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Deku SMS vs SMSecure: catalog facts
Deku SMS	SMSecure
Free Free and open source under the GPL-3.0 licence.	Free Free and open source under the GPL-3.0 licence.
Android	Android
End-to-end encrypted SMS Message forwarding to the cloud	Encrypted conversations over ordinary SMS Continues the Silence and TextSecure line on current Android
Android only Encrypted messaging needs a compatible app on the other end	Encryption only works when the contact also uses a compatible app Android only
Downloadable app	Downloadable app
Open source	Open source
License: GPL-3.0-or-later	License: GPL-3.0
Not stated if an account is needed	Not stated if an account is needed
Not stated if it works offline	Not stated if it works offline
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.