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Delta Chat for Android vs Session for Android

The same facts for both, read from GitHub every night, and the relation a person reviewed.

Delta Chat for Android vs Session for Android
Fact	Delta Chat for Android	Session for Android
Language	Java	Kotlin
Licence	GPL-3.0	GPL-3.0
Stars	1.8k	915
Latest	v2.62.0	1.33.5
Last push	2026-10-06	2026-10-05
Release cadence	about 13 days between releases	about 4 days between releases
Active contributors	15 commit authors on the default branch in the last 90 days	4 commit authors on the default branch in the last 90 days
Flags	none	none

How they relate

Both replace WhatsApp. Alternatives to WhatsApp →
PartialDelta Chat for AndroidEncrypted chats and groups carried over email, through any mail account or a chatmail relay.
PartialSession for AndroidEncrypted messages and groups routed through an onion network, with no phone number; calls are in beta.