GPTZero
An AI content detector that estimates whether text was written by ChatGPT, Claude, Gemini or other models.
These buttons open the developer's own site, repository or store listing in a new tab. wares.gg does not host downloads.
About GPTZero
GPTZero checks pasted text and gives an overall AI score along with sentence-by-sentence highlighting of passages likely produced by language models such as ChatGPT, Claude, Gemini and Llama. It also offers a plagiarism checker and free grammar feedback.
A Chrome extension and Google Docs integration run detection in Gmail, Docs, Classroom and social media, and can replay how a document was written, including copy and paste events and typing patterns. It is aimed largely at educators. GPTZero is now part of Superhuman.
Strengths
- Sentence-level highlighting rather than a single score
- Writing replay in Google Docs shows how a document was produced
- Chrome extension works across Gmail, Docs and Classroom
- Includes plagiarism and grammar checks
Limitations
- AI detection is probabilistic and can misclassify human writing
- Free scans are limited in length
- Advanced features require a paid plan
Details
- Pricing
- FreemiumFree scans up to 10,000 characters, with paid upgrades for advanced features.
- License
- Proprietary
- Developer
- GPTZero
- Platforms
- Web, Browser extension
- How it runs
- Web application, Browser extension
- Works offline
- No
- Best suited for
- Teachers and editors checking whether submitted text was written with AI
- Categories
- Learning tools, AI writing
- Last verified
- Added
- Sources
Alternatives to GPTZero
Compare allSoftware that can replace GPTZero for an important use case, and what changes if you switch.
Originality.ai
An AI text detector and plagiarism checker for publishers and content teams, with browser extensions.
Originality.ai adds readability and fact checks plus Firefox support, but its free tier is limited to three scans a day and it targets publishers more than teachers.
Copyleaks
A plagiarism checker and AI content detector for text, code and other media.
Copyleaks is paid only and aimed at institutions, but it also checks source code, video, audio and images for plagiarism, and offers a documented API.
Winston AI
An online AI content detector and plagiarism checker for text from ChatGPT, Claude, Gemini and other models.
Winston AI is web only with no browser extension or Google Docs writing replay, but it offers plagiarism checking and separate workflows for education, SEO and writers.
Quetext
A web plagiarism checker and AI detector with grammar, summarizing and citation tools.
Quetext combines plagiarism and AI detection with a citation generator and a REST API, but it lacks sentence-level highlighting and Google Docs writing replay.
ZeroGPT
A web tool that estimates whether text was written by AI, with extra writing utilities.
ZeroGPT is free and also checks images and video for AI generation, but it has no browser extension, no writing replay and no plagiarism checking listed.
Smodin
An online AI writing toolkit with an AI detector, humanizer, plagiarism checker and rewriting tools.
Smodin bundles AI detection with plagiarism checks, a humanizer and rewriting tools, accepts Word and PDF uploads, but runs only on the web with no extension.
Similar software
Related functionality, not necessarily a direct replacement.
Grammarly
An AI writing assistant that checks grammar and spelling and suggests rewrites and tone changes.
Paperpal
An AI academic writing tool with grammar checks, citations, paraphrasing and journal submission checks.
Trinka
An AI grammar checker and writing assistant aimed at academic and technical writing.
QuillBot
An AI writing tool for paraphrasing, grammar checking, summarizing and generating citations.
Readable
An online readability checker that scores text with many readability formulas and highlights passages to fix.
ProWritingAid
A grammar checker and style editor with planning and critique tools aimed at fiction writers.
