Copyleaks 是 AI 內容真實性平台，可檢查文字是否由 AI 生成並偵測抄襲，並支援圖片、影片與程式碼檢測，提供個人、企業與教育方案。
GPTZero 是一款 AI 內容偵測與寫作驗證工具，適合教育者、團隊與開發者。可掃描 AI 生成內容、混合作者與引用問題，並支援課堂、工作流程與 API 整合。
Grammarly is an AI writing assistant for individuals, teams, and organizations that helps improve grammar, clarity, tone, and structure. It also offers text generation and originality review across apps, websites, email, docs, and browsers.
Quillbot 是 AI 寫作助手，提供改寫、文法檢查、摘要、引用、原創性檢查與內容創作，並支援瀏覽器擴充功能及網頁、桌機、手機與 Word 跨平台寫作。
Scribbr is an academic writing support platform for students and researchers. It offers proofreading and editing, plagiarism checking, citation generation, an AI detector, and a knowledge base with writing guidance.
Turnitin is an education and research integrity platform that helps institutions check originality, support grading and feedback, and deliver secure assessments. It is used across academic, certification, and research workflows.
Wordvice AI is a web-based AI writing assistant and text editor for proofreading, paraphrasing, translation, summarization, plagiarism checking, and AI detection. It also includes a document editor, ChatPDF, and team plan options.
ZeroGPT is a web-based AI content detector and writing toolkit for identifying likely AI-generated text, reviewing highlighted passages, and supporting editing workflows. It also offers related tools such as a plagiarism checker, paraphraser, humanizer, summarizer, translator, and API access.
Quetext is a plagiarism checker and AI detector for checking original writing, citation support, and revision workflows. It offers a free tier, paid plans, a Chrome Extension, and a RESTful API for teams and developers.
