Quick Answer
Choose Grammarly if: you want a comprehensive writing assistant that improves grammar, style, tone, and clarity across everything you write — emails, documents, social media, all in one.
Choose QuillBot if: your primary need is paraphrasing — rewriting sentences or paragraphs in different ways while preserving meaning. It's the best paraphrasing tool available.
Use both if: you're a student or researcher who needs QuillBot's paraphrasing for summarizing sources AND Grammarly's grammar checking for polishing final work.
Side-by-Side Comparison
| Feature | Grammarly | QuillBot |
|---|---|---|
| Price (Premium) | $12/month (annual) | $8.33/month (annual) |
| Grammar Check | Best in class | Basic |
| Paraphrasing | Limited | Best in class |
| Tone Detection | Yes — detailed | No |
| Plagiarism Check | Yes (Premium) | Yes (Premium) |
| Summarizer | No | Yes |
| Browser Extension | Works everywhere | Limited |
| AI Writing Generation | Yes (Grammarly GO) | Basic |
| Free Plan | Yes | Yes |
Grammar and Style Checking
Grammarly wins this category comprehensively. Its grammar detection catches subtle errors that QuillBot misses entirely — misplaced modifiers, subject-verb agreement in complex sentences, comma splice issues. For anyone whose primary goal is writing correctly, Grammarly is the clear choice.
Paraphrasing
QuillBot wins here — it's built specifically for this. It offers multiple paraphrasing modes (Standard, Fluency, Creative, Formal, Academic, Simple) that produce genuinely different rewrites while preserving meaning. Students use this to understand source material better and rephrase ideas in their own voice. Grammarly's rephrasing is one-dimensional by comparison.
Who Uses Each Tool?
Grammarly's user base skews toward professionals, marketers, and anyone writing in a business context. QuillBot is extremely popular with students and academic writers who need to paraphrase research sources and academic papers.
Both tools offer free plans that are genuinely useful, making it feasible to use both without paying for either.
Can You Use Both?
Yes — and many people do. A common workflow: use QuillBot to paraphrase source material when writing research papers, then run the final document through Grammarly to catch any grammar issues before submission. They complement each other rather than overlap significantly.
Try Both Free
Both have strong free plans. Start free and upgrade only if you need more.
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