plagiarism checker
11 tools with this tag
Best 11 plagiarism checker tools in 2026
EvalHub Winston AI Originality Undetectable AI ZeroGPT Xueshucha Quetext CopyLeaks TuanXiang StudyCorgi ChatGPT Detector GPTZero are among the best paid / free tools tagged "plagiarism checker".
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.
GPTZero
A free AI content detection tool used by over a million people worldwide.
CopyLeaks
Over 99% accuracy AI detecting 30+ languages, including ChatGPT, Gemini, and Claude LLMs.
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.
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.
Undetectable AI
AI detector by Undetectable AI for checking text authenticity, identifying AI-generated content, and providing instant results with a ChatGPT detector.
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.
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%.
Winston AI
Winston AI is an AI content detector and plagiarism checker by Gowinston, designed to identify text generated by ChatGPT, Claude, Google Gemini, and other AI models.
EvalHub
EvalHub's free AI tool detects AI-generated text and humanizes it for natural writing. Supports PDF, Word, and multiple languages with deep analysis.