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Copyleaks vs Quetext: catalog facts
Copyleaks	Quetext
Paid A commercial service; the homepage directs organisations to request a demo.	Freemium A free option and a free Chrome extension, with fuller features on paid plans.
Web	Web, Browser extension
Detects both plagiarism and AI-generated text Checks source code for plagiarism	Plagiarism and AI detection in one place Citation generator and grammar checker included
Aimed mainly at institutions and businesses AI detection results are probabilistic and can be wrong	AI detection results are probabilistic and can be wrong Text is checked on Quetext's servers
Hosted service	Web application, Browser extension
Closed source	Closed source
License not stated	License not stated
Account 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.