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AI Tool Comparison
Grammarly vs QuillBot
A side-by-side breakdown to help you pick the right tool for your workflow.
Grammarly
Catch grammar and clarity issues as you write, then let built-in AI agents draft, rewrite, and complete tasks across your apps. Grammarly's parent company rebranded to Superhuman in October 2025.
Writing
freemium
QuillBot
Paraphrase text in unlimited style modes while checking it for grammar errors, plagiarism, and AI-detection risk in one pass. AI Detector and AI Humanizer are now bundled into every premium plan.
Writing
freemium
Bottom Line
Grammarly edges ahead on rating (4.7 vs 4.6), but the right pick still comes down to which workflow you're running.
Choose Grammarly if…
Writing
Choose QuillBot if…
Writing
| Attribute | Grammarly | QuillBot |
|---|---|---|
| Category | Writing | Writing |
| Pricing | freemium | freemium |
| Pricing Detail | Free / $12/mo Pro (annual) / Enterprise custom | Free / $19.95/mo Premium (or $8.33/mo billed annually) |
| Rating |
Key Features
Grammarly
- Grammar and spelling checks
- Tone detection
- Plagiarism checker
- Generative AI co-creator
- Browser extension
QuillBot
- Paraphraser (7 modes)
- Summarizer
- Grammar checker
- Plagiarism checker
- Citation generator
Pros
Grammarly
- •Works everywhere you write
- •Highly accurate suggestions
- •Improves overall writing quality
- •Generative features are helpful
QuillBot
- •Best paraphrasing tool available
- •Extremely popular and trusted
- •Good free tier
- •Works across all writing tasks
Cons
Grammarly
- Premium plan is somewhat pricey
- Can be overly pedantic
- Generative features are basic compared to ChatGPT
QuillBot
- Output can sometimes lose nuance
- Plagiarism checker is weaker than Grammarly's
- Paraphrasing ≠ writing from scratch