Grammarly vs Smodin

Full review

Grammarly

Full review

QuillBot

Metric

Grammarly

QuillBot

Rating

4.8 / 5

4.8

4.7 / 5

4.7

Reviews

520More Reviews

389

Pricing

Freemium

From $8.33/mo

Users

10K+

Grammarly

Real-time grammar, punctuation, and spelling corrections across all writing contexts
Tone detector that identifies and adjusts the emotional register of written content
Clarity and conciseness suggestions for improving readability and impact
Plagiarism detection with 16 billion web page database comparison (Premium)
Vocabulary enhancement with context-appropriate word suggestions
Full-sentence rewrite suggestions for passive voice and awkward constructions
Style guide enforcement for consistent brand and team communication standards
Platform coverage: browser extension, desktop app, Microsoft Office, and Google Docs

QuillBot

AI paraphraser with 9 writing modes: Standard, Fluency, Formal, Creative, and more
Grammar checker with real-time error detection and fix suggestions
Summarizer that condenses articles, papers, and documents to key points
Citation generator supporting APA, MLA, Chicago, and Harvard citation formats
Plagiarism checker integrated directly within the paraphrasing workflow
Translator supporting 30+ language pairs with context-aware translation
AI detector to verify the authenticity of text submitted for review
Chrome extension for QuillBot assistance in Google Docs, Gmail, and any browser text field

Pros & Cons

Grammarly

Pros

Highest accuracy grammar checker on the market — trusted by 30+ million daily users
Works seamlessly inside Gmail, Google Docs, Slack, LinkedIn, and 500,000+ apps
Free tier is genuinely capable — handles most basic grammar and clarity improvements
Tone suggestions help writers calibrate communication for different audiences
Business plan enables company-wide style guide enforcement for consistent messaging

Cons

Premium subscription at $12/month required for plagiarism detection and advanced suggestions
Can be overly conservative with creative writing — sometimes flags intentional stylistic choices
Grammarly AI writing features are less capable than dedicated writing tools like Jasper

QuillBot

Pros

Best paraphrasing modes in the market — Fluency mode produces the most natural rewrites
Free plan includes paraphrasing up to 125 words — useful for quick rewriting tasks
Academic suite covering citation, plagiarism, and summarization in one subscription
Chrome extension integrates QuillBot into existing writing environments seamlessly
Summarizer significantly reduces time spent reading long research documents

Cons

Free plan is limited to 125 words per paraphrase — insufficient for longer content
Premium required for unlimited paraphrasing, plagiarism checker, and all modes
Grammar checker is less comprehensive than Grammarly for advanced style suggestions

Pricing Plans

Grammarly

Free$0/monthly

For individuals - Write without spelling and grammar mistakes

Pro$30/monthly

For eligible individuals and teams - Achieve your goals with clear and confident writing

Enterprise$0/custom

For larger organizations - Drive results across your entire organization with trusted AI

QuillBot

Free$0/monthly

Limited access to writing tools

Premium$19.95/yearly

Unlimited access to all tools (or $19.95/month monthly)