Grammarly AI vs QuillBot: Complete Comparison 2026
An in-depth comparison of features, pricing, and user experience to help you make the right choice.
Grammarly AI
8.5(8,500 reviews)
AI writing assistant combining grammar checking, tone detection, and generative AI to help teams write clearly and on-brand.
QuillBot
8.0(2,800 reviews)
AI paraphrasing and grammar tool that rewrites text in multiple modes with built-in summarizer and citation generator.
Quick Comparison
| Aspect | Grammarly AI | QuillBot |
|---|---|---|
| Best For | Professionals who write daily and need everything polished before sending | Students paraphrasing research for academic papers |
| Pricing Model | Freemium | Freemium |
| Starting Price | Free | Free |
| Deployment | cloud | cloud |
| Platforms | WEB, IOS, ANDROID, MAC, WINDOWS | WEB, WINDOWS, MAC |
| Rating | 8.5/10 | 8.0/10 |
Pros & Cons
Grammarly AI
Pros
- Works everywhere you write - browser, desktop, mobile, Slack, Docs, Office, Notion
- Grammar and tone correction engine is still the most accurate in the industry
- Free tier is genuinely useful with basic corrections and 100 AI prompts monthly
- GrammarlyGO rewrites and compositions are clean and professional for business use
- Over 30 million daily users means the product is battle-tested at massive scale
Cons
- Can't generate long-form content from scratch like Jasper or Writesonic
- GrammarlyGO prompt limits (100-1,000/month) frustrate heavy AI users
- SEO features are minimal - no keyword research or content optimization scoring
- AI suggestions sometimes over-correct casual writing into stiff corporate tone
- Premium at $12/month feels pricey for what many still perceive as a grammar checker
QuillBot
Pros
- Paraphrasing is best-in-class with seven distinct rewriting modes
- Free tier is genuinely useful, not just a teaser
- Cheaper than Grammarly Premium while offering paraphrasing features Grammarly lacks
- Chrome extension and Word add-in integrate into existing workflows
- Summarizer saves hours when processing long research papers
- Citation generator handles APA, MLA, Chicago, and more automatically
Cons
- Sometimes changes meaning when paraphrasing, especially in Creative mode
- Grammar checker misses subtle errors that competitors catch
- Plagiarism checker limited to 20 pages monthly even on Premium
- Free version word limit (125 words) forces constant copy-paste cycles
- No long-form content generation - strictly a rewriting and editing tool
Pricing Comparison
| Product | Pricing Model | Starting Price |
|---|---|---|
| Grammarly AI | freemium | Free0 |
| QuillBot | freemium | Free0 |
Our Verdict
Choose Grammarly AI if...
Professionals who write daily and need everything polished before sending
Choose QuillBot if...
Students paraphrasing research for academic papers
Still Not Sure?
Explore more alternatives or read in-depth reviews to make your decision.