plagiarism checker
9 tools with this tag
Best 9 plagiarism checker tools in 2026
StudyCorgi ChatGPT Detector GPTZero TuanXiang CopyLeaks Originality Quetext are among the best paid / free tools tagged "plagiarism checker".
CopyLeaks
Over 99% accuracy AI detecting 30+ languages, including ChatGPT, Gemini, and Claude LLMs.
GPTZero
A free AI content detection tool used by over a million people worldwide.
Originality
Originality.ai is an AI-powered platform designed to detect AI-generated content and plagiarism, ensuring the authenticity and originality of written work for content creators and publishers.
Quetext
Quetext's plagiarism checker and AI detector uses DeepSearch™ technology to scan billions of sources, identifying copied content and AI-generated text for writers and educators.
StudyCorgi ChatGPT Detector
A free tool for detecting whether academic papers are generated by ChatGPT, ensuring authenticity and originality in research.
TuanXiang
A platform for AI content detection and optimization, including AIGC detection, plagiarism reduction, and text similarity analysis.
Undetectable AI
AI detector by Undetectable AI for checking text authenticity, identifying AI-generated content, and providing instant results with a ChatGPT detector.
Xueshucha
Xueshucha by Youdao uses DeepSeek and proprietary models to detect AI-generated content and reduce plagiarism and AI similarity in academic documents to under 10%.
ZeroGPT
ZeroGPT's AI content detector identifies AI-generated text, including ChatGPT, with high accuracy. This free tool helps check for AI plagiarism in writing.