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Quillbot Plagiarism Checker

AI-powered plagiarism detection with multilingual support and citation guidance

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  • Overview
  • Features
  • Pricing
  • Pros
  • Cons
  • Reviews

Quillbot Plagiarism Checker Overview

  • Updated February 6, 2026

QuillBot Plagiarism Checker is an AI-powered tool designed to detect unoriginal content quickly and accurately across more than 100 languages. It provides detailed similarity reports, highlights missing citations, and integrates a citation generator for APA, MLA, and Chicago styles.

Available through QuillBot Premium, it supports multiple file formats and flexible monthly word limits for professionals, students, and creators.

Key Features

  • AI-Powered Plagiarism Detection: Uses machine learning to compare text against a vast content database.
  • Detailed Similarity Reports: Provides plagiarism scores with source links and highlighted sections.
  • Multilingual Support: Scans content in over 100 languages accurately.
  • Integrated Citation Generator: Instantly create APA, MLA, or Chicago citations.
  • Flexible Word Limits: Includes 25,000 words per month with optional paid add-ons.

Price

Plan Price Featured
Free $0 Limited paraphrasing, Basic summarizer access, Account creation
Premium Monthly $19.95/mo (Billed Monthly) 25,000 plagiarism words/month, Full plagiarism reports, All QuillBot tools
Premium Quarterly $13.31/mo (Billed Quarterly at $39.95) 25,000 plagiarism words/month, Faster processing, Priority features
Premium Annual $8.33/mo (Billed Annually at $99.95) Best value plan, 25,000 plagiarism words/month, Full premium access
Extra Words Add-on $2.45 (6,250 words) / $8.95 (25,000 words) / $19.95 (62,500 words) Flexible top-up, Pay-as-needed usage, No subscription change

Price details: https://quillbot.com/upgrade

Pros

Competitor

Pros
Turnitin QuillBot is significantly more affordable and accessible for individuals, while remaining easy to use. Unlike Turnitin’s institution-focused setup, QuillBot offers direct subscriptions, faster scans, and integrated writing tools that suit freelancers, students, and independent professionals.
Grammarly Plagiarism Checker QuillBot provides clearer citation guidance and flexible word-based pricing. Its plagiarism checker integrates tightly with paraphrasing and summarizing tools, making it more practical for content rewriting workflows compared to Grammarly’s primarily grammar-focused environment.
Copyscape QuillBot offers richer reports, multilingual detection, and academic citation support. While Copyscape excels in web copy checks, QuillBot is better suited for long-form documents, research papers, and educational use at a predictable subscription cost.
Scribbr QuillBot is faster and more flexible, with monthly word allowances and add-ons. Scribbr focuses on academic accuracy, but QuillBot balances speed, usability, and extra writing tools that benefit ongoing content production.
SmallSEOTools QuillBot delivers more reliable accuracy, cleaner reports, and fewer ads. Its premium environment and AI-driven analysis outperform free web-based tools that often limit text length and lack actionable citation feedback.

Cons

Competitor

Cons
Turnitin QuillBot does not have direct access to proprietary academic databases like Turnitin. For university-level submissions checked against institutional repositories, Turnitin may detect overlaps that QuillBot cannot identify.
Grammarly Plagiarism Checker Grammarly offers deeper grammar and style suggestions alongside plagiarism results. QuillBot users may need to rely on multiple tools if advanced editorial feedback is required beyond originality checks.
Copyscape Copyscape is more specialized for web duplication detection. QuillBot’s plagiarism checker can occasionally miss lightly paraphrased web content that Copyscape’s focused crawling may identify.
Scribbr Scribbr provides higher academic rigor and manual review options. QuillBot is automated and faster, but may feel less authoritative for high-stakes thesis or dissertation checking.
SmallSEOTools Free tools allow unlimited checks without subscriptions. QuillBot requires a paid Premium plan for plagiarism scans, which may be a barrier for users needing only occasional checks.

Verified Customer Reviews

  • Medium Review (Rating: 4/5): The reviewer appreciates the ease of use and reliable plagiarism detection but notes that the word limits can feel restrictive for large writing projects.
  • AIDetectPlus Review (Rating: 4/5): The review states QuillBot catches direct plagiarism well, though it may miss heavily paraphrased content, making it useful but not flawless.
  • Reddit/r/UniUK Review (Rating: 3.5/5): Users like the convenience and speed, but express uncertainty about how results compare to institutional tools such as Turnitin.
  • Academic Help Review (Rating: 4.6/5): The analysis praises QuillBot’s detection accuracy and usability, while noting limitations in access to closed academic databases.
  • Zulie Writes Review (Rating: 4/5): The reviewer values the all-in-one writing tools and plagiarism checks, but mentions that Premium pricing may be high for casual users.