Compare software

Olvid vs Delta Chat: catalog facts
Olvid	Delta Chat
Free The homepage presents Olvid as free messaging for everyone and does not list prices.	Free Free and open source under the GPL 3.0. Free chatmail relays are provided, or use any…
Windows, macOS, Linux, Android, iOS	Windows, macOS, Linux, Android, iOS
No phone number, email or personal details needed to use it Never requests access to the address book	Works with any email account, or with a provided chatmail relay Reaches people who do not use Delta Chat at all
Contacts must also install Olvid to chat with you Pricing and licensing details are not stated on the homepage	Encryption only applies when the other side supports Autocrypt Email metadata such as subject and timing is visible to mail servers
Downloadable app	Downloadable app
Closed source	Open source
License not stated	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.