GPTZero

GPTZero is an AI-content detector built primarily for educators and publishers. Users paste or upload text and receive a probability that the content is human, AI, or mixed, with sentence-level highlighting and an education-oriented Writing Process view. It supports batch uploads, plagiarism detection, an API, and LMS integrations on paid tiers, and it is generally regarded as one of the more accurate detectors while still being subject to the false-positive and false-negative limits inherent to all detection tools.

GPTZero launched in early 2023 as one of the first mainstream AI-text detectors and has grown into a broader authenticity platform. It scores pasted or uploaded text on a probability spectrum from human to AI, highlights the specific sentences that most influenced the verdict, and offers an education-focused Writing Process feature that examines revision history and typing patterns rather than relying on the finished text alone. The tool supports common file formats (TXT, DOC, DOCX, PDF, and images) and layers on batch uploads, plagiarism checking, and an API on paid tiers. It targets teachers, universities, publishers, and hiring teams who need a repeatable way to screen submissions, alongside a browser extension and integrations aimed at classroom workflows. Like all AI detectors, GPTZero is probabilistic, not definitive. Independent testing generally places it among the stronger detectors, but false positives (human text flagged as AI) and false negatives remain possible, and the company itself cautions against using scores as sole evidence of misconduct.