Pangram

Pangram, founded in Brooklyn in 2023 by AI researchers formerly at Tesla and Google, detects AI-generated text and images with a claimed 99.98% accuracy, analyzing writing for patterns distinctive to models like ChatGPT, Claude, and Gemini, while also checking for plagiarism and identifying AI-assisted content. It supports text and image detection across more than 20 languages, provides segment-level analysis showing how much of a document is AI-generated, and offers a browser extension plus integrations with Canvas, Google Classroom, and Moodle. Pangram includes API access for developers and reports a low false-positive rate of about 1 in 10,000, with third-party validation from researchers at the University of Chicago and University of Maryland. The free tier offers 20 free checks per day after signup, with paid tiers providing additional credits and features like plagiarism detection.