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SMSecure vs Fossify Messages: catalog facts
SMSecure	Fossify Messages
Free Free and open source under the GPL-3.0 licence.	Free Free and open source under the GPL-3.0, with no ads.
Android	Android
Encrypted conversations over ordinary SMS Continues the Silence and TextSecure line on current Android	No ads or tracking libraries Blocking by number and by keyword
Encryption only works when the contact also uses a compatible app Android only	SMS and MMS only, no end-to-end encrypted chat Android only
Downloadable app	Downloadable app
Open source	Open source
License: GPL-3.0	License: GPL-3.0-only
Not stated if an account is needed	No account 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.