What is ZeroGPT?
ZeroGPT is a web-based AI content detector that estimates how much of a text was written by large language models and highlights the suspect sentences. It serves students, teachers and publishers, offers a free tier with no credit card, and sells an API for detection, plagiarism checks and other writing tools.
Teachers and editors increasingly need a quick first check on whether an essay or article leans on AI. ZeroGPT gives a percentage score and highlights the sentences that drove it, using what it calls DeepAnalyse technology across more than 20 LLM families. Around the detector sits a set of everyday writing utilities, so the same site handles detection, plagiarism checks, grammar fixes and summaries without switching tools.
Main Features
- The AI detector returns a percentage score and highlights sentences that look machine-generated.
- Each check accepts up to 15,000 characters of pasted text, and batch file uploads are supported.
- A plagiarism checker searches for duplicated text online.
- Writing tools include a paraphraser, grammar checker, summarizer, translator, citation generator and word counter.
- An AI humanizer, AI image detector and AI video detector extend checks beyond plain text.
- Detection works in multiple languages, including English, French, German, Spanish, Italian and Portuguese.
- A pay-as-you-go API covers the detector, plagiarism checker, paraphraser, summarizer, grammar checker and translator.
How to Get Started with ZeroGPT
- Go to zerogpt.com; no account is needed for a basic check.
- Paste up to 15,000 characters or upload files, then run the check.
- Review the score and highlighted sentences, and upgrade or use the API for higher volume.
ZeroGPT Pricing
A permanently free tier needs no credit card; personal, Business/EDU and enterprise plans are billed monthly or annually (annual saves about 30%), and the API is pay-as-you-go. Exact plan prices were not listed on the pricing page we saw.
Who Should Use It?
- Teachers screening essays for AI-written passages
- Students checking their own work before submission
- Editors and publishers reviewing freelance articles
- Developers adding AI detection to an app through the API
- Writers who want free grammar, paraphrase and summary tools
ZeroGPT Alternatives
- Copyleaks AI: stronger on institutional plagiarism workflows
- Undetectable AI: humanizer-first, with multi-detector scoring
- QuillBot: better for paraphrasing and grammar than detection
Frequently Asked Questions
Is ZeroGPT free?
Yes, a basic detector is free with no credit card, limited to 15,000 characters per check. Paid personal, education and business plans raise limits, and annual billing is about 30% cheaper than monthly.
How accurate is ZeroGPT?
The company claims 98.4% detection accuracy across 20+ LLM families. Treat any detector score as a signal, not proof, because human writing can be flagged and edited AI text can pass.
Does ZeroGPT have an API?
Yes. A pay-as-you-go API exposes the AI detector plus the plagiarism checker, paraphraser, summarizer, grammar checker, chatbot and translator, so you can build checks into your own software.