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ZeroGPT vs GPTZero: catalog facts
ZeroGPT	GPTZero
Free The AI detector is offered free on the website.	Freemium Free scans up to 10,000 characters, with paid upgrades for advanced features.
Web	Web, Browser extension
Free AI text detection in the browser Also checks images and video for AI generation	Sentence-level highlighting rather than a single score Writing replay in Google Docs shows how a document was produced
AI detection results are estimates and can be wrong Text is sent to an online service	AI detection is probabilistic and can misclassify human writing Free scans are limited in length
Web application	Web application, Browser extension
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.