Prolific vs Roundtable（Proof of Human）

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.

免費 / 開源以隱私為先的網路機器人偵測與詐騙防護平台

精準研究受眾搭配 AI 驗證的資料品質

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 / 開源支援句子級洞察的多語言 AI 檢測工具

專項更強前沿 AI 訓練所用的環境，以及負責例行工作的代理

提供企業級的資料標註與 AI 對齊團隊，但較少針對學術研究招募提供自助服務。

免費 / 開源免費 AI 檢測器，提供逐句分析與文本人性化改寫

免費 / 開源不只給分數，還標出證據的 AI 檢測器

免費 / 開源兩分鐘，一個陌生人，一個問題：真人還是 AI？

專項更強SuperAnnotate is an AI data platform that combines a collaborative multimodal annotation editor, an expert data-operations team, and the orchestration layer needed to move curated datasets into training, evaluation, and production pipelines. It is aimed at teams building computer vision, NLP, audio, and generative AI systems who need reliable, high-quality ground truth at scale.