best free plagiarism checker online - AI tools

PlagiarismCheck.org is a comprehensive plagiarism and AI detection tool that helps educators, students, writers, and content creators verify text originality and authorship with advanced algorithms and extensive databases.

• Paid
• From 6$

NoPlagio is a comprehensive online platform that offers plagiarism detection and prevention services, supporting 129 languages and featuring real-time checking against academic databases with over 80 million articles.

• Freemium

CopyFind.AI is a comprehensive content verification tool that combines plagiarism checking and AI content detection capabilities, allowing users to verify text originality and identify AI-generated content.

• Freemium

PaperTyper offers an array of AI-driven writing tools, including an essay generator, plagiarism checker, grammar checker, and citation generator, all designed to aid students in producing high-quality academic papers quickly and efficiently.

• Free

AI Paper Writer is a free AI-powered academic writing tool that instantly generates essays and research papers across all disciplines, featuring built-in grammar checking and plagiarism detection capabilities.

• Free

PrePostSEO offers a comprehensive suite of AI-powered tools including plagiarism checking, paraphrasing, text summarizing, and various SEO and content optimization features.

• Freemium
• From 10$

WriteMyEssays.ai is a comprehensive academic writing platform offering AI-powered tools and professional writing services. It provides free tools including title generator, essay generator, paraphrasing tool, conclusion generator, citation generator, and plagiarism checker.

• Freemium

FreeEssayWriter.ai is an advanced AI essay writing tool that generates high-quality, well-researched academic essays using natural language processing and machine learning algorithms, with access to thousands of scholarly resources.

• Free

Undetectable AI is a comprehensive AI detection and humanization platform that helps users identify and modify AI-generated content to appear more human-like, trusted by over 15 million users and rated #1 by Forbes.

• Freemium
• From 15$

Copyleaks is an enterprise-grade AI content detection and plagiarism checking platform that helps organizations verify content authenticity, protect intellectual property, and ensure compliance with AI governance frameworks.

• Contact for Pricing

Paraphrasing.io is a comprehensive writing assistant that offers AI-powered paraphrasing, summarizing, plagiarism checking, and article rewriting capabilities with multiple modes and flexible subscription options.

• Paid
• From 7$