AI Detector — Best AI Tools (2026)

Turnitin is the academic integrity platform used by universities and schools worldwide. It offers originality reports, AI writing detection, rubric feedback, and secure submissions.

Grammarly is an AI writing assistant that checks grammar, spelling, punctuation, tone, and clarity across browsers, desktop apps, and mobile devices.

GPTZero is an AI content detector used by 17 million people to identify AI-generated text. It provides sentence-level detection with high accuracy across major AI models.

ZeroGPT is an AI content detection platform that analyzes text to determine whether it was written by AI models like ChatGPT, GPT-5, Gemini, or DeepSeek. It highlights AI-generated sentences and provides detailed PDF reports for educators, publishers, and content teams.

JustDone is an AI writing platform combining a plagiarism checker, AI content detector, AI humanizer, paraphraser, grammar checker, and image generator in one workspace.

Undetectable AI is a free AI content detector and text humanizer. Paste text to instantly check whether it was generated by ChatGPT, Gemini, Claude, Llama, or other models, with results from multiple AI checkers.

Copyleaks is an AI-powered platform for detecting AI-generated content, plagiarism, and code similarity—used by universities, publishers, and enterprises for academic integrity and content authenticity.

This free Turnitin AI Detector preview analyzes pasted text to highlight AI-generated passages. Unlimited words with no signup required for quick checks.

MyDetector is a free AI content detector and humanizer. It identifies text generated by ChatGPT, Claude, Gemini, and other AI writers and offers a companion humanizer to rewrite detected content.

AI Detector is a free AI content detection tool with no word limits. It identifies AI-generated text from ChatGPT, GPT-5.4, Claude, Gemini, and other models with 99.1% accuracy, offering sentence-by-sentence analysis.

Sightengine is an image and video moderation API. Detect nudity, violence, weapons, drugs, text overlays, AI-generated content, and more with simple REST endpoints trusted at scale.