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Parla vs Delta Chat: catalog facts
Parla	Delta Chat
Free Free and open source under the GPL-3.0 license.	Free Free and open source under the GPL 3.0. Free chatmail relays are provided, or use any…
Windows, macOS, Linux	Windows, macOS, Linux, Android, iOS
Encrypted messaging carried over email Includes shared Webxdc mini-apps	Works with any email account, or with a provided chatmail relay Reaches people who do not use Delta Chat at all
Connects to deltachat-rpc-server.	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
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 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.