Alternatives to ZeroGPT

A web tool that estimates whether text was written by AI, with extra writing utilities. The listings below can replace it for an important use case. Each note says what changes if you switch.

  • ZeroGPT

    A web tool that estimates whether text was written by AI, with extra writing utilities.

    FreeProprietaryWeb

Replacements

Listings that take over the same core job as ZeroGPT.

  • GPTZero

    An AI content detector that estimates whether text was written by ChatGPT, Claude, Gemini or other models.

    FreemiumProprietaryWebBrowser extension

    GPTZero adds sentence-level highlighting, Google Docs writing replay and plagiarism checks, with a Chrome extension, though free scans are limited in length.

  • Originality.ai

    An AI text detector and plagiarism checker for publishers and content teams, with browser extensions.

    FreemiumProprietaryWebBrowser extension

    Originality.ai adds plagiarism, readability and fact checks with browser extensions and an API, but its free tier allows only three scans a day.

  • Winston AI

    An online AI content detector and plagiarism checker for text from ChatGPT, Claude, Gemini and other models.

    FreemiumProprietaryWeb

    Winston AI adds plagiarism checking and separate workflows for education, SEO and writers, but full use requires an account.

  • Copyleaks

    A plagiarism checker and AI content detector for text, code and other media.

    PaidProprietaryWeb

    Copyleaks is a paid service adding plagiarism checks for text and source code and an API, aimed at institutions and businesses.

  • Quetext

    A web plagiarism checker and AI detector with grammar, summarizing and citation tools.

    FreemiumProprietaryWebBrowser extension

    Quetext pairs AI detection with plagiarism checks, citations and grammar tools, adding a Chrome extension and REST API on a freemium plan.

  • Smodin

    An online AI writing toolkit with an AI detector, humanizer, plagiarism checker and rewriting tools.

    FreemiumProprietaryWeb

    Smodin combines an AI detector with a humanizer, plagiarism checker and rewriting tools, accepting Word and PDF uploads, with full use on a paid plan.

Similar software

Related functionality, not a direct replacement.