Grammarly, Inc. · Writing
Grammarly checks grammar, clarity, and tone across the web and now offers generative AI assistance.
Pricing
Free - $12/month
Trust 93
Writing
QuillBot
AI paraphrasing and grammar checking tool used by students and professionals for writing improvement.
What’s good
- Good paraphrasing
- Multiple modes
- Free tier
Where it falls down
- Academic focus
- Can feel formulaic
- Limited free features
Features
Paraphrasing
Grammar check
Summarizer
Citation generator
Alternatives
Others doing the same job
Visit
Grammarly · Writing
AI-powered writing assistant providing grammar, tone, and clarity suggestions with generative AI text rewriting.
Pricing
Free - $30/month
Trust 91
Copyleaks · Writing
Copyleaks detects plagiarism and AI-generated content across languages with enterprise and LMS integrations.
Pricing
Free - $9.99/month
Trust 90
Plus · Writing
Plus AI is an add-on that generates and edits AI presentations directly within Google Slides and PowerPoint.
Pricing
$10-$21/month
Trust 89
Cost against price
QuillBot costs $20. What does it cost to run?
We do not know which model QuillBot runs on, so here is the range. One seat doing the light workload, on the cheapest, middlemost and dearest models in the index.
| If it runs on | Model | Model cost | Left of $20 |
|---|---|---|---|
| Cheapest priced model | Qwen 3.7 Flash | $0.13 | $20 (99%) |
| Middle of the range | Gemini 3.1 Pro | $11 | $9.44 (47%) |
| Dearest priced model | Claude Fable 5 | $48 | $-28.00 (-140%) |
A model, not an audit. This is what the intelligence would cost at that shape of work, not what QuillBot pays: we do not know its model, its real usage or what it has negotiated, and the figures exclude caching, batching and volume discounts. What the gap is worth is the product, and that is the thing to judge.
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