Originality.ai
AI detection, plagiarism, and fact checking for publishers.
About
Originality.ai is a content verification platform built for publishers, agencies, and editors who need to check whether text was written by AI. Its AI detector scores content for likely LLM authorship across models like GPT-4, Claude, Gemini, and Llama, with sentence-level highlighting that explains why passages were flagged.
Beyond detection it bundles semantic plagiarism checking, an AI fact-checking aid, readability scoring, full-site scans, a Chrome extension, and WordPress and Moodle plugins. Pricing is credit-based, and independent comparisons report roughly 96 percent accuracy on raw AI text with a false positive rate near 5.7 percent.
What it can do
- AI authorship detection with sentence-level highlights
- Semantic plagiarism detection via embeddings
- AI-powered fact-checking aid
- Chrome extension, WordPress and Moodle plugins
- Full-site AI risk scans and public API
Setup
Sign up on the Originality.ai website and buy scan credits; no free tier.
Prerequisites
A paid account with credits; API key for programmatic access.
Use cases
Works with
Trust score — 8/10
Scored 8/10 (verified tier, metrics-v1). Evidence: Verified via vendor site/docs/GitHub and reputable coverage, wave 125; Trending score 78/100 from researcher assessment.
Sources
Every fact above was checked against these sources. Where a claim comes from the provider and couldn't be independently verified, the text says so.