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Delta Chat

Delta Chat

Decentral Private Messenger

128 ratings
136 reviews
📊 Productivity
🌐 Social Networking
Free

Details

Released
January 8, 2020
Updated
September 30, 2026

Features

Background Location Access

Developer

merlinux
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About

This decentralized messenger offers private, secure, and reliable instant messaging. It allows for easy setup on multiple devices and supports multiple chat profiles without requiring a phone number. Enjoy end-to-end encryption and the flexibility to run it with your own email or server.

✓Decentralized instant messaging
✓Private onboarding without phone number
✓End-to-end encryption
✓Multiple chat profiles
✓Works on multiple devices
✓Self-hosted option
Show original description

What's New in Delta Chat

2.62.2

September 30, 2026

- Onboard on multiple relays by default - No need to mark a relay for sending, this is chosen by the core automatically - Better image quality - Show a hint about contacts not seen for a while - Show coarse time when a contact was seen in the profile headers - More reliable and quicker notifications and call ringing - Update notification when its message is edited - Remove notification if its message is deleted - Improved share sheet reliability - Remove a relay immediately instead of unpublishing it - Carry all relays in invite links for better connectivity - Respect "media quality" when sending videos - Verification line is no longer needed, all contacts have that mean and are e2ee by default since V2 - Improve fetching messages in background - Better file preview when drafting a message - Fix: Do not load webxdc icon if it has too large dimensions - Fix: No longer send read receipts when call window is covering messages - Fix removing quotes or attachments from drafts pre-liquid-glass These features will roll out over the coming days. Thanks for using Delta Chat!

More

User reviews

Most RecentHighest RatedLowest Rated

Pretty good

I like it but there is one thing that it doesn’t call on group chats
HHimynameis…:)

Bester Chat

Man kann Delta auf jedem Gerät installieren und dann auch überall miteinander schreiben und anrufen. Heisst bin am tablett und kann Frau aufm Handy anrufen. Ohne eine Nummer. Haben auch eine Gruppenchat mit allen Geräten, ist top!
DDerLukas21

Сообщения не удаляются с почтового релея

Пропала настройка удаления сообщение с почтового релея при получении или удалении с локального устройства.
ППавлуха

Push уведомления

Уважаемые разработчики. Приложение супер. Удобное. Но почините пожалуйста push уведомления на iOS, чтобы они приходили вовремя, а не спустя какое то время. Это очень неудобно. Приходится постоянно заходить в приложение, чтобы посмотреть не написал ли тебе кто.
AAlexxmur

The Best!

The App is very nice, just add Face ID unlock in it, please!
Iinnersign
See 131 more reviews

FAQ

What is Delta Chat?

Delta Chat is a decentralized instant messenger that prioritizes privacy and security. It allows users to chat with friends, family, and groups using end-to-end encryption. It's built on open internet standards and can be run with your own email address or server for enhanced sovereignty.

How does Delta Chat ensure privacy?

Privacy is a core feature, with instant onboarding that doesn't require a phone number or other private data. It also features audited end-to-end encryption to protect your conversations from network and server attacks. Unknown users cannot message you without mutual consent.

Is Delta Chat free to use?

Yes, Delta Chat is a Free and Open Source Software (FOSS) application. It is available for free across multiple platforms and does not have any in-app purchases or advertisements.

Can I use Delta Chat on multiple devices?

Absolutely. The app is designed to be flexible and easy to set up on multiple devices. You can also manage multiple chat profiles within the application.

What are the benefits of a decentralized messenger?

Decentralized messengers like Delta Chat offer greater user control and privacy by not relying on a single central server. This can make them more resilient to censorship and server attacks. You also have the option to run your own server for maximum control.