Duplicate Content Detector
The best 50 Duplicate Content Detector AI tools - Free & Paid
Explore 50 AI for Duplicate Content Detector
Decopy is a free AI content detection tool with 99% accuracy, capable of identifying AI-generated text, providing detailed reports, and enhancing text quality. It supports multiple languages and is user-friendly and versatile.
Free
Copyleaks delivers AI text and image detection, plagiarism checking, grammar correction, and text moderation in 30+ languages. It integrates via API, LMS, browser extensions, and Google Docs, supports major LLMs, and ensures secure, compliant workflows for education and enterprise.
Free
- $13.99/mo
ContentDetector.AI is a free tool that identifies AI-generated written text, including Chat GPT and GPT 3 content, and provides an estimated percentage score of AI generation likelihood.
Free
GPTZero AI Detector scans documents for potential AI-generated content, providing in-depth results on AI probabilities, vocabulary analysis, and hallucination detection, as well as plagiarism checking and authorship verification capabilities.
Freemium
- $12/mo
AI Content Detector - Trusted GPT-4 analyzes text to identify human-written versus AI-generated content. It offers document uploads, supports multiple languages, and provides percentage-based insights on originality, making it useful for educators and content creators.
Free
MyDetector is a free tool that detects AI-generated text and humanizes it to ensure authenticity. It supports multiple languages, offers 99% accuracy, and refines content to match human-like quality.
Free
NoPlagio checks uploaded documents against 80 million academic articles and live web sources, supporting 129 languages. It gives similarity scores, color‑coded plagiarism types (citation, paraphrase, improper reference), source links, and protects privacy by never storing files.
Freemium
PlagiarismSearch.com compares submitted text to a vast database of web pages, journals, and printed sources, highlighting matches and providing similarity reports, AI‑content detection, readability checks, spell‑check, and API integration for real‑time academic integrity.
Paid
Detecting‑AI scans text in 50+ languages, marking AI‑generated sentences with probability scores. It integrates with Chrome, Moodle, Zapier, and offers an API, delivering up to 98% accuracy and low false‑positives while protecting user privacy.
Freemium
- $7/mo
Originality.ai evaluates text for AI generation, plagiarism, factual accuracy, readability, grammar, and SEO. The Chrome extension and web app enable on‑page checks, bulk scanning, PDF uploads, and API integration for writers and editors.
Free trial
- $12.95/mo
The AI plagiarism checker from plagiarismcheck.org uses advanced AI technology to detect AI-generated content and plagiarism, supports various file formats, and is useful in academia, SEO, and recruitment.
Freemium
- $5.99
Undetectable AI scans text and images for signatures of models like GPT‑4, Gemini, and Claude, combining multiple engine results into a probability score. It handles paraphrased content, supports 50+ languages, and offers a Chrome extension and API.
Free
- $5/mo
X Detector analyzes up to 5,000 characters, giving per‑word probability scores to identify whether a passage was written by ChatGPT, Claude, Gemini, or a human. It supports over 20 languages, processes millions of texts, and encrypts data for privacy.
Freemium
AI Undetect evaluates AI‑generated content and rewrites it into human‑like text in 20+ languages. It integrates with ChatGPT, Claude, and Jasper, offering manual and auto‑perfect modes, and shows unified detection results from GPTZero, Copyleaks, Turnitin, Originality AI, and more.
Paid
Uncheck AI detects AI‑generated content and rewrites it to evade detection while preserving meaning, grammar, and style. Supporting over 30 languages and removing watermark phrases, its output is error‑free, plagiarism‑free, and suitable for email marketing and SEO.
Freemium
- $6.99/mo
Quetext is an all‑in‑one writing platform offering plagiarism detection, AI content detection, real‑time grammar and spell correction, summarization, paraphrasing, and citation generation. It supports PDF, DOC, TXT files with bulk uploads for students, teachers, researchers, and creators.
Freemium
- $8/mo
AI-based plagiarism remover rewrites duplicate text while preserving context and readability, offering modes (Word Changer, Formal, Shorten), file upload/download, 15+ languages and integrated tools for checking, paraphrasing, grammar, summarizing and citation generation and export.
Free
ZeroGPT is a comprehensive AI tool suite offering advanced features for content detection, text refinement, and translation, including AI detection, plagiarism checking, humanization, and summarization.
Freemium
- $7.99/mo
Detectmy.ai is an AI content detector that identifies AI-generated, paraphrased, and human-written text. It provides detailed reports, confidence scores, and integrates with third-party AI models for workflows in education, publishing, and content moderation.
Free
AI Detector evaluates text for AI authorship likelihood, delivering a percentage score. It compares style, vocabulary, sentence length, and coherence against extensive human and AI datasets, enabling targeted edits for academic, SEO, and publishing standards.
Free
- $5.91
Deepfake Detector analyzes audio, video, and image files with up to 95 % accuracy, offering noise removal, probability scores, confidence levels, and multilingual support. It includes a Chrome extension for web checks and an API for real‑time verification in business communications.
Paid
Detector.io is an AI detection tool that scans text to identify AI-generated passages, providing a score and highlighted segments. It includes integrated tools like an AI humanizer and plagiarism checker to help refine content for authenticity.
Free
Copysmith delivers AI‑powered tools for SEO‑friendly content creation. It includes Frase for search signal tracking, Describely for bulk e‑commerce product descriptions, and Rytr for conversational copy, enabling teams to produce optimized, consistent material quickly.
Freemium
Uncheck AI evaluates text for AI signatures, then rewrites it into human‑like, spam‑free prose that passes detectors such as GPTZero, Turnitin, Copyleaks, and ZeroGPT. It removes OpenAI watermarks, supports SEO‑friendly, multilingual content, and gives simultaneous detection scores.
Freemium
- $12.99/mo
AI Detector identifies AI‑generated content across text, images, audio, and video, supporting common media formats. It achieves 98.9% accuracy for synthetic images and offers an API for seamless integration into KYC, fraud‑prevention, and moderation workflows.
Freemium
- $5/mo
AI Detector Pro provides comprehensive recognition of AI-generated text and includes advanced features to manage AI generation reports efficiently.
Free trial
BypassAI rewrites AI‑generated content to bypass detection tools like GPTZero, Turnitin, and ZeroGPT, removing watermark patterns and spam‑like language. It supports 30+ languages, preserves meaning, and improves SEO‑friendly readability for academic, editorial, and marketing use.
Subscription
- $6.99/mo
Copyter is a versatile AI text generator with 40+ tools for seamless content creation in multiple languages. Easily create high-quality text, tailor tones, and export in PDF/Word formats, enhancing productivity for all users.
Subscription
- $9/mo
BypassGPT rewrites AI‑generated text into human‑like, plagiarism‑free content. It supports keyword‑rich SEO, file upload and API integration, helping students, bloggers, webmasters, and agencies avoid AI detection for improved readability and brand voice.
Free
- $8/mo
Dechecker AI is an AI content detector that identifies text generated by models like ChatGPT, Claude, and Gemini. It provides sentence-level analysis with highlighted passages and offers rewriting suggestions to enhance originality and readability.
Free
Copymatic uses GPT‑3 to generate multi‑language blog posts, landing page copy, ads, and product descriptions, offering SEO‑optimized content, headline and meta‑tag creation, keyword research, publishing schedules, built‑in analytics, grammar checks, and integration via Chrome extension, API, or Word
Subscription
- $19/mo
Detectordeia is a sophisticated tool designed to analyze texts, distinguishing between AI-generated content and human-written material by evaluating writing patterns, structure, and style.
Free
ZeroGPT Detector is a widely trusted AI-powered plagiarism checker that accurately detects AI-generated content and supports multiple languages.
Free
Smodin is an AI‑powered writing assistant that detects, removes, and rewrites AI‑generated content, offers a plagiarism checker, and supports over 50 languages and .doc/.pdf/.txt uploads, helping writers create original, human‑sounding text.
Paid
AI Voice Detector identifies AI‑generated speech with up to 99 % accuracy. It analyzes MP3, WAV, OGG, M4A, MP4, MOV files up to 10 min by segmenting audio, applying voice‑activity detection, and deep‑learning scoring. Supports multiple languages, Chrome extension, desktop app, API.
Subscription
- $24.99
DecEptioner rewrites machine‑generated text to evade AI detection. A browser extension plugs into detectors like ZeroGPT, Turnitin, GPTZero, offering model‑based paraphrasing, readability scoring, universal rewrite mode, and local history for quick revisions.
Freemium
ZeroGPT is a web‑based AI detector that evaluates text for content from models like ChatGPT, GPT‑4, Claude, and more, delivering a percentage score. It accepts up to 2,000 words paste, unlimited uploads, runs locally, and offers a Chrome extension.
Freemium
Lunchbreak AI scans documents with Turnitin, GPTZero and other detectors, highlights AI‑flagged sections, and offers one‑click rewriting that preserves meaning and voice. It supports academic, research, and business writing, ensuring detector compliance without loss of originality.
Freemium
uPass AI rewrites AI‑generated content to lower detection scores from Turnitin, GPTZero, and Copyleaks. It offers simultaneous detection checks and human‑like rephrasing, preserving meaning while improving grammar and reducing redundancy for academic writing.
Freemium
- $12.99/mo
Checkforai is an AI tool that detects AI-generated content in written text, ensuring authenticity and helping prevent plagiarism and search engine penalization.
Free
AI Content Detector evaluates text for AI authorship, handling uploads up to 4 MB or pasted input. It returns a detection score, readability rating, and grade assessment, comparing against models such as ChatGPT, Gemini, Claude, and LLaMA. Useful for researchers, educators, and publishers to verify
Paid
- $9.99
Duply automates image and video production via a RESTful API and dynamic URL templates. Users batch‑generate visuals with CSV, Zapier or Make.com, import spreadsheet forms, embed custom parameters, and instantly receive brand‑consistent graphics without opening an editor.
Subscription
- $26/mo
AI Content Checker is a free browser extension that enhances web publishing by detecting errors, ensuring quality logic, and perfecting content before publication. It offers features like reviewing pages, answering specific questions, highlighting headings/links, identifying spacing issues, and open
Free trial
Kopy: AI-powered Shopify tool for effortless product import, enhancement & multilingual support.
Free trial
- $4.99/mo
ZeroGPT Plus detects AI‑generated text from models such as ChatGPT, Gemini, and Claude with high accuracy. It delivers instant analysis, confidence scores, sentence‑by‑sentence breakdowns, and actionable improvement suggestions in multiple languages and file formats.
Paid
JobCopilot automates job search by crawling 500,000+ company sites, auto‑filling applications, generating tailored resumes and cover letters, tracking status, retrieving hiring manager emails, and offering interview, salary, and career advisory modules.
Freemium
AI Detector analyzes texts of at least 80 words to identify AI-generated content from various models. It produces detailed reports with confidence scores, aiding educators and students in evaluating academic submissions across multiple languages.
Free
Scribbr offers academic writing support with professional editing, plagiarism detection, citation generation across styles, AI‑powered proofreading, paraphrasing, summarizing, sentence rewriting, and a Chrome extension for in‑browser citations, helping students and researchers produce polished manus
Freemium