ClassGuard vs ContentDetector.org

ClassGuard has no write-up on Specifiction yet; its figures are above.

ContentDetector.org is a free tool that estimates whether text was AI-written and reports a percentage split between AI-written and human-written content. Users can paste text, upload a file, or submit a URL for a report with a score, section highlights, and review guidance. The site says the detector evaluates token-pattern predictability, semantic repetition, formatting regularity, and local stretches of uniform phrasing, including patterns associated with GPT-5, Gemini, Claude, and other large models. It also offers a converter that rewrites AI-generated text to improve tone, flow, clarity, and sentence variety; the converter page shows a 1000-character input counter. Other listed options include API access and bulk checks of folders or URL lists. Platforms include web, extension, iOS, macOS, and Windows. The site says inputs are not used to train models and describes retention controls; its FAQ says inputs are removed when the tab is closed, while the converter page says submitted content is processed instantly and not stored. It warns results can be wrong, especially for very short or heavily edited text, and recommends human review.