Best AI Tools for AI Text & Plagiarism Detection

Originality.AI is a comprehensive content quality assurance (QA/QC) platform designed primarily for detecting AI-generated text and plagiarism while also offering tools for readability analysis, grammar checking, fact verification, and SEO optimization. It helps web publishers, content creators, and teams maintain ...

Polygraf AI Content Detector is a web-based and Chrome Extension tool designed to analyze text for signs of AI generation or modification. It identifies content produced by models like ChatGPT, Google Gemini, Mistral, Llama, or enhanced by tools such as ...

Undetectable AI is a comprehensive AI detection and humanization platform that identifies AI-generated content from models like ChatGPT, GPT-4/5, Claude, Gemini, and Llama, then rewrites it to produce human-like text that bypasses major AI detectors such as Turnitin, Originality.ai, GPTZero, ...

GPTZero is an AI detection platform that identifies content generated by large language models such as ChatGPT, GPT-5, Gemini, Claude, and Llama. It analyzes text for patterns in perplexity, burstiness, and writing style to deliver a holistic percentage score indicating ...

Circle to Search is a Chrome browser extension that brings an interactive, AI-powered search experience directly into any webpage. Users simply drag or circle text, images, or elements on the screen to instantly trigger a contextual AI conversation, delivering precise ...

DeepFake Detector (https://deepfakedetector.ai/) is an AI-powered online service that analyzes uploaded audio, video, and image files to determine the probability that they are AI-generated deepfakes rather than authentic human content. It examines subtle patterns and anomalies—such as unnatural pauses in ...

PromptGuard is a production-ready AI firewall that functions as a transparent proxy layer between your application and major LLM providers. It inspects every prompt and surrounding context in real time—leveraging heuristics, ML classifiers, and LLM-powered detectors—to block prompt injection and ...

Content Credentials is the consumer-facing branding for the open technical standard developed by the Coalition for Content Provenance and Authenticity (C2PA). It embeds cryptographically signed metadata—often called a "nutrition label"—directly into images, videos, audio files, PDFs, and other digital assets. ...

AI Voice Detector is an online tool that analyzes audio files to determine whether they contain a real human voice or an AI-generated/cloned voice. It processes uploads by splitting audio into 6-second chunks, applying Voice Activity Detection (VAD) to isolate ...

Nuanced is a containerized Language Server Protocol (LSP) server that delivers compiler-grade code intelligence to AI coding agents and tools. It provides structured symbol, type, and call graph facts across multiple languages, enabling precise code navigation, context retrieval, and reasoning ...

Facia.ai is an AI-powered platform specializing in facial recognition, advanced liveness detection (branded as DeepLiveness), and deepfake detection. It enables secure identity verification by comparing a user's live facial biometrics against a Photo ID, 3D face map, or database entries, ...

GPTKit is a free-to-start AI text generation detection tool that analyzes submitted content to determine whether it was written by a human or generated by AI models like ChatGPT. It employs a multi-model approach combining six different AI-based detection techniques ...

ShotSolve is a free native macOS menubar application that lets users capture a screenshot with a single shortcut and instantly query OpenAI’s GPT-4o (with vision capabilities) to receive answers, code, feedback, or analysis directly in a clean chat interface. It ...

Agent.so is the original all-in-one AI Agents Platform designed to let users create, train, and deploy human-like AI agents without any coding or technical expertise. It functions as a comprehensive ecosystem where individuals and businesses can chat with hundreds of ...

Twelve Labs is a video intelligence platform that provides RESTful APIs for developers to build applications powered by multimodal video understanding AI. It enables semantic search, analysis, and embedding generation across video, audio, speech, on-screen text, and visual elements with ...

AICheatCheck (accessible at https://www.aicheatcheck.com/, also referred to as The Checker AI in some contexts) is an AI-powered detection tool specifically designed to identify content generated by GPT models and other large language models. It analyzes sentence structure, syntax patterns, and ...

Illuminarty is a web-based AI detection tool that identifies AI-generated, synthetic, tampered, and deepfake images and text. It uses computer vision and natural language processing algorithms to calculate the probability that content originates from public AI generation models, while also ...

Real or Fake Text (RoFT) at https://roft.io/ is a free, web-based interactive game and research platform that tests and trains users' ability to distinguish between human-written text and AI-generated text. Players engage in "boundary detection" challenges where passages begin with ...