Certy AI 現已正式關閉，官方網站已徹底無法連線，出現連線逾期與憑證交握失敗。
經核查 certyai.com 目前無法正常提供服務或回傳伺服器錯誤，已暫停外部連結跳轉。
AI 內容偵測器中目前正常營運的已核驗工具，依近期造訪量與編輯評分排序。
免費 / 開源ZeroGPT is an AI content detection platform with a text AI detector, AI image and video detectors, AI humanizer, plagiarism checker, and a set of writing tools including paraphraser, summarizer, grammar checker, translator, and citation helper.
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免費 / 開源Winston AI is an AI content detection suite that identifies text and images produced by generators like ChatGPT, Gemini, and Claude. Alongside its detector it offers plagiarism checking, an AI image and deepfake detector, writing feedback, and an API for embedding detection into other platforms.
#3免費 / 開源GPTZero is an AI detection platform for identifying machine-generated text. It combines a text detector with a Chrome extension, a plagiarism checker, writing-process verification, and educator-focused classroom tools.
Certy AI 曾是一款專為分類廣告與二手交易平台打造的 AI 驅動反詐騙與內容審核系統。透過人臉匿名化、詐騙訊息辨識、付款控管與訊息過濾等自動化工具，協助平台業者打擊詐騙廣告與惡意帳號。
隨著 Certy AI 停止服務，需要尋找內容審核與防詐解決方案的平台開發者，可參考本頁前方的同類安全與審核 AI 工具替代方案。
免費 / 開源ZeroGPT is an AI content detection platform with a text AI detector, AI image and video detectors, AI humanizer, plagiarism checker, and a set of writing tools including paraphraser, summarizer, grammar checker, translator, and citation helper.
免費 / 開源Winston AI is an AI content detection suite that identifies text and images produced by generators like ChatGPT, Gemini, and Claude. Alongside its detector it offers plagiarism checking, an AI image and deepfake detector, writing feedback, and an API for embedding detection into other platforms.
免費 / 開源一次掃描完成 AI 偵測、抄襲比對與內容品質評估
