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Onetime Secret vs Hemmelig: catalog facts
Onetime Secret	Hemmelig
Freemium Free to create secret links, with paid plans listed on the pricing page.	Free The hosted service at hemmelig.app can be used free of charge; the code is under the…
Web, Self-hosted	Web
Links self-destruct after one view Optional passphrase and expiry	Client-side encryption of shared secrets Messages self-destruct after being read
Only for text, not files Recipient must open the link before it expires	Source-available O'Saasy licence, not OSI open source Little documentation of features was available in the research
Web application, Self-hosted, Hosted service	Web application
Open source	Closed source
License not stated	License: O'Saasy
No account needed	Not stated if an account is needed
Needs internet	Needs internet
Official website Full listing and sources Checked October 2, 2026	Official website Full listing and sources Checked October 2, 2026

Catalog facts only. Anything “not stated” is unconfirmed. Check full listings for details.