Delta Chat

Delta Chat

Overview

• Delta Chat is a powerful decentralized instant messenger designed to facilitate seamless communication for friends, families, and professional organizations.

• By leveraging the existing global email infrastructure, it provides a reliable messaging experience without the need for centralized servers.

• The application is maintained by a dedicated community of Free and Open Source Software (FOSS) contributors who ensure the platform receives regular updates, security refinements, and new features several times a year across all major global platforms.

Privacy and Security

• Anonymous onboarding allows users to start messaging immediately without providing a phone number or other sensitive private data.

• The platform features audited end-to-end encryption that protects conversations against potential network-level or server-side attacks.

• Users maintain total digital sovereignty as the system can be run using a personal email address or a private server.

Versatility and User Experience

• Delta Chat supports multiple chat profiles, making it easy to manage different personas or professional roles within a single app.

• The interface is designed for high flexibility, allowing for easy setup and synchronization across multiple devices simultaneously.

• Integrated audio and video calling capabilities ensure that users can stay connected with high-quality communication regardless of their physical location.

Reliability and Innovation

• The messenger is engineered to remain functional under adversarial network conditions or in areas with poor internet connectivity.

• An extensible framework allows users to add interactive tools directly into their chats, such as shopping lists, shared calendars, or gaming applications.

• Built entirely on open internet standards, the software remains transparent and accessible through its FOSS development model, ensuring no vendor lock-in or proprietary restrictions.

FAQ

Q: How is Delta Chat different from other popular messaging apps I might be using?

A: The main difference is its foundation: Delta Chat uses standard email for messaging instead of relying on its own dedicated servers or requiring a phone number for registration. This makes it truly decentralized, giving you more control and freedom compared to apps that operate on proprietary, centralized platforms.

Q: Is Delta Chat a secure messaging option?

A: Yes, absolutely! Delta Chat features audited end-to-end encryption. This means your conversations are protected from potential network-level or server-side attacks, ensuring your privacy and security.

Q: Do I need to provide a phone number or other sensitive personal data to use Delta Chat?

A: Not at all! One of Delta Chat's great features is its anonymous onboarding. You can start messaging immediately without needing to provide a phone number or any other sensitive private data, which is fantastic for your privacy.

Version History

v2.59.1——14 Sep 2026

Decentralized private messenger with chat-shared tools and games. Download the latest version of Delta Chat to enjoy new features and updates immediately!

*2.59.1

• Avoid crashes during calls in some devices

• Updated translations

*2.59.0

• Add support for reactions in channels

• Improve reactions details overview

• Make video player full-screen

• Pause system music while recording voice message

• Improve calls experience

• Several bug fixes and updated translations

*2.58.0

• Add support for reactions in channels

• Improve reactions details overview

• Make video player full-screen

• Pause system music while recording voice message

• Improve calls experience

• Several bug fixes and updated translations