Overview
QuillBot is a set of AI writing tools including a paraphraser, grammar checker, summarizer, AI detector, humanizer, plagiarism checker, translator and citation generator. It runs on the web and through browser extensions, desktop and mobile apps, and a Word add-in. Premium removes word limits and unlocks more paraphrasing modes and plagiarism checks.
Label: Vendor-described — Captured from the vendor's own materials. Not independently verified.
Best for
- Students and professionals rewriting, summarizing or grammar-checking text
- Business writers who want paraphrasing inside Chrome, Word or on mobile
Key features
- Paraphraser with multiple rewrite modes
- Grammar checker, summarizer and translator
- AI detector, plagiarism checker and citation generator
- AI humanizer and AI chat
- PDF tools including ChatPDF and converters
What it does
- Paraphraser with built-in and custom modes
- Grammar checker with tone insights
- Summarizer, translator and citation generator
- AI detector and AI humanizer
- Plagiarism checker (25,000 words/month on Premium)
- Browser extensions and apps for Chrome, Edge, Word and mobile
Use cases
Not mapped to a use case yet.
Drawbacks & cautions
- Free plan limits paraphrasing and humanizer to 100 words and 2 paraphrasing modes
- Plagiarism checking is not on the Free plan
- No API is offered
What users say
Trustpilot reviewers mostly praise QuillBot's paraphrasing and its ease of use, especially for academic writing. The complaints are mainly about free-tier limits, inconsistent AI-detection results and some renewal charges. G2 rates it well, but the page showed no review text.
What people like
- Paraphrasing and simplifying complex text works well and saves time uk.trustpilot.com
- Simple, user-friendly interface uk.trustpilot.com
- Useful for academic writing, research and assignments uk.trustpilot.com
Common complaints
- Free-tier limits push users to pay, which frustrates students in particular uk.trustpilot.com
- AI detector and humanizer results are seen by some as inconsistent uk.trustpilot.com
- Occasional reports of unexpected auto-renewal charges uk.trustpilot.com
Scores are shown as each site published them on the date checked. They come from those sites' reviewers, not from us, and they never affect our rankings. Ratings based on fewer than 10 reviews are left out. The summaries are our own words, gathered Oct 22, 2026; follow the links to read the reviews.
Alternatives
- ChatGPT — General-purpose AI chat assistant for writing, research, analysis, images and coding
- Copy.ai — GTM AI platform for sales and marketing workflows, agents, chat and content creation
- Grammarly — AI writing assistant for proofreading, tone, rewrites and text generation across apps
- ProWritingAid — Grammar checker and manuscript editing tool with style reports, rephrasing and story critique
Evidence
| Fact | Label | Source | Observed |
|---|---|---|---|
| hasApi | Vendor-described | help.quillbot.com | Oct 17, 2026 |
| pricing | Vendor-described | quillbot.com | Oct 17, 2026 |
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