QuillBot Review
All-in-one AI writing suite trusted by 35M+ writers for paraphrasing, grammar, plagiarism detection, and content creation
QuillBot is the most widely adopted writing assistant in its class for good reason: the free tier is genuinely useful, the Premium plan is priced lower than most competitors, and the paraphrasing engine remains best-in-category for rewording without gutting meaning. Where it falls short is in original content generation and API access. It is a refiner and improver first, a creator second. If you write a lot and need to polish, rephrase, check plagiarism, and humanize AI output in one place, QuillBot delivers more per dollar than almost anything else. If you need a blank-page content generator, tools like Jasper or Anyword are better fits.
Pros and cons
- Free tier is substantive: 125-word paraphrasing, grammar checking, basic AI detection, and 20 AI chats per day at no cost
- Premium at roughly $9-10 per month annually is among the lowest prices for a full AI writing suite with unlimited paraphrasing
- Chrome extension rated 4.7 with 6M+ active users, works across Gmail, Google Docs, LinkedIn, and almost any web textarea
- Plagiarism checker, AI detector, and AI humanizer all bundled into one subscription with no add-on fees
- 10+ paraphrasing modes including Academic, Formal, Creative, and Custom modes you define yourself
- Team plan adds usage metrics and centralized billing without requiring enterprise-tier pricing conversations
- No public developer API for programmatic access, limiting use in automated content pipelines
- AI content generation (Chat, Image Generator) is secondary to refinement tools and lags behind dedicated generation platforms
- Free plan limits Summarizer to 1,200-word inputs and AI Chat to 20 conversations per day, pushing power users to paid quickly
- Pricing shown in EUR on the premium page with no clear USD equivalent upfront, which creates friction for US buyers
- No native integrations with CMS platforms like WordPress or HubSpot beyond browser extensions
What is QuillBot?
QuillBot is an AI writing platform built around a core use case that most other tools treat as secondary: making existing text better. Its paraphraser, grammar checker, plagiarism detector, and AI humanizer all operate on what you have already written, helping you rephrase, clarify, verify, and polish. The platform has grown to over 35 million users, which places it among the largest AI writing tools by active user count.
The tool suite has expanded beyond its paraphrasing roots to include an AI Chat (similar to ChatGPT for brainstorming and drafting), an AI Image Generator, a Presentation Creator, a Summarizer, a Citation Generator, and a suite of PDF and file converter tools. The full suite is available in a single subscription, which makes the per-feature cost significantly lower than assembling these capabilities from separate tools.
QuillBot is a Learneo product, the same parent company behind Course Hero and Scribbr, giving it institutional backing in the education and academic writing space. That heritage shows: the plagiarism checker supports 100+ languages, the citation generator handles multiple style formats, and the AI Detector is calibrated toward academic integrity use cases. For students, researchers, and professional writers who need to verify and strengthen their writing, the platform covers more ground in one login than most competitors.
Core features
Paraphraser with 10+ Modes
The paraphraser is QuillBot's flagship feature and what most users come for. Paste in text and choose from Standard, Fluency, Academic, Simple, Creative, Formal, Expand, Shorten, or a Custom mode you define yourself. Each mode rewrites for a different purpose without changing the core meaning. Premium unlocks unlimited input length, all built-in modes, and the ability to save and reuse custom modes. The free tier caps at 125 words, which is enough for a paragraph but not a full article.
Grammar Checker with Advanced Recommendations
Beyond correcting typos and punctuation, the Premium grammar checker identifies passive voice, wordiness, clarity issues, and tone mismatches. It supports grammar correction in 6 languages. Free users get basic error correction; Premium users get the full suggestion set including structural recommendations. If you write in a second language or need to match a specific professional register, the advanced suggestions make a real difference.
Plagiarism Checker and AI Detector
Both tools are included in Premium at no extra cost. The plagiarism checker analyzes text against web sources in 100+ languages and is designed for academic and professional integrity verification. The AI Detector identifies AI-generated content and is particularly useful for editors, educators, and content managers reviewing submissions. Free users get limited AI Detector access; Premium users get unlimited checks. There is also an AI Humanizer that rewrites AI-generated text to read more naturally, with tone insights and history on Premium.
AI Chat and Image Generator
The AI Chat interface supports brainstorming, drafting, Q&A, and research assistance, similar to a general-purpose large language model interface but embedded in the QuillBot workflow. Free users get 20 chats per day; Premium users get unlimited. The Image Generator produces images from text prompts, with 3 images per day on the free plan and 300 per month on Premium. Neither tool is the primary reason to choose QuillBot, but having both bundled into the same subscription removes the need for a separate AI chat subscription.
Chrome Extension and Cross-Platform Apps
The Chrome extension is one of the highest-rated writing extensions available, with a 4.7 rating across 6 million users. It brings the paraphraser, grammar checker, and other tools directly into Gmail, Google Docs, LinkedIn, Notion, and virtually any web text field. QuillBot also offers extensions for Edge and Safari, a Word add-in, macOS and Windows desktop apps, and iOS and Android keyboard apps, making it one of the most broadly available writing tools across platforms.
Summarizer and Citation Generator
The Summarizer condenses articles, papers, and documents into key points, with a 1,200-word limit on free and 6,000 words on Premium. Custom summary creation is a Premium feature. The Citation Generator creates and formats citations across standard academic styles, which is directly useful for students and researchers who need accurate references without manual formatting. Both tools are included in all plans.
Pricing
| Feature | Free $0/mo | Premium ~$9.95/mo (billed annually) | Team Plan Contact for pricing |
|---|---|---|---|
| Paraphrasing | Up to 125 words | Unlimited | Unlimited |
| Paraphrase modes | Standard & Fluency | 9 modes + Custom | 9 modes + Custom |
| Grammar checker | Basic corrections | Advanced recommendations | Advanced recommendations |
| Plagiarism checker | ✗ | 25,000 words/month | 25,000 words/month |
| AI Detector | Limited access | Unlimited | Unlimited |
| AI Humanizer | 125 words, 6 uses/day | Unlimited + insights | Unlimited + insights |
| Summarizer input | 1,200 words | 6,000 words | 6,000 words |
| AI Chat | 20 chats/day | Unlimited | Unlimited |
| Image Generator | 3 images/day | 300 images/month | 300 images/month |
| Document storage | 10 MB | 100 MB | 100 MB |
| Chrome & browser extensions | ✓ | ✓ | ✓ |
| Desktop & mobile apps | ✓ | ✓ | ✓ |
| Team usage metrics | ✗ | ✗ | ✓ |
| User management dashboard | ✗ | ✗ | ✓ |
| Centralized billing | ✗ | ✗ | ✓ |
| Priority support | ✗ | ✓ | ✓ |
Who it is for
Anyone writing papers, essays, or research who needs to paraphrase sources without plagiarizing, check citations, verify originality, and clean up grammar across drafts. QuillBot's academic heritage (shared with Course Hero and Scribbr) makes it well-suited to this use case, and the free plan covers the basics for light usage before requiring a Premium upgrade.
A writer producing blog posts, social media content, or marketing copy who needs to rephrase client materials, catch grammar issues, and humanize AI-generated drafts before delivery. The Premium plan at roughly $10 per month is low enough that the time saved on a single revision pass pays for the subscription.
Someone in a non-writing role, such as a manager, analyst, marketer, or business owner, who writes emails, reports, presentations, and social posts regularly but does not think of themselves as a writer. The Chrome extension brings QuillBot into every tool they already use, and the all-in-one Premium subscription removes the need to juggle separate grammar, paraphrasing, and plagiarism tools.
Verdict
QuillBot earns its 35 million user count by doing the unglamorous work of writing extremely well: paraphrasing, grammar checking, originality verification, and humanizing AI text. The free plan is one of the most generous in the category. Premium is affordable enough that it rarely needs justification. The gap is at the high end: no developer API, limited original content generation, and no CMS integrations mean it does not fit into automated content pipelines or agency-scale workflows. For individual writers, students, and professionals who write every day, it is the most cost-effective all-in-one writing assistant available.
Frequently asked questions
Is QuillBot free to use?
Yes, QuillBot has a free plan that includes paraphrasing of up to 125 words, basic grammar checking, limited AI detection, 20 AI chats per day, 3 image generations per day, and access to all browser extensions and apps. The free plan is functional for light use. Heavy users will hit limits quickly, especially on paraphrasing and Summarizer input length.
How much does QuillBot Premium cost?
QuillBot Premium is priced in EUR at €8.33 per month when billed annually, which equates to roughly $9-10 per month in USD depending on exchange rates. Monthly billing is available at a higher rate. A 14-day money-back guarantee applies to new Premium subscriptions. There is no free trial in the traditional sense, but the free plan lets you test core features before upgrading.
What is QuillBot's Team Plan?
The Team Plan extends Premium features to groups with added team management capabilities: a user management dashboard, centralized billing, team usage metrics, data control, and priority account management support. Pricing is not listed publicly and requires contacting QuillBot directly. It is designed for companies and academic institutions managing writing assistance across multiple users.
Does QuillBot have an API?
QuillBot does not offer a public developer API for programmatic access to its tools. If you need to integrate paraphrasing or grammar checking into a custom application or content pipeline, QuillBot is not the right tool. Browser extensions and the Word add-in are the main integration paths available.
How does QuillBot handle privacy and data security?
QuillBot is a Learneo product and operates under Learneo's privacy policy and trust center. The platform uses cookies for analytics and personalization. For academic and enterprise users who need specific data handling guarantees, reviewing the Trust Center at quillbot.com before subscribing is recommended. QuillBot does not have published SOC 2 or ISO 27001 certifications in the way some enterprise writing tools do.
Can QuillBot detect AI-generated content?
Yes. QuillBot includes an AI Detector that identifies AI-written text. Free users get limited access; Premium users get unlimited AI detection checks. QuillBot also offers an AI Humanizer that rewrites AI-generated content to read more naturally, with Tone insights and usage history available on Premium plans. Both tools are particularly useful for educators and editors reviewing submitted content.