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GPTZero vs ZeroGPT: catalog facts
GPTZero	ZeroGPT
Freemium Free scans up to 10,000 characters, with paid upgrades for advanced features.	Free The AI detector is offered free on the website.
Web, Browser extension	Web
Sentence-level highlighting rather than a single score Writing replay in Google Docs shows how a document was produced	Free AI text detection in the browser Also checks images and video for AI generation
AI detection is probabilistic and can misclassify human writing Free scans are limited in length	AI detection results are estimates and can be wrong Text is sent to an online service
Web application, Browser extension	Web application
Closed source	Closed source
License not stated	License not stated
Not stated if an account is needed	Not stated if an account is needed
Needs internet	Needs internet
Official website Full listing and sources Checked September 26, 2026	Official website Full listing and sources Checked September 26, 2026

Catalog facts only. Anything “not stated” is unconfirmed. Check full listings for details.