QuillBot
AI paraphrasing, grammar correction, and summarization tools for students and writers.
QuillBot is the most widely used AI paraphrasing tool in the world, with over 35 million users. Unlike general writing assistants (ChatGPT, Claude), QuillBot is purpose-built for rewriting existing text, changing the phrasing while preserving the meaning. Students, content writers, and ESL speakers use it to rephrase sentences, avoid accidental plagiarism, and improve clarity.
What QuillBot Does
Paraphraser: The core product. Paste text; QuillBot rewrites it with different phrasing. Choose from modes:
- Standard (default rewording)
- Fluency (improves grammar and flow)
- Formal (professional register)
- Simple (plain language)
- Creative (more expressive variation)
- Expand / Shorten (adjust length)
- Academic (scholarly tone, Premium)
- Custom (set your own vocabulary percentage)
Grammar Checker: Real-time grammar and spelling corrections with detailed explanations. Integrates with Word, Google Docs, Chrome.
Summarizer: Condense long articles, papers, or documents to key points. Choose summary length.
Citation Generator: Academic citation formatting in APA, MLA, Chicago, and other styles.
Plagiarism Checker: (Premium) Check content against web sources. Powered by Turnitin.
Co-Writer: A combined editor with paraphraser, summarizer, grammar checker, and citation tools in one interface.
Translator: 30+ language translation.
Free vs. Premium
| Feature | Free | Premium ($9.95/month) |
|---|---|---|
| Paraphrasing limit | 125 words/attempt | Unlimited |
| Modes | Standard, Fluency | All 8 modes incl. Academic |
| Grammar checker | ✅ | ✅ |
| Summarizer | 1,200 words | Unlimited |
| Plagiarism checker | ❌ | ✅ |
| Citation generator | ✅ | ✅ |
| Freeze words | ❌ | ✅ |
| Custom mode | ❌ | ✅ |
The free tier at 125 words per paraphrase is frustrating for longer texts, you need to paste in chunks. Premium at $9.95/month removes limits and adds the Academic and Custom modes that matter most to the target audience.
Who QuillBot Is For
Students: The primary user base. QuillBot helps rephrase source material in research papers, avoids self-plagiarism, and assists ESL students in writing more naturally in English.
Content writers: Quickly rewrite AI-generated or templated text into varied phrasings. Reduce repetitive phrasing across high-volume content.
ESL professionals: Professionals working in a second language use QuillBot to refine phrasing and catch non-native patterns.
Editors: The grammar checker and fluency mode catch issues that standard spell-checkers miss.
QuillBot vs. Grammarly
Both improve existing writing but take different approaches:
| Factor | QuillBot | Grammarly |
|---|---|---|
| Primary function | Paraphrasing | Grammar/style correction |
| Where it works | Web app + browser | Everywhere you type |
| Free tier | 125-word paraphrasing | Full grammar checking |
| Premium cost | $9.95/month | $12/month |
| Best for | Rewriting text | Correcting your text |
They’re complementary, not competing. Many writers use Grammarly for real-time corrections and QuillBot when they want to rewrite a section they’re stuck on.
Academic Integrity Note
QuillBot is widely used by students for paraphrasing academic sources. Important considerations:
- Paraphrasing source material is legitimate academic practice when cited
- Using QuillBot to disguise AI-generated content as original work may violate academic policies
- Many institutions have policies on AI tool use, check before using in academic work
Verdict
The best paraphrasing tool available. The free tier’s word limit is limiting for serious use, but the browser integration and grammar checker make it more than just a paraphraser. Premium is reasonably priced for the capability. The Academic mode for formal scholarly writing is genuinely strong. Narrower use case than general AI writing tools, but best-in-class for what it does.
Frequently Asked Questions
Is QuillBot free? Yes, the free tier allows paraphrasing up to 125 words per attempt with Standard and Fluency modes. Premium ($9.95/month) removes limits, adds all 8 modes including Academic, and includes a plagiarism checker.
Is using QuillBot considered cheating? Paraphrasing properly cited source material is standard academic practice. Using QuillBot to disguise AI-generated content as your own original work may violate academic policies. Check your institution’s guidelines before using it for academic submissions.
How does QuillBot compare to Grammarly? They serve different purposes. QuillBot rewrites and paraphrases text. Grammarly corrects grammar and improves style in your existing writing. Many users use both: Grammarly for real-time corrections, QuillBot when they want to completely rephrase a section.
What languages does QuillBot support? QuillBot primarily excels in English. It offers translation for 30+ languages but the paraphrasing quality in non-English languages is significantly weaker than its English output.