Copyleaks vs Secur3D

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.

專項更強除了抄襲檢查外還包含專家人工校對，但缺乏原生的自動 AI 內容檢測功能。

免費 / 開源Undetectable AI is a web platform that scans text for AI fingerprints and rewrites flagged passages so they read like natural human writing. It bundles an AI detector, an AI humanizer and a growing set of media authenticity tools in a single dashboard.

免費 / 開源一次掃描完成 AI 偵測、抄襲比對與內容品質評估

免費 / 開源支援句子級洞察的多語言 AI 檢測工具

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 / 開源不只給分數，還標出證據的 AI 檢測器

免費 / 開源為學校、大學與團隊打造的準確抄襲與 AI 偵測

Quetext is an online writing-integrity platform built around its DeepSearch™ engine, combining a plagiarism checker, AI content detector, grammar checker, summarizer, humanizer, citation generator and paraphrasing assistant in one dashboard. It is used by students, teachers, copywriters and content teams to confirm that a piece of writing is original, human-written and properly sourced before it is submitted or published.

免費 / 開源附逐句分析的免費 AI 內容檢測器

Rulta is a DMCA takedown and content-protection service for online creators. It monitors the web and major platforms for stolen, reuploaded or impersonated content and files removal notices on your behalf, so you can focus on creating instead of chasing leaks.