Originality.ai vs Plag
Originality.ai
originality.ai
Plag
plag.ieSide by side
| Figure | Originality.ai | Plag |
|---|---|---|
| Price from | $12.95/mo | €14.95/mo |
| Free plan | Yes | — |
| Free trial | Yes | — |
| Open source | — | — |
| Web | Yes | Yes |
| API | Yes | — |
| Plans published | 7 | 3 |
| Spec score · Plagiarism Checkers | 9.0 (#6) | 7.5 (#22) |
| AI detection | The service estimates whether text resembles writing generated by systems such as GPT, Claude and ChatGPT. | The AI detector checks text generated by ChatGPT, Gemini, Llama, and other AI models. |
| Founded | 2022 | 2011 |
| Headquarters | Collingwood, Ontario, Canada | The privacy policy lists LINGUA INTELLEGENS, UAB at Palangos St. 4-101, Vilnius, Lithuania. |
| Privacy | The privacy policy says it covers data processed through the website, app, Chrome extension, API, Moodle plugin, and educational integrations. | The site says uploaded documents are not added to comparative databases or shared with lecturers, schools, or others. |
| Product | Originality.ai offers tools for AI detection, plagiarism detection, fact checking, readability, grammar and spelling, and content quality checks. | Plag is an online platform for detecting and preventing plagiarism by comparing text with internet sources and published materials. |
| Support | The pricing page says Pro support issues are typically resolved within 24 hours or less and Enterprise priority support issues typically within an hour or less. | The contact page offers 24/7 chatbot support, while the FAQ says paid clients can access live chat staffed by human agents. |
Plans
Originality.ai
- BasicFree
- Pro$12.95 a month
- Pro (annual billing)$12.95 a month
- Pro (monthly billing)$14.95 a month
- Enterprise$136.58 a month
- Enterprise (annual billing)$136.58 a month
- Enterprise (monthly billing)$179 a month
In their own words
Originality.ai
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.