QuillBot vs Writefull
A detailed comparison to help you choose between QuillBot and Writefull.
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Verdict: Writefull wins
Writefull scores 4.1/5, edging out QuillBot at 4.0/5. Non-native and native English-speaking researchers and students who want AI language feedback tuned to scientific manuscripts inside Word or Overleaf.
QuillBot AI paraphrasing and writing tools | Writefull AI language feedback for academic writing | |
|---|---|---|
| Rating | 4.0 (1 review) | 4.1 (1 review) |
| Pricing Model | freemium | freemium |
| Starting Price | Free tier available | Free tier available |
| Best For | Students, non-native English speakers and working writers who spend their day rewriting and polishing existing text. | Non-native and native English-speaking researchers and students who want AI language feedback tuned to scientific manuscripts inside Word or Overleaf. |
| Free Tier | ||
| API Access | ||
| Team Features | ||
| Open Source | ||
| Tags | free tierbrowser extension | free tier |
| Visit QuillBot → | Visit Writefull → |
QuillBot
Pros
- + Paraphrase quality held meaning while varying syntax across my academic and marketing samples — better at this than any general chat assistant I tested
- + The synonym-density slider gave real control: minimal for safe close rewrites, maximum for novelty
- + Premium at $8.33/month billed annually ($99.95/year per QuillBot's FAQ) brings nine modes, 23-language paraphrasing and a 25,000-word/month plagiarism checker
- + Citation Generator (MLA/APA/Chicago) plus the Summarizer make it a genuine student workflow, not just a rewriter
- + Free tier is honest about its caps and the browser extension covers the everyday check-and-fix loop
Cons
- - Free caps (100 words per paraphrase, two modes) make serious use a Premium purchase
- - Technical and domain phrasing occasionally came back wrong-but-pretty in my tests — output needs reading, not trusting
- - Not a long-form generator: the AI Writer/Chat are accessories and the Summarizer caps at 6,000 words on Premium
- - The AI Detector/Humanizer pairing is both a proofreading convenience and the toolkit for disguising generated work — poor evidence for integrity decisions
- - Monthly billing at $19.95 (third-party-confirmed) is more than double the annual rate; the real price is a yearly commitment
Writefull
Pros
- + Trained on scientific text: in my testing it flagged three real grammar errors in a dense methods paragraph and raised zero false alarms on standard statistics shorthand
- + Language search returns example sentences from published papers — genuinely useful for choosing between two plausible phrasings
- + Lives where academics write: Word add-in and deep Overleaf integration (including AI Assist distribution via Digital Science)
- + Academic-specific widgets general tools lack: abstract generator, title generator, Supercomplete context completion
- + Free tier by default with a real annual option at $65.52/year at time of writing per writefull.com/pricing
Cons
- - English-only — its own models do not cover other languages
- - Revise and Cite come only with institutional licences, so individuals cannot get the complete suite
- - Published pricing is a time-limited launching offer (33% off); the stable rate is not yet established
- - Paraphrase suggestions occasionally flattened technical phrasing in my testing — batch-accepting them is a mistake
- - Billing runs through Gumroad, which surprises people checking their bank statement
Frequently Asked Questions
Which is better, QuillBot or Writefull?▼
Writefull scores higher at 4.1/5 vs 4.0/5 for QuillBot, making it the better-rated option in our comparison.
What is the difference between QuillBot and Writefull?▼
QuillBot: QuillBot is an AI writing assistant best known for paraphrasing, alongside grammar checking, summarising and citation tools. It is widely used by students and writers. Writefull: Writefull gives researchers and students AI feedback on academic writing: proofreading, paraphrasing and copy-editing, with widgets and versions for institutions and publishers.
Is QuillBot or Writefull more affordable?▼
QuillBot starts at €0/mo, Writefull starts at €0/mo. Check the comparison table above for current pricing.
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