Plagiarism + AI detector with Microsoft Word and LMS integrations, popular in education.
Copyleaks pairs plagiarism search with a high‑precision AI detector shown to achieve 100 % accuracy and near‑zero false positives in peer‑reviewed tests, though independent adversarial research is limited.
80 %
0.5 %
Unknown under niche adversarial attacks
30
Copyleaks combines transformer classifiers with statistical features (perplexity, burstiness) to assign an AI‑probability score and highlights suspect passages at sentence level.
Scan once for both copied and AI‑generated text.
LMS, Microsoft Word add‑in, educator dashboard.
Optimized to reduce false flags on ESL writing.
| Benchmark | Accuracy | False Positive | Adversarial Robustness | Notes |
|---|---|---|---|---|
| RAID (6 M docs) | % | % | Not part of RAID benchmark | |
| Other Studies | 100% | 0.01% | OIS study: 126/126 correct AI vs human |
Early studies show perfect accuracy and zero false positives, but real‑world robustness to adversarial tweaks still needs independent validation; calibration recommended for critical workflows.
Subscriptions from $9.99/mo for ~25 k words (100 credits) to $13.99/mo for 300 k words, plus enterprise tiers; free trial with 10 credits.
Universities scanning student submissions for AI.
Editors double‑checking manuscripts post‑plagiarism scan.
Institutions needing bias‑aware ESL detection.
Corporations embedding API in content pipelines.
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Copyleaks offers perhaps the safest AI detector for everyday educational use thanks to vanishingly few false positives and turnkey integrations; pair it with a paraphrase‑robust tool if adversarial obfuscation is a concern.