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StoneAge Messenger vs Session: catalog facts
StoneAge Messenger	Session
Free Free and open source under GPL-3.0-only.	Free Free and open source under the GPL 3.0, run by the Session Technology Foundation.
Android	Windows, macOS, Linux, Android, iOS
End-to-end encrypted messaging over user-provided storage Supports direct messages and private groups	No phone number or email needed; the account is a random ID Onion routing hides your address from recipients and from the network
Requires an S3 bucket or an invite to someone else's No voice or video calls	Losing your recovery phrase means losing the account with no reset Delivery can be slower than a centralised messenger
Downloadable app	Downloadable app
Open source	Open source
License: GPL-3.0-only	License: GPL-3.0
No account needed	No account needed
Needs internet	Works offline
Official website Full listing and sources Checked October 8, 2026	Official website Full listing and sources Checked September 21, 2026

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