Paid AI detector and plagiarism checker for content publishers and professional writers, integrated into workflows via extension or API.
Originality.ai combines high accuracy (~85% on RAID benchmark) with strong resistance to paraphrase attacks, though transparency of the model is limited and pricing is credit‑based.
85 %
0.5 %
1st in 9/11 adversarial tests;
25
Originality.ai employs a proprietary machine‑learning model that analyzes token patterns to estimate the probability text was AI‑generated, returning a confidence score alongside plagiarism results.
Browser extension and API let publishers scan drafts directly inside their CMS or content pipeline.
Checks for both AI‑generated text and plagiarized passages in one pass.
Ranks 1st in 9/11 adversarial tests; detects paraphrased content with 96.7 % accuracy.
| Benchmark | Accuracy | False Positive | Adversarial Robustness | Notes |
|---|---|---|---|---|
| RAID (6 M docs) | 85% | 0.5% | High (ranked 1st in 9/11 adversarial tests) | Highest overall accuracy among detectors |
| Other Studies | % | % | No independent OIS data available |
Among the most accurate and robust detectors, especially against paraphrasing, though rare bypasses like homoglyph attacks exist.
Pay‑as‑you‑go at roughly $0.01 per 100 words, or a $14.95/mo subscription with bundled credits; API and bulk plans available.
Quality assurance for educational blog or course content.
SEO‑focused publishers verifying originality of outsourced articles.
Legal teams checking for plagiarism and AI‑generated wording.
Large content agencies verifying drafts in bulk via the API.
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Marketing‑oriented free detector for quick checks.
If you need a professional‑grade detector that excels at catching paraphrased AI text and integrates smoothly into editorial workflows, Originality.ai is a top choice—just factor in its credit pricing and closed‑source model.