ZeroGPT is a free AI content detector that checks text for ChatGPT, GPT-4, Gemini, Claude and other LLM output, alongside writing tools like a humanizer, paraphraser and plagiarism checker.
About
ZeroGPT is a web-based AI content detector that analyzes text and estimates how much of it was generated by AI models such as ChatGPT, GPT-4, Gemini, Claude, Grok, DeepSeek and LLaMA. It addresses a growing need among teachers, publishers, editors and employers to verify whether a piece of writing was produced by a person or a large language model. Beyond detection, ZeroGPT bundles a suite of writing utilities, including an AI humanizer, plagiarism checker, paraphraser, summarizer, grammar checker, translator, word counter, dictionary and citation generator, as well as detectors for AI-generated images and videos.
Users paste text (up to 15,000 characters per check on the main input) or upload files, and ZeroGPT's DeepAnalyse™ technology runs a multi-stage analysis that highlights AI-written sentences individually and reports an overall AI percentage. The company states a 98.4% detection accuracy, a false positive rate below 1%, and coverage of more than 35 LLM families, with support for all languages. Automatic PDF reports can be generated for each detection, and batch file uploads are processed in a dashboard.
Key Features
Pricing & Fees
- Pricing: A free plan is available at $0 forever with no credit card required; paid personal plans are offered on monthly and annual terms (annual billing is advertised as 40% off), and an Enterprise plan is quoted on request. Specific paid plan prices are not fully listed on the pages we reviewed; check the official site for current plans.
- API: Pay-as-you-go professional API plans support document-, paragraph- and sentence-level detection with detailed probability statistics and batch inference.
- WhatsApp and Telegram: After registering a phone number or Telegram code in the dashboard's Social Settings, users can run detection, summarization, paraphrasing, translation and grammar checks inside WhatsApp or Telegram.
- Languages: Detection is advertised to support all languages.
- Input limit: The on-page text checker accepts up to 15,000 characters per submission.
Who It's For
ZeroGPT suits teachers and academic staff screening essays for AI-written content, editors and publishers verifying submitted articles, hiring teams reviewing written assessments, and content marketers checking that copy reads as human-written. Students and freelance writers use the grammar checker, paraphraser and summarizer, while developers and organizations can integrate detection into their own workflows through the API. The WhatsApp and Telegram access also makes it practical for users who prefer working inside messaging apps rather than a browser.
FAQ
What is ZeroGPT?ZeroGPT is an online AI content detector that estimates what share of a text was written by AI models such as ChatGPT, GPT-4, Gemini, Claude and DeepSeek, and it also offers writing tools like a humanizer, paraphraser, grammar checker and plagiarism checker.
Is ZeroGPT free to use?Yes, ZeroGPT offers a free plan at no cost with no credit card required, with paid personal plans, API plans and a custom Enterprise plan available for heavier use.
What accuracy does ZeroGPT claim?The company states 98.4% detection accuracy, a false positive rate under 1%, and coverage of more than 35 LLM families, though independent verification of these figures is not provided on the site.
Can ZeroGPT be used outside the browser?Yes, after registering a WhatsApp number or Telegram code in the dashboard, its detection and writing features can be used directly inside WhatsApp and Telegram, and developers can access the same capabilities through a pay-as-you-go API.
How much text can ZeroGPT check at once?The on-page checker accepts up to 15,000 characters per submission, and registered users can upload multiple files at once for batch processing in the dashboard.
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