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Grammarly vs QuillBot — Head-to-Head Comparison
Quick verdict: Grammarly edges ahead with a 4.7/5 rating vs 4.2/5. Grammarly stands out for works everywhere you write, making it the most seamlessly integrated writing assistant available, while QuillBot excels at multiple paraphrasing modes provide genuine variety in how text is rewritten, not just synonym swaps.
Feature Comparison
| Feature | Grammarly | QuillBot |
|---|
| Real-time grammar, spelling, and punctuation correction | ✓ | — |
| Clarity and conciseness suggestions to improve readability | ✓ | — |
| Tone detector showing how your writing sounds to readers | ✓ | — |
| GrammarlyGO generative AI for drafting, rewriting, and brainstorming | ✓ | — |
| Plagiarism checker scanning 16 billion web pages | ✓ | — |
| Style guide enforcement for brand consistency | ✓ | — |
| Full sentence rewrites for clarity and impact | ✓ | — |
| Browser extensions, desktop app, mobile keyboard, and API | ✓ | — |
| Works in 500,000+ apps including Gmail, Slack, Docs, and Word | ✓ | — |
| Personal dictionary and custom style preferences | ✓ | — |
| AI paraphraser with 7 rewriting modes | — | ✓ |
| Grammar checker with real-time corrections | — | ✓ |
| Summarizer for condensing long documents | — | ✓ |
| AI content detector for identifying AI-generated text | — | ✓ |
| Citation generator for academic references | — | ✓ |
Pricing Comparison
| Plan | Grammarly | QuillBot |
|---|
| Starting price | $0/mo | $0/mo |
| Free plan | Yes | Yes |
| Mid tier | $30/mo | $9.95/mo |
Pros & Cons
Grammarly
Pros
- Works everywhere you write, making it the most seamlessly integrated writing assistant available
- Free plan covers core grammar and spelling, providing genuine value without payment
- Tone detection prevents miscommunication in emails and professional messages
- GrammarlyGO adds contextual AI generation without needing a separate writing tool
Cons
- Premium pricing at $30/month is steep for users who primarily need grammar checking
- Suggestions can be overly conservative, flagging stylistic choices as errors in creative writing
- GrammarlyGO word limits mean heavy AI generation users may hit caps quickly
- Does not replace dedicated AI content generators for blog posts, articles, or marketing copy
QuillBot
Pros
- Multiple paraphrasing modes provide genuine variety in how text is rewritten, not just synonym swaps
- Free plan is functional enough for occasional use with core paraphrasing in Standard and Fluency modes
- Academic tools like citation generator and plagiarism checker address real student needs in one platform
- Integrations with Chrome and Word make paraphrasing available wherever you actually write
Cons
- 125-word limit on free paraphrasing is restrictive for anything beyond short paragraphs
- Creative and Expand modes sometimes produce awkward phrasing that requires additional editing
- Not designed for original content generation, making it a complement to rather than replacement for AI writers
- Summarizer accuracy decreases with highly technical or domain-specific content
Which Should You Choose?
Choose Grammarly if:
- Professionals who write daily across email, documents, and messaging and want consistently polished communication
- Non-native English speakers who need real-time grammar and tone guidance to communicate confidently
Try Grammarly
Choose QuillBot if:
- Students and academics who need to paraphrase sources, check citations, and ensure academic integrity
- Writers and professionals who frequently need to rephrase content for different audiences or contexts
Try QuillBot
