ZeroGPT & StealthWriter - 2026 Pricing, Features, Reviews & Alternatives

ZeroGPT & StealthWriter is a cloud-based AI content detection platform that analyzes text to determine whether it was written by a human or generated by an AI model. Accessible via web browser with no download or installation required, the platform delivers a percentage breakdown of AI-generated content alongside color-coded, sentence-level highlighting to pinpoint flagged segments. Detection is supported across all GPT model versions, including GPT-5 and GPT-5o. The underlying system was trained on a dataset of over 20 million human- and AI-generated articles using machine learning and natural language processing techniques to classify text origin by identifying unique linguistic patterns.

Beyond detection, the platform includes a suite of supporting analytical tools. A Readability Checker applies Coleman Liau, Flesch Kincaid, and Gunning Fog algorithms to produce grade-level readability scores and assess sentence complexity. A structural text analysis module reports sentence, word, and character counts, while additional content checks flag adverbs and passive voice usage. Vocabulary enhancement suggestions and word counter utilities with letter case conversion round out the writing analysis toolkit. A Split Text tool accommodates documents by processing up to 1,000 words per segment.

ZeroGPT & StealthWriter serves a broad target market spanning education, content marketing, publishing, journalism, and SEO and digital marketing. Students, educators, academic institutions, content creators, bloggers, publishers, business owners, SEO professionals, freelancers, and researchers can use the platform to verify the authenticity of written content. An API integration option allows teams to automate text detection within existing workflows. The platform is free to use with no stated article limit for detection, and submitted text is not retained after results are returned.