QuillBot
An AI-powered writing assistant for paraphrasing, grammar checking, summarization, and more.
What is QuillBot?
QuillBot began in 2017 as a dorm-room project to aid English language learners, gaining viral traction and evolving into a comprehensive AI writing assistant under the Learneo umbrella. It processes text input to offer paraphrasing, grammar correction, summarization, tone adjustment, plagiarism detection, translation, and AI detection. Its user base exceeds 35 million monthly active writers.
What you can do with it
Academic rewriting
Students rephrase essays or scholarly writing to improve clarity while maintaining original meaning.
Content adaptation
Professionals adjust tone and register for business or formal communication using different paraphrasing modes.
Research summarization
Users condense lengthy articles or papers into concise summaries with one click.
Plagiarism and AI‑generated content checking
Users verify originality and human‑authorship authenticity when editing existing text.
Multilingual translation
Translators or multilingual writers convert text across dozens of languages directly within the tool.
Citation assistance
Writers generate formatted citations from sources in styles such as APA or MLA.
Key features
- Paraphrasing tool with multiple rewriting modes
- Grammar and spelling correction
- Summarizer for condensing longer text
- Plagiarism and AI‑detection checks (Premium only)
- Citation generation in various styles
- Translation across many languages
- AI humanizer and tone insight tools
- Extensions and integrations (e.g., browser extensions, Word/Docs add‑ins)
Screenshots
Inputs / Outputs
Strengths & Limitations
Strengths
Generous free tier
Offers real paraphrasing, grammar checking, and summarization (up to ~125‑word/paraphrase and ~1,200‑word summarizer) with no time limit.
Affordable Premium
Annual plan clocks in at ~$8.33/month—below many competing tools—while monthly is $19.95/month.
Feature-rich
Premium includes unlimited paraphrasing modes, advanced grammar, plagiarism checker, AI detector, co‑writing, tone tools.
Team and student options
Discounted pricing for students (about $6.25/month) and team plans with style guides, admin controls, and volume discounts.
Broad integrations
Available via browser extensions and integrates with Google Docs, MS Word, etc.
Proven user adoption
Over 35 million active monthly users and billions of paraphrase inputs annually.
Limitations
Free limitations
Free plan restricts to limited word counts, fewer paraphrase modes and lacks plagiarism detection.
No API access
Does not offer API endpoints for automation or developer workflows.
Paraphrasing-centric
Tool is heavily geared toward paraphrasing—less suited for long-form content generation or deep editorial analysis.
Plagiarism/AI detector caps
Check quotas (e.g., 20 pages/month) may limit heavy users.
Renewal pricing concerns
Some users report renewal prices higher than introduction offers; cancellation flows may be clunky.
Tone occasionally unnatural
Automated paraphrasing can at times produce awkward phrasing.
Pricing & Plans
Model: Freemium
Free
Basic paraphrasing (125‑word limit, two modes), grammar checking, summarizer (up to ~1,200 words), limited translation, basic AI detection, access to extensions
Premium (Monthly)
Unlimited paraphrasing and modes, advanced grammar, summarizer extended (~6,000 words), plagiarism and AI detection tools, humanizer, tone insights, fast processing
Premium (Annual)
Same as Premium monthly, with approximately 58 % savings over monthly billing
Student (Annual)
Full Premium feature set at a discounted student rate (requires verification)
Free tier available; Premium individual plan starts at approximately $19.95/month monthly or $8.33/month billed annually; Teams and Student discounted plans available.
Who it's for
Ideal for
Students, ESL writers, content creators, and small teams who need quick, cost-effective paraphrasing, summarization, and grammar tools.
Not ideal for
Users needing full-featured long-form AI content generation, API integration, or comprehensive style and developmental editing.
What users say
- Value for cost
- Free tier praise
- Paraphrasing effectiveness
- Pricing transparency concerns
- Team collaboration features
- Integration convenience
Prompts & Results
›Paraphrase: "The quick brown fox jumps over the lazy dog."
Example paraphrase outputs could include variations such as "The swift brown fox leaps over the idle dog." (Premium only; illustrates paraphrasing capability).
›Summarize: "Artificial intelligence has revolutionized many aspects of modern life..."
A concise summary capturing key points from the input text (summarizer tool). (Basic summarization available in free tier up to ~1,200 words).
›Check grammar: "She go to school yesterday."
"She went to school yesterday." (Grammar checker corrects tense error.)
›Detect AI content in: "In this essay, we explore..."
An AI-detection score indicating likelihood of AI-generated text. (Limited monthly usage; Premium extends quota.)
FAQ
Is QuillBot free?+
Yes, it offers a free tier with limited usage—roughly 125 words per paraphrase, basic paraphrase modes, summarizer up to ~1,200 words, and basic tools.
How much does Premium cost?+
Approximately $19.95/month on the monthly plan, or about $8.33/month when billed annually (~$99.95/year). Student and team plans offer lower per-user rates.
What features does Premium unlock?+
Unlimited paraphrasing, all paraphrase modes, advanced grammar, plagiarism checking, AI detection, summary customization, co‑writing, and browser/ document integrations.
Are there team or student discounts?+
Yes—student pricing can be as low as ~$6.25/month with verification; teams get volume discounts and admin tools, starting around $7.50/user/month annually.
When did QuillBot start?+
The tool debuted in 2017, created by students aiming to help ELL writers, and later gained funding and incorporated into Learneo.
Can I use QuillBot via API?+
No—QuillBot currently does not offer API access for automation.
Ratings & Reviews
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