Compare software

Session vs Olvid: catalog facts
Session	Olvid
Free Free and open source under the GPL 3.0, run by the Session Technology Foundation.	Free The homepage presents Olvid as free messaging for everyone and does not list prices.
Windows, macOS, Linux, Android, iOS	Windows, macOS, Linux, Android, iOS
No phone number or email needed; the account is a random ID Onion routing hides your address from recipients and from the network	No phone number, email or personal details needed to use it Never requests access to the address book
Losing your recovery phrase means losing the account with no reset Delivery can be slower than a centralised messenger	Contacts must also install Olvid to chat with you Pricing and licensing details are not stated on the homepage
Downloadable app	Downloadable app
Open source	Closed source
License: GPL-3.0	License not stated
No account needed	Not stated if an account is needed
Works offline	Not stated if it works offline
Official website Full listing and sources Checked September 21, 2026	Official website Full listing and sources Checked September 23, 2026

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