The 66 Best AI Plagiarism Detection Tools for Your Problem in 2026

ZeroGPT, Word Spinner - Humanize, Rewrite & Detect, Pass AI Detection, Bypass AI, Integrito — Analyze Text, Check Plagiarism&AI, SmartStudi Sidebar - AI Detector, Paraphraser, and More!, Defacta, Clasa AI, Revisy.ai Plagiarism checker, Know Nota are strong paid/free AI Plagiarism Detection options for common problems.

ZeroGPT

AI Content Detector and ChatGPT Detector, simple way with High Accuracy.

ZeroGPT product preview

ZeroGPT.co

05.0

Word Spinner - Humanize, Rewrite & Detect

Rewrite, humanize, and AI-check any text on any page.

Word Spinner - Humanize, Rewrite & Detect product preview

chromewebstore.google.com

05.0

Pass AI Detection

Check, paraphrase, and write undetectable content

Pass AI Detection product preview

chromewebstore.google.com

05.0

Bypass AI

Transform your AI content to humanizer with our Humanize AI tool.

Bypass AI product preview

Bypass AI

05.0

Integrito — Analyze Text, Check Plagiarism&AI

Integrito is a Chrome extension that checks plagiarism and AI-generated content, with activity reports to prove text authenticity.

Integrito — Analyze Text, Check Plagiarism&AI product preview

chromewebstore.google.com

Teaching Writing Online Limited

🇬🇧United Kingdom

05.0

SmartStudi Sidebar - AI Detector, Paraphraser, and More!

Check, Paraphrase, and Create Undetectable AI Content

SmartStudi Sidebar - AI Detector, Paraphraser, and More! product preview

chromewebstore.google.com

05.0

Defacta

Defacta is a verification layer that checks any text or AI output for factual accuracy, source credibility, bias, and manipulation.

Defacta product preview

Defacta

🇺🇸United States

05.0

Clasa AI

Clasa is a free AI essay grader and checker that scores essays against your rubric and returns annotated feedback in seconds.

Clasa AI product preview

Clasa AI

05.0

Revisy.ai Plagiarism checker

Revisy.ai checks academic writing for matching text and AI-writing signals, then helps students improve clarity, grammar, and citations.

Revisy.ai Plagiarism checker product preview

Revisy

05.0

Know Nota

Know Nota is an AI detector that checks whether your text looks AI-written and explains the result in plain English.

Know Nota product preview

Know Nota

05.0

Plagiarism Checker

Free plagiarism checker scans your text before submission.

Plagiarism Checker product preview

Paraphraser.io

🇬🇧United Kingdom

05.0

Copyleaks

AI-powered platform for detecting AI-generated content, plagiarism, and ensuring content authenticity across text, image, video, and code.

Copyleaks product preview

Copyleaks

🇺🇸United States

05.0

DetectGPT

Free AI detector for ChatGPT, GPT-5 & other LLMs. Paste text or URL, get a score.

DetectGPT product preview

05.0

Unfox AI Detector

Unfox AI Detector checks text for AI-generated content with sentence-level analysis across 17 languages.

Unfox AI Detector product preview

Unfox

05.0

Quetext

Quetext is an all-in-one plagiarism checker and AI detector with writing tools for students, teachers, and professionals.

Quetext product preview

Quetext

05.0

TextGo AI

TextGo AI humanizes AI-generated content to bypass AI detectors, ensuring undetectable, plagiarism-free text.

TextGo AI product preview

05.0

Lunchbreak AI

Check your essay against Turnitin, GPTZero, and Copyleaks before you submit.

Lunchbreak AI product preview

Lunchbreak AI

05.0

Rephrasy

Free AI to human text converter that humanizes AI-generated content to bypass AI detectors.

Rephrasy product preview

Rephrasy

05.0

SmartStudi

AI-powered writing assistant with detector, humanizer, and undetectable chatbot for students.

SmartStudi product preview

05.0

Essayget

Explore our AI Checker and Humanizer tools to effortlessly detect and transform AI content into natural, undetectable text.

Essayget product preview

05.0

Zero GPT - AI Detector

Free AI detector that checks text, images, and video for AI generation with confidence scores.

Zero GPT - AI Detector product preview

ZeroGPT

05.0

TextSight.ai

AI content detection with Authenticity Scores and rewrite suggestions to make text more human.

TextSight.ai product preview

Lacewing Technologies

05.0

GPTinf

GPTinf is an AI writing toolkit that humanizes AI text, detects AI content, checks plagiarism, grammar, and readability.

GPTinf product preview

GPTinf

🇺🇦Ukraine

05.0

Winston AI

Winston AI is the industry leading AI content detector and plagiarism checker for ChatGPT, Claude, Google Gemini and more.

Winston AI product preview

Winston AI

05.0

Originality.ai

Accurate AI detector and content integrity suite for ChatGPT, GPT-5, Gemini, and other AI writing tools.

Originality.ai product preview

Originality.ai

🇨🇦Canada

05.0

OmniDetect

Free AI content detector with multi-engine consensus, published accuracy, and privacy-first design.

OmniDetect product preview

OmniDetect

🇬🇧United Kingdom

05.0

Acurio

AI citation checking for academic papers: Acurio verifies every citation against your source PDFs in minutes.

Acurio product preview

Acurio

🇨🇭Switzerland

05.0

KI Erkennungssoftware der Unis

Online AI detection software for checking texts for AI generation, from €0.29 per page.

KI Erkennungssoftware der Unis product preview

05.0

AIBypasser.Pro

AIBypasser.pro is the best AI detection remover to rewrite your AI text.

AIBypasser.Pro product preview

AI Bypasser

05.0

PassMe AI

Use the stealth AI writer of PassMe to make AI content undetectable and bypass the detection of all AI checkers.

PassMe AI product preview

PassMe AI

05.0

PassMe AI

PassMe AI is an undetectable AI bypasser that humanizes AI text to evade AI detectors, with a free plan available.

PassMe AI product preview

PassMe AI

05.0

AI Humanizer

AI Humanizer instantly converts AI-generated text into natural, human-sounding content that bypasses AI detectors.

AI Humanizer product preview

AI Humanizer

05.0

uPass AI

uPass AI is an AI detector and undetectable AI rewriter built specifically for students.

uPass AI product preview

uPass AI

05.0

Stealthly

Stealthly AI helps you humanize AI text and bypass AI detection.

Stealthly product preview

Stealthly

05.0

AI Scanner

AI Scanner is a free AI detector that checks texts for AI-generated content from ChatGPT, Claude, Gemini, and more.

AI Scanner product preview

AI Scanner

🇺🇸United States

05.0

SpeedAI科研小助手

SpeedAI professional AI paper rewriting and AI rate reduction platform, supporting CNKI, VIP, Wanfang, Daya and other detection systems, helping users remove AI traces.

SpeedAI科研小助手 product preview

SpeedAI科研小助手

05.0

SpeedAI科研小助手

SpeedAI is a professional AI paper rewriting and AI-rate reduction platform, supporting detection systems such as CNKI, VIP, and Wanfang, offering AIGC detection, academic polishing, and more.

SpeedAI科研小助手 product preview

SpeedAI科研小助手

🇨🇳China

05.0

Humanize AI

Humanize AI is a free tool that converts AI-generated text into natural, human-like content.

Humanize AI product preview

2026 HumanizeAI.co

05.0

Undetectio

Effortlessly transform AI-generated text into authentic, human-sounding content that passes all AI detectors.

Undetectio product preview

Undetectio

05.0

PaperRed

PaperRed是一站式科研辅助工具平台，提供免费论文查重、AIGC检测、AI智能降重和AI写作等服务。

PaperRed product preview

2021 paperred.co

🇨🇳China

05.0

Integrito

Integrito is an AI detection tool that analyzes Google Doc writing history to verify authenticity and detect suspicious activity.

Integrito product preview

Integrito.AI -

05.0

GPTZero

The World's #1 AI Content Detector with over 8 Million Users

GPTZero product preview

GPTZero

05.0

GenZWrite

GenZWrite helps 100K+ students & creators humanize AI text, detect AI content & rewrite essays.

GenZWrite product preview

GenZWrite

🇺🇸United States

05.0

XYZ SCIENCE

XYZ SCIENCE: Free AIGC Detection & One-Click Rewriting to Reduce AI Rate

XYZ SCIENCE product preview

05.0

学术猹

网易有道出品的论文一站式处理平台，提供查重、查AI率及降重、降AI服务。

学术猹 product preview

xueshucha.youdao.com

北京网易有道计算机系统有限公司

🇨🇳China

05.0

千笔降AI

千笔降AI是一个专注于降低论文AI率（AIGC率）和重复率的在线工具，通过语义同位素分析和风格迁移网络，使论文顺利通过检测。

千笔降AI product preview

千笔降AI官网 | 清理AI痕迹 | 论文降AI率、论文降重、留学生降AI率

🇨🇳China

05.0

论文降AIGC

提供AI论文降AIGC率、降重服务，帮助去除AI痕迹，降低查重率，支持多语言。

论文降AIGC product preview

aigc.66paper.cn

广州万之禾科技有限公司

🇨🇳China

05.0

团象学术

团象学术网站提供免费AIGC查重、AI降重、免费论文查重、论文降重等服务，专注学术研究领域。

团象学术 product preview

xueshu.tuanxiang.com

团象学术

🇨🇳China

05.0

挖错网

挖错网是北京信工博特智能科技有限公司开发的内容安全审校平台，支持文本挖错、内容安全合规审核及AIGC内容检测。

挖错网 product preview

北京信工博特智能科技有限公司

🇨🇳China

05.0

睿信学术诚信平台

睿信学术诚信平台提供论文AIGC检测、学术图片检测、参考文献溯源取证等学术诚信服务。

睿信学术诚信平台 product preview

rx.ruijianai.com

05.0

GPTZero

The World's #1 AI Content Detector with over 8 Million Users

GPTZero product preview

GPTZero

05.0

PaperXie智能写作

PaperXie免费论文查重检测，为毕业生提供论文重复率检测、降重、AIGC检测、智能排版等一站式服务。

PaperXie智能写作 product preview

2024 武汉智慧六联文化传播有限公司

🇨🇳China

05.0

SideKicker AI

Use Sidekicker’s AI Humanizer to transform robotic AI text into natural, human-sounding writing in seconds.

SideKicker AI product preview

AV Wellbeing Limited

🇨🇾Cyprus

05.0

Smodin

Smodin is an AI-powered writing platform offering AI detection, humanization, plagiarism checking, and writing assistance.

Smodin product preview

Smodin

🇺🇸United States

05.0

爱改写

AiGaiXie focuses on AIGC text processing, offering detection, rewriting, error correction, and intelligent evaluation optimization to help text pass AI detection easily.

爱改写 product preview

2017-2026 无锡惠智数据科技有限公司

🇨🇳China

05.0

Ryne AI

Ryne AI is an AI humanizer and undetectable AI tool suite for students, trusted by 2.3M+ users.

Ryne AI product preview

Ryne AI

05.0

Decopy AI

Decopy AI is an all-in-one AI writing tool for detecting AI content, humanizing text, and summarizing documents.

Decopy AI product preview

Decopy AI

05.0

PlagiarismCheck.org

PlagiarismCheck.org is an accurate plagiarism checker with percentage that helps assess text originality for teachers and students online.

PlagiarismCheck.org product preview

plagiarismcheck.org

Plagiarism Checker

🇬🇧United Kingdom

05.0

BypassGPT

Bypass AI detection effortlessly with our AI humanizer.

BypassGPT product preview

BypassGPT

05.0

Rewritify

Rewritify AI is an undetectable AI tool and AI humanizer that helps you humanize AI content to bypass detection.

Rewritify product preview

Rewritify

05.0