Alternatives to Originality.ai

An AI text detector and plagiarism checker for publishers and content teams, with browser extensions. The listings below can replace it for an important use case. Each note says what changes if you switch.

Replacements

Listings that take over the same core job as Originality.ai.

  • Copyleaks

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

    PaidProprietaryWeb

    Copyleaks is a paid detector that adds source code plagiarism checks and covers video, audio and images, aimed mainly at institutions and businesses.

  • GPTZero

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

    FreemiumProprietaryWebBrowser extension

    GPTZero highlights AI text sentence by sentence, offers writing replay in Google Docs and a Chrome extension, and adds grammar checks.

  • Winston AI

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

    FreemiumProprietaryWeb

    Winston AI combines AI detection and plagiarism checking with separate education, SEO and writer workflows, but has no browser extension listed.

  • Quetext

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

    FreemiumProprietaryWebBrowser extension

    Quetext pairs plagiarism and AI detection with a citation generator, grammar checker, Chrome extension and REST API, aimed at students and teachers.

  • ZeroGPT

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

    FreeProprietaryWeb

    ZeroGPT offers free AI text detection in the browser and checks images and video, without plagiarism checks or fact checking listed.

  • Smodin

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

    FreemiumProprietaryWeb

    Smodin combines an AI detector and plagiarism checker with a humanizer and rewriting tools, and accepts uploaded Word, PDF and text files.

Similar software

Related functionality, not a direct replacement.

  • Grammarly

    An AI writing assistant that checks grammar and spelling and suggests rewrites and tone changes.

    FreemiumProprietaryWebBrowser extension

  • Readable

    An online readability checker that scores text with many readability formulas and highlights passages to fix.

    FreemiumProprietaryWeb

  • Paperpal

    An AI academic writing tool with grammar checks, citations, paraphrasing and journal submission checks.

    FreemiumProprietaryWeb

  • Trinka

    An AI grammar checker and writing assistant aimed at academic and technical writing.

    FreemiumProprietaryWeb