Delta Chat is described as 'Uses email as a decentralized chat platform with modern interface, open source code, no central servers, strong privacy controls, and no account signup' and is a popular instant messenger in the social & communications category. There are more than 50 alternatives to Delta Chat for a variety of platforms, including Android, iPhone, Linux, Windows and Mac apps. The best Delta Chat alternative is Signal, which is both free and Open Source. Other great apps like Delta Chat are Telegram, Element, Tox and SimpleX Chat.
World's most secure P2P messenger. End-to-end encrypted, zero-server architecture, quantum-resistant roadmap. WebRTC direct connections, advanced ECDH + DTLS + SAS verification, full ASN.1 validation.
Radar discovers people and things around you, lets you chat securely, share media, and stay safe — even when the internet is gone. No phone number. No email address. No data collected. Ever. No advertising. Ever.
United Kingdom
Tempo is a privacy-focused messaging app designed for secure communication. Features include end-to-end encryption, restrictions on screenshots and screen recordings, and self-destructing messages.
City of Hats is a secure messaging platform introducing a new concept called location-controlled messaging.
Canada
