iThenticate vs Originality.ai
iThenticate
ithenticate.com
Originality.ai
originality.aiSide by side
| Figure | iThenticate | Originality.ai |
|---|---|---|
| Price from | — | $12.95/mo |
| Free plan | — | Yes |
| Free trial | — | Yes |
| Open source | — | — |
| Web | Yes | Yes |
| API | Yes | Yes |
| Plans published | 3 | 7 |
| Spec score · Plagiarism Checkers | 7.7 (#17) | 9.0 (#6) |
| Spec score · Plagiarism Detection Software | 7.7 (#19) | 8.9 (#7) |
| API | API access is available only for organizational accounts and requires contacting an iThenticate account sales representative. | The public REST API accepts scan requests and returns AI-likelihood and plagiarism results; the help page says it supports 30 languages. |
| Headquarters | Oakland, California | Collingwood, Ontario, Canada |
| Integrations | iThenticate supports Crossref Similarity Check and its search targets can include Crossref content. | Originality.ai offers a Moodle integration for reviewing submitted work for AI-generated text and plagiarism within Moodle. |
| Security | The service added multi-factor authentication by one-time passcode for iThenticate administrator sign-ins in September 2026. | The help center states uploaded scanner content is end-to-end encrypted and inaccessible to staff or other users unless shared. |
| Support | iThenticate says its support team is available 24/7 and provides support by email at [email protected]. | 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. |
Plans
iThenticate
- Single$125, paid once
- Multiple$300, paid once
- OrganizationPriced on request
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
iThenticate
iThenticate has no write-up on Specifiction yet; its figures are above.
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.