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Smodin vs Copyleaks: catalog facts
Smodin	Copyleaks
Freemium Free to try, with paid plans for heavier use.	Paid A commercial service; the homepage directs organisations to request a demo.
Web	Web
Several writing tools in one place Accepts uploaded Word, PDF and text files	Detects both plagiarism and AI-generated text Checks source code for plagiarism
AI detection scores are estimates and can be wrong Humanizer output may conflict with school or publisher rules	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
No 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.