Alternatives to Delta Chat

Jami

Jami suits people seeking free/libre messaging and calls without requiring personal information to create an account.

SimpleX Chat suits people who want messaging without assigned profile identifiers and need apps across mobile and desktop platforms.

Olvid

Olvid suits people who want messaging across phones and computers without providing personal details to operate the app.

Session

Session suits people who want private messaging without registering a phone number or email address, and who need encrypted group chats or disappearing messages.

Wire

Wire suits organizations seeking encrypted communications, including those needing private-cloud or on-premises deployment.

It suits activists, journalists and others needing encrypted communication across internet and offline connections.

imo suits people seeking free internet calls and messaging across mobile, desktop, and web platforms.

WhatsApp suits people who want free messaging, voice and video calls, and group conversations across mobile, desktop, and web.

Cwtch

Cwtch suits users seeking decentralized, Tor-based messaging across desktop and Android platforms.

Cyph

Cyph suits people seeking private messaging, encrypted meetings, and cloud storage across desktop, mobile, and web.

FluffyChat

It suits people seeking a free Matrix client across mobile, desktop, and web platforms.

Messenger suits people who want messaging and calls across mobile, desktop, and web, including chats without a phone number.

Threema

Threema may suit people seeking messaging without providing a phone number or email address, as well as organizations needing messaging integrations and administration tools.

Signal

Signal suits people seeking encrypted messaging and calls across mobile and desktop platforms.

Keybase suits people and teams seeking encrypted messaging, file sharing and Git collaboration across desktop, mobile and web platforms.

Status

It suits people seeking a combined wallet, private messenger, browser connection, and community tool.