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Originality.ai vs Copyleaks: catalog facts
Originality.ai	Copyleaks
Freemium Three free AI scans per day, with paid plans for more.	Paid A commercial service; the homepage directs organisations to request a demo.
Web, Browser extension	Web
AI detection plus plagiarism, readability and fact checks Chrome and Firefox extensions with Google Docs support	Detects both plagiarism and AI-generated text Checks source code for plagiarism
Free tier is limited to three scans a day AI detection results are estimates and can be wrong	Aimed mainly at institutions and businesses AI detection results are probabilistic and can be wrong
Web application, Browser extension	Hosted service
Closed source	Closed source
License not stated	License not stated
Not stated if an account is needed	Account 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.