QuillBot vs Grammarly
QuillBot and Grammarly are the two most popular AI writing tools — but they're not actually doing the same job. Grammarly checks and corrects writing you've already done. QuillBot rewrites and paraphrases your text into different styles, tones, and structures. Understanding which job you need done is the only way to choose.
QuillBot
AI paraphrasing and rewriting tool. Rewrites text in 8 modes while preserving meaning. Free for up to 125 words.
Free / $9.95/mo
- Best paraphrasing tool available
- Generous free tier (125 words)
- Academic citation generator included
- Works in Chrome + Google Docs
- Affordable premium plan
- Free tier limited to 125 words
- Over-paraphrasing can strip nuance
- Plagiarism checker requires Premium
- Not ideal for long-form content creation
Grammarly
AI writing assistant that checks grammar, spelling, tone, and clarity. Works across 500,000+ apps and websites.
Free / $12–$15/mo
- Works everywhere (500,000+ apps)
- Free tier is genuinely useful
- Consistent, reliable suggestions
- GrammarlyGO for AI drafting
- Used by students, professionals, and businesses
- Premium is expensive vs alternatives
- Sometimes suggests unnecessary changes
- Plagiarism checker is basic vs dedicated tools
- Can feel intrusive with constant suggestions
Feature Comparison
| Feature | QuillBot | Grammarly |
|---|---|---|
| Grammar & Spell Check | Good | Best-in-class |
| Paraphrasing Tool | Best-in-class | |
| Real-time Browser Extension | Limited | Excellent |
| Tone Detection | Via modes (Formal, Simple) | Yes (inline) |
| Summarizer | ||
| Citation Generator | ||
| Plagiarism Checker | Premium only | Premium only |
| Free Tier | Generous (125 words at a time) | Yes (grammar + tone) |
Pricing Comparison
QuillBot Pricing
- Free: 125 words per paraphrase, 2 paraphrase modes
- Premium ($9.95/mo or $4.17/mo annual): Unlimited words, all 8 modes, compare mode, faster processing, plagiarism checker
Grammarly Pricing
- Free: Grammar, spelling, punctuation correction
- Premium ($12/mo or $7.69/mo annual): Style, tone, clarity, delivery, plagiarism detection
- Business ($15/user/mo): Style guides, brand tone, team analytics
Best For
Choose QuillBot if you...
- • Paraphrase sources for essays or research papers
- • Rewrite content in different styles or tones
- • Need a summarizer for long documents
- • Want citation generation built in
Choose Grammarly if you...
- • Want real-time grammar correction everywhere online
- • Write professional emails, reports, or Slack messages
- • Need tone suggestions inline while you type
- • Prefer a writing assistant you do not have to open separately
The Verdict
QuillBot wins for paraphrasing and rewriting. Grammarly wins for grammar and real-time correction. If you write essays, research papers, or need to avoid plagiarism by rewriting sources — QuillBot is unmatched. Its paraphraser is the best available and the reason millions of students pay for Premium.
If you want real-time grammar correction that works inside Gmail, Google Docs, Slack, and everywhere you write on the web — Grammarly is the obvious choice. Its free tier handles 90% of grammar and clarity needs. For most professionals, Grammarly is the daily driver; QuillBot is the rewrite tool you pull out when needed.