It's AI vs Originality.ai

It's AI estimates whether text may have been written by a language model, including content associated with ChatGPT, Gemini, Claude, Grok, and other models. It also offers plagiarism, grammar, and spelling checks. Users can paste text or upload PDF, DOCX, and TXT files; the displayed limits are 200 to 500,000 characters. Deep Scan highlights sentences that appear AI-generated and provides a word heatmap showing which parts influence the score. Listed integrations include an API, Chrome Extension, ChatGPT Plugin, Python SDK, Canvas LMS, and Zapier; Moodle is marked as coming soon. The service is presented for teachers, students, institutions, and publishers, as well as writers, managers, recruiters, and ML engineers. It also offers enterprise API access and batch processing. The FAQ advises treating results as evidence alongside context, not as sole proof of AI use, and says content is not shared with third parties after checks are complete. The free plan is listed at free. Plus is listed at $84 a year, billed at $84/year and shown as $7 and $9/month with annual savings.

Originality.ai provides tools for checking AI-generated text, plagiarism, facts, readability, grammar, spelling and content quality. Its free Basic plan costs $0.00 per free and provides three AI scans per day, with up to 2,000 words per scan. The AI detector offers configurable allowances of 0%, 5%, 15%, 25% or 40%. A website scanner can crawl a site, identify pages likely to contain AI-generated content and run scheduled scans. The browser extension scans Google Docs, web pages or selected text, and includes writing replay, typing behavior insights and shareable reports. A REST-based API submits text for AI and plagiarism scans and returns detailed results; the maker says AI detection supports 30 languages. API AI scans require at least 50 words, and the help page says accuracy decreases below 100 words. Originality.ai describes detection results as probabilistic estimates that may produce false positives or false negatives, not conclusive proof. Pro costs $12.95 per month billed yearly, with a monthly option at $14.95 per month. The service is available through web, API and extension.