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qTox vs Session: catalog facts
qTox	Session
Free Free and open source under the GPL.	Free Free and open source under the GPL 3.0, run by the Session Technology Foundation.
Windows, macOS, Linux	Windows, macOS, Linux, Android, iOS
Peer-to-peer encrypted messaging without a central server Voice, video and file transfer in one client	No phone number or email needed; the account is a random ID Onion routing hides your address from recipients and from the network
Contacts must also use Tox Smaller user base than mainstream messengers	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	License: GPL-3.0
Not stated if an account is needed	No account needed
Not stated if it works offline	Works offline
Official website Full listing and sources Checked September 23, 2026	Official website Full listing and sources Checked September 21, 2026

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