Top 10 Best Plagiarism Checking Software of 2026

Turnitin is a leading plagiarism detection platform primarily designed for educational institutions, scanning student submissions against a massive database of over 1 billion web pages, 200 million student papers, and academic publications. It generates detailed similarity reports highlighting matches with side-by-side comparisons, color-coded sections, and originality scores. Beyond basic checks, it includes AI-powered writing detection, peer review tools, and integration with learning management systems like Canvas and Moodle to support grading and feedback workflows.

Grammarly is a popular writing assistant that includes a built-in plagiarism checker in its premium plans, scanning documents against billions of web pages and ProQuest's academic database for potential matches. It generates detailed originality reports highlighting plagiarized sections with source links and similarity percentages. While not a standalone plagiarism tool, it integrates seamlessly with grammar, style, and clarity checks to support overall writing improvement and originality verification.

iThenticate is a professional-grade plagiarism detection software developed by Turnitin, specifically tailored for researchers, publishers, and academic institutions. It scans submitted documents against an extensive database of over 60 billion web pages, 200 million scholarly articles, and proprietary content from leading publishers like Elsevier and IEEE. The tool generates detailed similarity reports with side-by-side comparisons to help users identify and evaluate potential matches accurately.

Copyleaks is a robust plagiarism detection platform that scans text against billions of web pages, academic databases, and internal repositories to identify similarities. It supports over 30 languages, detects AI-generated content with high accuracy, and provides detailed reports with source highlighting and similarity scores. The tool integrates seamlessly with LMS like Moodle, Canvas, and Google Classroom, making it suitable for educational and professional environments.

Unicheck is a robust plagiarism detection tool tailored for educational environments, scanning documents against a massive database of over 90 billion web pages, academic publications, and student papers. It generates detailed similarity reports with highlighted matches, source citations, and self-plagiarism detection. The software excels in seamless integrations with learning management systems (LMS) like Moodle, Canvas, and Blackboard, enabling efficient workflow for educators.

PlagScan is a comprehensive plagiarism detection tool designed for educators, students, and professionals, scanning documents against a massive database including web content, academic papers, books, and specialized repositories. It generates detailed similarity reports with highlighted matches, source links, and options for excluding quotes or bibliographies. The software supports multiple file formats and integrates seamlessly with learning management systems like Moodle and Blackboard.

Quetext is an AI-powered plagiarism detection tool that scans text against billions of web pages and academic databases using its proprietary DeepSearch™ technology. It generates detailed, color-coded similarity reports highlighting potential plagiarism with contextual analysis. The software also includes a Citation Assistant for generating properly formatted citations in multiple styles.

Scribbr offers a specialized plagiarism checker tailored for students and academics, scanning documents against a vast database of over 99 billion web pages, 8 million publications, and 91 million open access papers. It generates detailed similarity reports highlighting matched sources with direct links and percentages, including self-plagiarism detection and AI content identification. The tool supports multiple file formats like Word, PDF, and Google Docs, making it suitable for theses, essays, and research papers.

PlagiarismCheck.org is a robust online plagiarism detection tool that scans documents against billions of web pages, academic databases, and publications to identify duplicated content. It supports various file formats like PDF, DOCX, TXT, and images via OCR, delivering detailed reports with similarity scores and source highlights. The platform also includes AI-generated content detection and bulk upload capabilities, making it suitable for educators, students, and professionals.

Viper, available at scanmyessay.com, is a plagiarism detection tool that scans uploaded documents or pasted text against a database of over 10 billion web pages, academic papers, and student essays. It generates similarity reports with highlighted matches and percentages, helping users identify potential plagiarism. While the free version suits basic needs, premium upgrades offer unlimited scans, larger file support, and ad-free experience with PDF exports.