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Copyleaks vs Originality.ai: catalog facts
Copyleaks	Originality.ai
Paid A commercial service; the homepage directs organisations to request a demo.	Freemium Three free AI scans per day, with paid plans for more.
Web	Web, Browser extension
Detects both plagiarism and AI-generated text Checks source code for plagiarism	AI detection plus plagiarism, readability and fact checks Chrome and Firefox extensions with Google Docs support
Aimed mainly at institutions and businesses AI detection results are probabilistic and can be wrong	Free tier is limited to three scans a day AI detection results are estimates and can be wrong
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.