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sup3rS3cretMes5age vs 1time: catalog facts
sup3rS3cretMes5age	1time
Free Free and open source under the MIT licence.	Free Free to use and open source under the MIT licence.
Self-hosted, Command line	Web, Self-hosted, Browser extension, Command line
Messages are deleted after one read Configurable expiry up to 7 days	Encryption happens in the browser before upload Optional passphrase and choice of view count
Requires running a HashiCorp Vault instance No hosted public instance listed	Trusting a hosted instance means trusting its served code Small project with few contributors
Self-hosted	Downloadable app, Web application, Self-hosted, Browser extension
Open source	Open source
License: MIT	License: MIT
No account needed	No account needed
Not stated if it works offline	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.