QuillBot AI
QuillBot is an AI-powered writing assistant used by over 35 million people — primarily as a paraphrasing tool, but also covering grammar checking, summarizing, citation generation, and plagiarism detection. It's the dominant tool for students and writers who need to rephrase content while keeping the original meaning intact. The browser extension and Microsoft Word / Google Docs integrations make it work wherever you write.
How to Get the Most Out of QuillBot AI
Use the Right Paraphrasing Mode for Your Goal
QuillBot Premium offers 8 paraphrasing modes, and choosing the right one matters more than most users realize. Fluency — the default — corrects errors while making minimal changes, best for polishing your own writing. Standard restructures sentences more aggressively. Formal elevates tone for professional documents. Creative makes the most dramatic changes and is best when you need output that sounds genuinely different from the source. Free users have access to Standard and Fluency only — if you're hitting the limits of those two, Premium's Creative and Expand modes are the main reasons to upgrade.
Use the Synonym Slider and Word-Level Control
After QuillBot paraphrases your text, hover over any word it changed and you'll see a dropdown of alternatives it considered. This word-level control is QuillBot's most underused feature. When the paraphrase isn't quite right — the word choice feels off, the sentence is technically correct but awkward — clicking individual words lets you swap to a synonym that fits better without rerunning the whole paraphrase. The synonym slider (1 to 7) also controls how aggressively it replaces vocabulary across the whole passage. Starting at 3-4 for most tasks keeps output natural; 6-7 for maximum divergence from the original.
Install the Chrome Extension for In-Context Editing
QuillBot's Chrome extension lets you paraphrase text directly in Gmail, Google Docs, LinkedIn, and virtually any web text field — select text, right-click, and choose QuillBot. This is significantly faster than copying content to the QuillBot website and back. The Microsoft Word and Google Docs add-ins work similarly: highlight a passage, click QuillBot in the sidebar, and replace in one step. For anyone writing in these environments daily, the add-in integration is the real workflow advantage over just using the website.
Use Summarizer for Research and Note-Taking
QuillBot's Summarizer can condense articles, papers, and reports into key points or a concise paragraph. Paste an article up to 6,000 words (Premium) or 1,200 words (free) and choose between Key Sentences mode (extracts the most important sentences verbatim) or Paragraph mode (generates a summary in QuillBot's own words). For researchers and students reading large volumes of material, running each source through QuillBot Summarizer before deciding whether to read fully is a practical time-saver. Key Sentences mode is more reliable for academic use because it doesn't fabricate — it only pulls from what's in the text.
The Plagiarism Checker Limitation to Know
QuillBot Premium includes plagiarism checking — but it's powered by Copyleaks and has a limit of 20 pages per month. This is adequate for individual assignment checking but insufficient for professionals who need to check large volumes of content. For that volume, a dedicated tool like Turnitin or Grammarly's plagiarism checker (unlimited on Business plan) is more practical. That said, for students checking their own work before submission, QuillBot's built-in checker covers the use case without needing a separate subscription.
Our Take
QuillBot occupies a specific and genuinely useful niche — it's the best tool available for paraphrasing and light rewriting at speed. The synonym control and multiple modes give more fine-grained control than simply asking ChatGPT to "rewrite this." That said, for complex rewriting tasks where you want the output to sound completely different from the source, Claude or ChatGPT will generally produce more natural, varied results. QuillBot's strength is in volume and workflow integration: the Chrome extension and Word/Docs add-ins make it genuinely faster than copying text into a separate AI chatbot. For students and professionals who frequently need to rephrase, the free tier covers casual use and Premium justifies itself for heavy daily use. It's not a replacement for more powerful AI writing tools — it's a complement to them.
- Best-in-class paraphrasing with word-level control
- 8 paraphrasing modes (Premium) covering every tone and style
- Chrome extension + Word + Google Docs integration
- Free tier is genuinely useful for occasional use
- Summarizer works reliably on long-form content
- Citation generator supports APA, MLA, Chicago styles
- Used by 35M+ users — well-established reliability
- Free tier: 125-word paraphrasing limit per pass
- Plagiarism checker capped at 20 pages/month (Premium)
- Not a content generator — only reworks existing text
- Creative mode sometimes produces unnatural phrasing
- No chat interface or conversation memory
- For complex rewrites, ChatGPT/Claude produce better results
| Tool | Best for | Free tier | Starting price |
|---|---|---|---|
| QuillBot | Paraphrasing, volume rewriting, Word/Docs integration | ✓ (125 words) | $8.33/mo (annual) |
| Grammarly | Grammar, tone, real-time suggestions everywhere | ✓ | $12/mo (Premium) |
| Wordtune | Sentence-level rewrites with multiple variations | ✓ (10/day) | $9.99/mo |
| Claude | Complex rewrites, tone transformation, long documents | ✓ (daily cap) | $20/mo (Pro) |
| ChatGPT | Versatile rewriting with instruction control | ✓ | $20/mo (Plus) |
- • Students who need to paraphrase research without copy-pasting
- • Content marketers repurposing existing material at scale
- • Non-native English speakers polishing written work
- • Professionals summarizing long reports quickly
- • Anyone who already writes in Word or Google Docs and wants AI in their existing workflow
- • Writing original content from scratch (use ChatGPT or Claude)
- • Professional writers who need complex tonal transformation
- • Developers or technical users (no API, limited automation)
- • Heavy plagiarism checking needs (>20 pages/month)
- • Teams who need advanced analytics or brand voice training