QuillBot and Grammarly are both AI writing tools — but they serve fundamentally different purposes. Here’s how to decide which one belongs in your workflow, and whether you need both.
Core Difference in One Sentence
Grammarly fixes your writing. QuillBot rewrites it. Grammarly catches errors and improves clarity in what you’ve written; QuillBot generates alternative versions of your text.
Feature Comparison
| Feature | Grammarly | QuillBot |
|---|---|---|
| Grammar & spell check | ✅ Best-in-class | ⚠️ Basic |
| Paraphrasing | ⚠️ Limited (Premium) | ✅ Core feature |
| Plagiarism check | ✅ Premium | ✅ Premium |
| Tone detection | ✅ Yes | ❌ No |
| Summarizer | ❌ No | ✅ Yes |
| Citation generator | ❌ No | ✅ Yes |
| Browser extension | ✅ Excellent | ✅ Available |
| Word processor integration | ✅ Word, Docs | ✅ Word, Docs |
Pricing
| Tool | Free | Premium | Annual |
|---|---|---|---|
| Grammarly | Basic corrections | ~$30/mo | ~$144/yr |
| QuillBot | 125 words/paraphrase | $9.95/mo | $49.95/yr |
When Grammarly is the Better Choice
- You write original content and need real-time error correction
- You send business emails, reports, or professional documents
- You write across multiple platforms and want browser-wide coverage
- Tone consistency and audience appropriateness matter to your writing
When QuillBot is the Better Choice
- You need to paraphrase existing content to avoid repetition or plagiarism
- You want to simplify complex text for different audiences
- You use AI tools and need to humanize the output
- You’re a student who needs a citation generator and summarizer
The Verdict: Use Both
Given QuillBot’s low cost ($50/year), the best approach for most bloggers is to use both: QuillBot for paraphrasing and content variation, Grammarly for final grammar and tone checking before publishing. Together they cover complementary parts of the writing process. Try Grammarly free | Try QuillBot free.