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Winston AI vs Copyleaks: catalog facts
Winston AI	Copyleaks
Freemium Free to start with no credit card required; paid use and sales-led plans are offered.	Paid A commercial service; the homepage directs organisations to request a demo.
Web	Web
Detects text from ChatGPT, Claude, Gemini and other models Plagiarism checking in the same tool	Detects both plagiarism and AI-generated text Checks source code for plagiarism
AI detection results are estimates and can be wrong Full use requires an account	Aimed mainly at institutions and businesses AI detection results are probabilistic and can be wrong
Web application	Hosted service
Closed source	Closed source
License not stated	License not stated
Account 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.