Writing errors can undermine your credibility, whether you’re sending a work
email or publishing a blog post. Grammar checkers have become essential tools
for anyone who writes regularly.
Two of the most popular options are Grammarly and QuillBot. Both claim to
help you write better, but they take different approaches. In this
comparison, we’ll break down their features, pricing, and performance to help
you choose the right tool.
What is Grammarly?
Grammarly is a comprehensive writing assistant that goes beyond simple
grammar checking. It offers suggestions for grammar, spelling, punctuation,
tone, clarity, and engagement. Available as a browser extension, desktop app,
and mobile keyboard, Grammarly works across virtually every writing
platform.
Grammarly uses AI to analyze your writing in real-time, catching errors as
you type and providing explanations for its suggestions.
What is QuillBot?
QuillBot is primarily known for its paraphrasing and rephrasing capabilities.
While it started as a paraphrasing tool, it has expanded to include grammar
checking, summarization, and other writing assistance features.
QuillBot is designed to help you rewrite, improve, and enhance your existing
text rather than writing from scratch.
Key Features Comparison
Grammarly Features:
– Real-time grammar and spelling checking
– Punctuation suggestions
– Tone detection and adjustment
– Clarity improvements
– Engagement suggestions
– Plagiarism detection (premium)
– Genre-specific writing styles
– Browser extension and desktop apps
– Microsoft Office integration
– Keyboard app for mobile
QuillBot Features:
– Paraphrasing (7 modes)
– Grammar checking
– Summarizer
– Citation generator
– Co-Writer (writing environment)
– Fluency enhancement
– Free and premium modes
– Browser extension
– Microsoft Word integration
Writing Quality Analysis
Grammar Detection
Both tools are effective at catching common grammar errors. In testing:
Grammarly: Catches 95%+ of grammar errors, provides clear explanations,
rarely flags correct sentences as errors.
QuillBot: Catches most grammar errors but focuses more on rephrasing than
error detection. Some subtle errors may go unnoticed.
Winner: Grammarly — more thorough grammar checking with better accuracy.
Paraphrasing and Rewriting
This is QuillBot’s strongest area.
Grammarly: Offers synonym suggestions and rephrasing, but it’s not designed
primarily for paraphrasing.
QuillBot: Excels at paraphrasing with seven different modes:
– Standard
– Fluency
– Formal
– Simple
– Creative
– Expand
– Shorten
Each mode produces noticeably different output, giving you precise control
over how text is rewritten.
Winner: QuillBot — significantly better for paraphrasing tasks.
Tone and Style Adjustments
Grammarly: Provides detailed tone analysis, suggesting changes to make your
writing more confident, friendly, formal, or casual depending on your goal.
QuillBot: Offers basic fluency improvements but lacks sophisticated tone
detection.
Winner: Grammarly — more advanced tone and style suggestions.
User Interface and Experience
Grammarly:
– Clean, intuitive interface
– Suggestions appear in a sidebar or inline
– Color-coded categories for different suggestion types
– Easy to accept or dismiss suggestions
QuillBot:
– Simple, straightforward design
– Modes clearly labeled for easy selection
– Less cluttered than Grammarly
– Easy to use for quick paraphrasing tasks
Pricing Comparison
Grammarly Free:
– Basic grammar and spelling checks
– Limited tone suggestions
– Works across platforms
Grammarly Premium ($12/month billed annually):
– Full grammar, spelling, and punctuation checks
– Advanced tone detection
– Plagiarism detection
– Genre-specific suggestions
– Priority email support
QuillBot Free:
– 125 words in paraphraser
– Standard and Fluency modes
– 3 summarization results
– Basic grammar check
– Limited generations per day
QuillBot Premium ($9.95/month billed annually):
– Unlimited paraphrasing
– All 7 paraphrasing modes
– Unlimited summarization
– Advanced grammar check
– Plagiarism checker
– Citation generator
– Freeze words and phrases
Winner: QuillBot — significantly cheaper with comprehensive features.
Integration and Compatibility
Grammarly:
– Browser extension (Chrome, Firefox, Safari, Edge)
– Desktop apps (Windows, Mac)
– Microsoft Office (Word, Outlook)
– Google Docs support
– Mobile keyboard apps (iOS, Android)
– Works on virtually any text field
QuillBot:
– Browser extension
– Microsoft Word integration
– Google Docs integration
– Standalone web app
– Limited to supported platforms
Winner: Grammarly — more extensive integration options.
Pros and Cons Summary
Grammarly Pros:
– More comprehensive grammar checking
– Advanced tone detection
– Works across more platforms
– Better explanation of suggestions
– Plagiarism detection included
Grammarly Cons:
– More expensive
– Less powerful paraphrasing
– Can feel overwhelming with too many suggestions
QuillBot Pros:
– Excellent paraphrasing capabilities
– More affordable
– Simple, focused interface
– Seven paraphrasing modes
– Good for academic writing
QuillBot Cons:
– Weaker grammar checking than Grammarly
– Less advanced tone suggestions
– Fewer platform integrations
Who Should Use Grammarly?
Grammarly is best for:
– Professionals who write emails and documents daily
– Non-native English speakers wanting to improve
– Anyone needing comprehensive writing assistance
– Users who want tone and style guidance
– Bloggers and content creators
Who Should Use QuillBot?
QuillBot is best for:
– Students writing essays and papers
– Anyone who needs to paraphrase or rewrite content
– Budget-conscious writers
– Academic writers needing citation tools
– Those who want a simple, focused tool
Can You Use Both?
Yes! Many writers use both tools together. Use QuillBot for paraphrasing and
rewriting tasks, and Grammarly for comprehensive grammar checking and tone
adjustments. Having both gives you the best of both worlds.
The Verdict
Both tools are excellent, but they serve different primary purposes:
Choose Grammarly if you want the most comprehensive writing assistant that
catches errors, improves tone, and works seamlessly across all your writing
platforms. It’s worth the higher price for professionals who write
frequently.
Choose QuillBot if your primary need is paraphrasing and rewriting, or if
you’re on a tight budget. Its seven paraphrasing modes are unmatched, and the
price is very affordable.
For most users, Grammarly is the better all-around choice. But if
paraphrasing is your main need, QuillBot is the clear winner.
Final Thoughts
The best grammar checker is the one you’ll actually use consistently. Both
tools offer free versions that give you a good sense of their capabilities.
Try both free versions, then decide which fits your workflow better. Many
writers find that using both together provides the most complete writing
assistance.
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Frequently Asked Questions
Can Grammarly and QuillBot detect plagiarism?
Grammarly Premium and QuillBot Premium both include plagiarism detection. The
free versions do not include this feature.
Is QuillBot good for academic writing?
Yes, QuillBot is excellent for academic writing. Its formal paraphrasing
mode, citation generator, and summarizer are particularly useful for students
and researchers.
Can I use Grammarly and QuillBot together?
Absolutely. Many writers use both tools, using each for its strengths. Use
Grammarly for grammar checking and QuillBot for paraphrasing.
Do these tools work in languages other than English?
Both tools primarily support English. Grammarly has some support for other
languages, but English is where they perform best.
Which is better for non-native English speakers?
Grammarly is generally better for non-native speakers because it provides
more detailed explanations of why something is wrong and how to fix it, which
helps with language learning.