Last updated: 2026-11-02
QuillBot is an AI writing toolkit from Learneo, built around a paraphraser that rewrites text in 23 languages, with grammar, plagiarism, AI-detection, humanizing and summarizing tools beside it. QuillBot says more than 35 million writers use it each month, through its web editor, browser extensions, Word add-in and phone keyboards.
About QuillBot
QuillBot began in 2017 in a University of Illinois dorm, where Anil Jason, Rohan Gupta and David Silin built a paraphraser to help English-language learners write. It joined Learneo, the company formerly called Course Hero, in 2021, and is now led by CEO Andrew Grauer. QuillBot's about page puts its staff at 225 people.
The paraphraser is still the centre of the product. Premium unlocks nine built-in rewriting modes, from Standard and Fluency to Academic and Simple, plus unlimited custom modes, a synonym slider and paraphrasing in 23 languages. Around it sit a grammar checker that works in six languages, a plagiarism checker, an AI Detector and an AI Humanizer that QuillBot still labels beta, a summarizer, a citation generator, translation into more than 40 languages, AI Chat and an image generator. Documents can be saved in QuillBot Flow, its writing workspace.
It runs in the browser and as extensions for Chrome, Edge and Safari, an add-in for Microsoft Word, desktop apps for Windows and macOS, and iOS and Android apps whose keyboard rewrites text inside other apps. Learneo also owns LanguageTool, so two grammar products sit in the same family.
QuillBot sits in the AI writing assistants category beside Grammarly, Wordtune, ProWritingAid, plus long-form generators like Jasper. For students, the best AI for university assignments guide compares it with the alternatives, and the best AI writing assistant roundup covers the wider field. Coursework readers can also see where it lands in best AI to use for school and best AI for writing research papers, while building an AI content workflow shows where a rewriting tool fits in a publishing pipeline.
Who should not buy it: if you need a tool that writes a first draft from a brief, a copy generator, for example Copy.ai, or a general assistant like ChatGPT does more of the work. Writers who mainly want tone and clarity feedback across every app they type in will often prefer Grammarly. Students should also read their institution's rules before paraphrasing or humanizing assigned work, since many policies treat undisclosed rewriting as an integrity problem.
Pricing
Free: $0, with paraphrasing of up to 100 words per run in two modes, limited humanizing and a limited AI Detector. Premium: $4.17 per month, billed annually, which unlocks full paraphrasing in nine built-in modes plus custom ones, plagiarism checks of 25,000 words a month and summaries of up to 6,000 words. Team: no public price; QuillBot sells it with centralized billing, a user dashboard and usage metrics.
The Premium page shows only the annual rate and checkout requires an account, so Hokai lists no monthly or quarterly price it could not read. Checked on QuillBot's Premium page on 2026-11-02. Compare the Grammarly plans before choosing.
| Tier | Monthly price | What it includes |
|---|---|---|
| Free | Free | Paraphrase up to 100 words per run, Standard and Fluency modes, Basic grammar fixes, Summaries of up to 1,200 words, Limited AI Detector and Humanizer |
| Premium | $4.17/mo | Full paraphrasing access, 9 built-in modes plus unlimited custom modes, Plagiarism checks, 25,000 words a month, Full AI Detector and Humanizer, Summaries of up to 6,000 words |
| Team | Custom | Everything in Premium, Team usage metrics, User management dashboard, Centralized billing and data control, Priority support and account management |
Feature Comparison by Tier
| Feature | Free | Team | Premium |
|---|---|---|---|
| Paraphrasing | Up to 100 words per run | Full access | Full access |
| Built-in modes | Standard and Fluency | 9 plus unlimited custom | 9 plus unlimited custom |
| Plagiarism checker | — | As Premium | 25,000 words/month |
| AI Humanizer | Limited | Full access | Full access |
| Summaries | 1,200 words | 6,000 words | 6,000 words |
| QuillBot Flow storage | 10 MB | 100 MB | 100 MB |
| Admin and usage metrics | — | ✓ | — |
Key Features
- Paraphraser with custom modes: Premium offers nine built-in modes, including Academic and Simple, plus unlimited custom modes and a synonym slider; Free users get Standard and Fluency only.
- Grammar Checker: Checks grammar, spelling and punctuation in six languages, with tone insights and advanced suggestions on Premium.
- Plagiarism Checker: Premium scans up to 25,000 words a month against online sources to catch accidental copying before you submit.
- AI Detector and Humanizer: The AI Detector flags likely machine-written passages, and the Humanizer, still labelled beta, rewrites them; both are limited on the free plan.
- Summarizer: Condenses up to 6,000 words on Premium, with custom summary lengths; the free plan stops at 1,200 words.
- AI Chat, images and translation: AI Chat and an image generator come with usage limits, and the translator covers more than 40 languages.
- Apps and extensions: Extensions for Chrome, Edge and Safari, a Word add-in, Windows and macOS apps, and iOS and Android keyboards that rewrite text inside other apps.
Pros
- Paraphrasing quality and the range of rewriting styles are the main reason reviewers pick QuillBot over grammar-only tools.
- Paraphrasing and translation across dozens of languages make it useful for multilingual writers, not only English learners.
- 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 plan's 100-word cap per run makes it impractical for pasting in a long document at once.
- The AI Humanizer is still labelled beta, and text that passes a detector can still break an assignment's rules.
- The grammar checker is less advanced than specialized tools like Grammarly for complex sentence-level analysis.
- Only an annual Premium price is public, so anyone who wants to pay month to month has to sign in to see the cost.
- 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
How much does QuillBot Premium cost in 2026?
QuillBot's Premium page lists $4.17 a month, billed annually. The page shows no monthly or quarterly option and checkout requires an account, so Hokai only lists the price it could read. The Team plan has no public price.
What can you do on QuillBot's free plan?
You can rewrite short passages in two modes, Standard and Fluency, fix basic grammar errors, summarize up to 1,200 words, and try the AI Detector and Humanizer with limits. Premium removes the length cap, opens the other built-in modes and adds the plagiarism checker.
Which tools are the best QuillBot alternatives?
Grammarly is the main rival for grammar and tone feedback, Wordtune is the closest pure rewriting tool, and ProWritingAid suits long-form writers who want style reports. If you need text generated from scratch rather than reworked, Copy.ai or Jasper fit the job better.
Should I use QuillBot or Grammarly?
Use QuillBot when rewriting is the main job, for example simplifying a dense paragraph or changing its register, because that is where its modes go deepest. Grammarly is the better pick for writers who want suggestions on tone and clarity while typing in email, documents and chat. Trying both free plans first costs nothing.
Is using QuillBot allowed for school work?
That depends on your institution, not on QuillBot. Grammar fixes and citations are usually accepted, while paraphrasing or humanizing text you did not write can count as misconduct under many academic integrity policies. Check your course rules, and keep your drafts so you can show how the work developed.
Top Alternatives
- Grammarly: Grammarly integrates tone and clarity feedback across apps; QuillBot makes paraphrasing the core feature.
- Wordtune: Both rewrite existing text; QuillBot adds plagiarism and AI-detection checks to the same subscription.
- ProWritingAid: ProWritingAid leans on style reports for long-form writers, while QuillBot centres on rewriting and originality checks.
- 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.
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, ProWritingAid and 8 more AI writing assistants compared for 2026, with current prices, free-tier caps and a way to choose.
Also mentioned in
- Best AI for Writing Research Papers in 2026: Find, Read, Then Draft: Best AI for writing research papers: Consensus and Gemini Notebook find and read sources while you write the argument. Prices and rules, checked 20 Oct 2026.
- Copy.ai vs JetWriter AI in 2026: They're Not Actually Competing: Fullcast bought Copy.ai in October 2025 and cut its free tier for $1,000-a-month GTM pricing. JetWriter AI stayed an $18 extension. See who each fits.
- How to Build an AI Content Workflow: From Brief to Published Post: AI Overviews now cite pages outside the organic top 10 most of the time. This 2026 guide rebuilds the content workflow around that fact, stage by stage.
- The Best AI to Use for School in 2026, and What It Actually Costs: Nine AI tools students actually use for school in 2026, priced with real student discounts, plus the academic-integrity risk most roundups skip over completely.