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Molly vs Delta Chat: catalog facts
Molly	Delta Chat
Free Free and open source; donations via Open Collective	Free Free and open source under the GPL 3.0. Free chatmail relays are provided, or use any…
Android	Windows, macOS, Linux, Android, iOS
Encrypts the local app database with a user passphrase Supports UnifiedPush notifications without Google services	Works with any email account, or with a provided chatmail relay Reaches people who do not use Delta Chat at all
Android only Registration uses a phone number able to receive SMS or calls, or linking as a Signal linked device	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: AGPL-3.0-only	License: GPL-3.0
Account needed	No account needed
Needs internet	Works offline
Official website Full listing and sources Checked September 20, 2026	Official website Full listing and sources Checked September 21, 2026

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