QuillBot and Grammarly both promise better writing, both have free plans, and both now include AI rewriting. So people often assume they’re interchangeable. They aren’t. Grammarly is built to edit what you write as you type. QuillBot is built to rework text that already exists: paraphrasing, summarizing, and changing tone.
This comparison is based on each vendor’s published plans and documentation as of October 2026, not hands-on testing.
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The Short Answer
- Choose Grammarly if you write a lot of original, client-facing text (emails, proposals, posts) and want suggestions everywhere you type.
- Choose QuillBot if you mostly rework existing text, such as rewording a paragraph, simplifying a dense document, or summarizing research, and you want the lower price.
- Use both free plans if you’re unsure. Many people do, because the tools overlap less than you’d think.
Pricing at a Glance
As of October 2026. Check each vendor’s pricing page before you buy.
| QuillBot | Grammarly | |
|---|---|---|
| Free plan | Yes, with limits on paraphrasing modes and length | Yes: core spelling and grammar fixes, 100 AI prompts a month |
| Paid plan | Premium, billed monthly, quarterly, or annually; sources we checked put it at roughly $8–10 a month on annual billing | Pro: $12 per member per month billed annually; Grammarly’s support pages list higher monthly and quarterly rates |
| Teams | Team options available; check QuillBot’s site | Pro covers up to 149 seats; Enterprise for larger organizations |
| Payment options | Card or PayPal, per QuillBot | Card; check Grammarly’s site for others |
On annual billing, QuillBot Premium is usually the cheaper of the two.
What QuillBot Does Best
QuillBot started as a paraphraser and still leads with it.
- Paraphrasing in 10+ modes. QuillBot says Premium unlocks more than ten rewriting styles, from academic to simple, so you can rewrite the same paragraph in different tones.
- Summarizer. Condense long articles or reports into key points.
- Grammar checker, plagiarism checker, and AI detector. According to QuillBot, Premium includes plagiarism checks of up to 25,000 words a month plus its AI detector and “humanizer.”
- Pause instead of cancel. QuillBot lets you pause a Premium subscription, for example over a summer break, without being billed.
Best for: students, researchers, content marketers repurposing material, and non-native English speakers who want several ways to phrase the same idea.
Use it responsibly: paraphrasing someone else’s work without credit is still plagiarism, and many schools and clients have rules about AI tools. Cite sources and check the policies that apply to you.
What Grammarly Does Best
Grammarly is an editor that sits in your browser, email, and documents.
- Inline suggestions everywhere. Spelling, grammar, clarity, and tone suggestions appear as you type across most apps and websites.
- Full-sentence rewrites and tone tools on Pro. Pro adds rewrites for clarity and fluency, plus brand and audience voice tools.
- Generative AI prompts. Free includes 100 AI prompts a month; Pro raises that to 2,000 per member per month.
- Plagiarism and AI-text detection on Pro.
Best for: freelancers, consultants, and small-business owners who write a lot of original text and want a second pair of eyes on everything.
For a deeper look, read our Grammarly Review.
Head-to-Head Comparison
| Task | Better pick | Why |
|---|---|---|
| Catching typos and grammar while you write | Grammarly | Works inline across apps |
| Rewording a paragraph several ways | QuillBot | Paraphrasing modes are its core feature |
| Summarizing a long document | QuillBot | Dedicated summarizer |
| Matching a brand tone across a team | Grammarly | Brand and audience voice tools on Pro |
| Plagiarism checks | Tie | Both include them on paid plans |
| Lowest price for a paid plan | QuillBot | Usually cheaper on annual billing |
Privacy: Check Before You Paste Client Work
Both tools process your text on their servers. Before you paste confidential client material, check each vendor’s privacy and data settings. Grammarly lets individual accounts turn off “Product Improvement and Training” in privacy settings. For QuillBot, read its privacy policy and account settings for how your text is stored and used. Our Are AI Tools Safe for Business Data? guide has a checklist.
Can a Chatbot Replace Both?
Partly. ChatGPT, Claude, and Gemini can paraphrase, summarize, and edit if you give them clear instructions, and their free plans are generous. What they don’t do as well is sit inline in every text box as you type, which is Grammarly’s strength, or give one-click rewriting modes, which is QuillBot’s. If you already pay for a chatbot, try it for a week before adding either tool. Our How to Write Better AI Prompts guide includes editing templates.
Quick Decision Checklist
- [ ] Do you mostly write new text? Start with Grammarly Free.
- [ ] Do you mostly rework or summarize existing text? Start with QuillBot Free.
- [ ] Hitting the free limits weekly? Upgrade the one you use most.
- [ ] Handling client or confidential documents? Check privacy settings first.
- [ ] Students: check your school’s rules on AI and paraphrasing tools.
FAQ
Is QuillBot better than Grammarly?
Neither is better overall. They solve different problems. QuillBot rewrites and summarizes; Grammarly edits as you type.
Does QuillBot have a grammar checker?
Yes. QuillBot includes a grammar checker, but Grammarly’s inline editing across apps is more central to its product.
Can I use QuillBot and Grammarly together?
Yes. A common workflow is to paraphrase or summarize with QuillBot, then polish the final text with Grammarly.
Will paraphrased text pass AI detectors?
There’s no guarantee, and you shouldn’t rely on tools to disguise AI or copied text. Use paraphrasing to improve your own writing, and credit your sources.
Related Reading
- The full toolkit: The Best AI Writing Tools for Small Businesses and Freelancers
- Editing in depth: Grammarly Review
- Better results from any tool: How to Write Better AI Prompts
Prices and features change often. Everything here is as of October 2026, so check the vendor’s site before you buy. This article is general information, not professional advice.
