The top 25 AI tools for plagiarism detection (December 2025) | RankmyAI

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Ranking December 2025

Plagiarism detection

The RankmyAI Plagiarism Detection Ranking presents the top 25 AI tools from our Overall ranking focusing on plagiarism detection.

These AI tools typically work by comparing the text with an extensive database of previously published works or internet sources to highlight similarities or exact matches. They are commonly used in academic settings to prevent academic dishonesty, in publishing to ensure content originality, and across other industries where content integrity is crucial.

The green up and red down arrows indicate how many positions a tool has increased or decreased compared to the previous month's ranking. A grey dash means the tool's position has remained unchanged.

Top 25 out of

98

Grammarly Grammarly provides AI-powered writing assistance across various applications, offering features such as grammar checks, plagiarism detection, and personalized writing suggestions to improve efficiency and writing quality.

Quillbot QuillBot provides AI-powered writing tools to enhance fluency and clarity, including paraphrasing, grammar checking, plagiarism detection, and more. Its integration with popular platforms supports seamless writing enhancement.

Scribbr Scribbr offers a comprehensive suite of tools for academic support, including proofreading, plagiarism detection, and citation generation, enhancing efficiency and effectiveness in academic writing.

JustDone S.R.L. JustDone is an AI-powered platform offering tools for plagiarism detection, text humanization, grammar checking, and SEO optimization, designed to enhance content creation efficiency for professionals and businesses.

Rytr Rytr provides an AI-powered writing assistant offering content generation, SEO optimization, and customization, aimed at improving writing efficiency and quality for a diverse user base.

Plagiarismsearch.com PlagiarismSearch offers a comprehensive platform for detecting plagiarism and AI-generated content, integrating with tools like Moodle LMS and Google Docs. It ensures academic integrity with advanced algorithms and customizable API solutions.

Wordvice AI Wordvice AI provides comprehensive AI-driven tools for proofreading, paraphrasing, translation, summarization, and plagiarism detection to enhance writing quality across various applications.

Quetext Quetext employs DeepSearch™ technology to detect plagiarism and AI-based content. It provides tools for generating citations, comprehensive feedback, and interactive text analysis, utilized by millions for efficient and accurate verification.

Winston AI Winston AI is a robust AI content detection platform recognized for its high accuracy in identifying AI-generated text, advanced plagiarism detection, and image verification capabilities, supporting multiple languages with GDPR compliance and seamless integration via an API and Chrome extension.

Smodin Smodin leverages AI to assist in multilingual writing, research, and plagiarism detection, enhancing productivity and ensuring professionalism in content creation.

Paraphraser IO Paraphraser.io is a free online AI-powered tool designed for students, educators, and writers to paraphrase text, ensuring originality and readability using advanced AI algorithms and natural language processing.

Controllo antiplagio NoPlagio is an online platform for plagiarism detection and citation analysis, supporting 129 languages and providing free access to educators for up to 20 documents monthly.

EduWriter EduWriter.ai generates undetectable and original essays swiftly, featuring plagiarism detection and APA formatting, facilitating effortless academic writing.

PaperPal Paperpal offers academic writing enhancement with real-time language suggestions, plagiarism checks, and citation management, catering to students, researchers, and publishers.

Paraphrasing.io Paraphrasing.io enhances writing by rephrasing content to remove plagiarism while maintaining readability, supporting various languages and styles, and offering secure, API-integrated services.

Letrus Letrus is an AI-powered curricular program that develops students’ reading and writing skills in Brazil. It offers automated, competency-based feedback, ENEM-focused practice, plagiarism checks, and real-time analytics for teachers and administrators, reducing correction time and enabling data-driven instruction across entire school networks.

Rephrasely Rephrasely is an AI-powered tool designed to enhance content creation through advanced paraphrasing, plagiarism checking, and language adaptability, supporting over 100 languages with customizable writing modes.

Yomu Yomu AI enhances academic writing through an AI-powered assistant that aids in drafting, editing, and ensuring originality. It supports students and researchers with tools for completing essays, managing citations, and checking for plagiarism.

HumanizerPro HumanizerPro transforms AI-generated text into human-like content, enhancing readability and bypassing AI detectors with sophisticated algorithms and AI models, ensuring plagiarism-free outcomes.

reescribirtextos.net Reescribir Textos is an online tool for rephrasing sentences and articles using AI, ensuring uniqueness and aiding in plagiarism removal. It offers free access with support for document uploads in various formats.

Quizbot Quizbot generates customizable quizzes and assessments using AI, enhancing educational and corporate learning environments. It supports multiple formats, integrates with major LMS platforms, and offers multi-lingual capabilities.

Paraphrase Online Paraphrase Online is a free, AI-powered tool enabling users to rephrase, check grammar, and detect plagiarism efficiently, enhancing writing clarity and avoiding content duplication.

AHelp AHelp offers a suite of AI-driven writing tools designed to increase writing efficiency and maintain quality. The platform includes paraphrasing, grammar checking, plagiarism detection, and more, focusing on the needs of students and educators.

WriterBuddy WriterBuddy is an AI writing assistant that enhances academic and professional writing by providing tools for research, editing, and citation, enabling users to produce high-quality work efficiently.

PaperTyper.net PaperTyper offers AI-powered tools for essay writing, including generation, grammar and plagiarism checking, and citation formatting, tailored for students to enhance productivity and efficiency.

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Disclaimer

The RankmyAI Plagiarism Detection Ranking is derived from our Overall ranking, which measures the popularity of AI tools based on three key metrics: website traffic, reviews, and investments. The Overall ranking is calculated as the weighted average of the individual rankings for each of these metrics (for more details, see our Methodology page).

Not all AI tools in this ranking are exclusively focused on plagiarism detection, as AI tools and companies often provide multiple services beyond this specific application. This ranking does not assess or indicate the quality, effectiveness, or reliability of the listed AI tools. It is solely based on popularity metrics and should not be interpreted as an endorsement or evaluation of their performance.

You are free to use and distribute our ranking, provided that RankmyAI is properly cited as the source (see our Copyright page).