Last updated: 2026-08-19
QuillBot is an AI writing assistant with paraphrasing across 23 languages, alongside grammar checking, summarizing, and plagiarism and AI detection. Its differentiator is combining rewriting, originality checks, and AI-content humanizing in one toolkit, instead of specializing narrowly in grammar correction the way Grammarly does.
About QuillBot
QuillBot launched in 2017 and has raised $4.28M in funding. It centers on a paraphraser with multiple rewriting modes, including Standard, Fluency, Formal, Simple, and Creative, that rewrites text while preserving meaning. Grammar checking, summarizing, plagiarism detection, an AI detector, and a citation generator round out the toolkit.
Newer additions include an AI Chat assistant, an AI Image Generator, an AI Humanizer for rewriting AI-generated text, and a presentation builder. QuillBot works in 23 languages, with browser extensions for Chrome, Edge, and Safari plus a Microsoft Word integration and native iOS and Android apps.
Pricing
Free tier with unlimited basic paraphrasing (125 words per use) and core tools. 33/mo). edu verification.
50/user/month with volume discounts.
| Tier | Monthly price | What it includes |
|---|---|---|
| Free | Free | No cost |
| Premium Annual | $8.33/mo | $99.95/year |
| Premium Quarterly | $13.31/mo | $39.95 every 3 months |
| Premium Monthly | $19.95/mo | $19.95/month |
Feature Comparison by Tier
| Feature | Free | Premium Annual | Premium Monthly | Premium Quarterly |
|---|---|---|---|---|
| Paraphrasing | Limited (125 words/use) | Unlimited | Unlimited | Unlimited |
| Paraphrasing Modes | Standard Only | All 10+ Modes | All 10+ Modes | All 10+ Modes |
| Grammar Checker | Basic | Advanced | Advanced | Advanced |
| Plagiarism Detection | — | 25,000 words/month | 25,000 words/month | 25,000 words/month |
| AI Detection & Humanizer | — | ? | ? | ? |
| AI Chat & Image Gen | — | ? | ? | ? |
| Multiple Language Support (23) | ? | ? | ? | ? |
| Browser Extensions | ? | ? | ? | ? |
Key Features
- Advanced Paraphraser: 10+ writing modes (Standard, Fluency, Formal, Creative, Academic, Simple, Expand, Shorten, Custom) with unlimited paraphrasing at premium tier and adjustable synonym strength
- Full Grammar Checker: Real-time detection and correction of grammar, spelling, punctuation, and style issues with explanations and examples
- Plagiarism Detection: Scans content against online sources to detect plagiarism and ensure originality up to 25,000 words per month for premium users
- AI Detection & Humanization: Identifies AI-generated text and humanizes it to sound more natural and human-like while preserving meaning
- AI Chat & Content Generation: Conversational AI assistant for brainstorming, writing, research, and image generation with real-time web search and citations
- Multi-Platform Integration: Native extensions for Chrome, Edge, Safari, Firefox, Word add-in, and desktop apps for Windows and macOS, plus iOS and Android keyboard apps
Pros
- Paraphrasing quality and the range of rewriting styles are the main reason reviewers pick QuillBot over grammar-only tools.
- Annual billing works out cheaper per month than Grammarly's closest comparable plan, per HokAI's own pricing comparison.
- The free tier includes real paraphrasing and grammar checking, not just a crippled trial.
- Working everywhere from a browser extension to a Word add-in to a mobile keyboard means less copy-pasting between apps than most single-platform competitors.
- Bundling a paraphraser, grammar checker, plagiarism checker, and AI detector under one subscription replaces several separate tools.
Cons
- The free tier's per-rewrite word cap makes it impractical for pasting in a long document at once.
- The AI Humanizer is only 40-60% effective at helping text evade AI detectors in real-world testing.
- The grammar checker is less advanced than specialized tools like Grammarly for complex sentence-level analysis.
- AI detection results are occasionally inconsistent, with false positives on text a human actually wrote.
- Context understanding is limited for highly technical or specialized subject matter.
Product Information
- Cloud
- Yes
- Self-Hosted
- No
- On-Premise
- No
- Languages
- English, Spanish, French, German, Italian, Portuguese, Dutch, Russian, Chinese, Japanese, Korean, Arabic, Bengali, Hindi, Thai, Turkish, Vietnamese, Polish, Swedish, Norwegian, Danish, Finnish, Ukrainian
- Training
- Documentation, Video Tutorials, Browser Extension Guides, Help Center Articles, Email Support
Frequently Asked Questions
What does QuillBot actually cost?
Premium is $19.95 monthly. Buying three months at a time works out to $13.31 a month, and a year at a time to $8.33. Students verified with a .edu address pay $6.25 a month, and team plans open at $7.50 for each user monthly with volume discounts above that.
Can you use QuillBot without paying?
Yes. The free plan covers core paraphrasing capped at 125 words per rewrite, plus basic access to the grammar checker and other tools. Upgrading to Premium removes that word limit and unlocks every paraphrasing mode, the AI detector, AI Humanizer, and presentation builder.
What should you use instead of QuillBot?
Grammarly is the top pick if you want tone and clarity feedback built into more apps, even though it costs more per year. Language Tool suits anyone who wants free, open-source grammar checking without a paraphrasing suite. Copy.ai fits better if your priority is generating new marketing copy rather than refining text you already wrote.
What separates QuillBot from Grammarly?
QuillBot centers on paraphrasing, plagiarism detection, and AI-content humanizing, while Grammarly focuses on grammar, spelling, and tone correction built into over 1 million apps. QuillBot's annual plan runs about 58% cheaper than Grammarly's comparable tier.
How long does it take to get going with QuillBot?
A rewrite comes back in seconds. Setup is a free account at quillbot.com or the Chrome, Edge, or Safari extension, and the free paraphrasing tool asks for no payment details. Paste or type text into the editor, then move to Premium if unlimited word counts or the AI detector become necessary.
Top Alternatives
- Grammarly: Grammarly integrates tone and clarity feedback across apps; QuillBot makes paraphrasing the core feature.
- Language Tool: Language Tool is the open-source grammar option, while QuillBot bundles paraphrasing, plagiarism checks, and AI tools together.
- Copy.ai: Copy.ai generates marketing copy; QuillBot refines, checks, and validates writing you already have.
- Jasper: Jasper handles long-form content creation, while QuillBot covers paraphrasing, plagiarism detection, and refinement.
- Sudowrite: Sudowrite is built for creative writing and editing; QuillBot is the broader toolkit with paraphrasing and plagiarism detection.
HokAI guides covering QuillBot
- Best AI for University Assignments in 2026: The best AI for university assignments isn't one chatbot: QuillBot, Humata AI, NotebookLM, ChatGPT and Grammarly each cover a different stage, priced for 2026.
- Best AI Writing Assistant in 2026: How to Actually Choose: Grammarly, Wordtune, QuillBot and 6 more AI writing assistants compared for 2026, with the criteria to use once you stop trusting the shortlist alone.