Delta Chat

Delta Chat

Decentral Private Messenger

121 ratings
129 reviews
Free

Details

  • Released
  • Updated
  • January 8, 2020
  • August 7, 2026

Features

Delta Chat screenshot #1 for iPhone
Delta Chat screenshot #2 for iPhone
Delta Chat screenshot #3 for iPhone
Delta Chat screenshot #4 for iPhone
Delta Chat screenshot #5 for iPhone
iphone
ipad
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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
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What's New in Delta Chat

2.57.1

August 7, 2026

- Prefer adding relay over adding profiles when scanning QR code - Share attachments of multiple selected messages at once - Fix chat edge contrast when iOS changes the status bar color - Fix: Category labels in emoji picker not rendering correctly on iOS 26 - Fix: Incorrect content inset when "Share to x" alert is presented when sharing to Delta Chat - Fix sometimes unaligned chat subtitle - Fix onboarding page buttons - Fix status bar edge effect contrast - Fix stickers - Fix layout glitches in iOS 15 - Add Hebrew language, update translations and local help These features will roll out over the coming days. Thanks for using Delta Chat!

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User reviews

fun AND secure messaging

I love using Delta Chat: the ease of setting it up, the fun variety of apps that let you share notes, todo lists, games, or photo diaries with a contact or group. It’s so handy to have simple secure shared tools in this format. I’m still working on bringing over contacts though, that’s the hard part.
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Отличное приложение.

Все работает отлично за исключением одного момента, как организовать чтобы в чат не сыпались все письма а только те кого добавил в чат сам?

Seems to be good.

I’ve not had time to fully test this app. I’m yet to make any kind of voice or video call. But so far, the app seems very stable and easy to use. No data collection is also important. No KYC either. Time will tell, but so far, so good. Thanks Dev. Good work, and a great idea to use the totally insecure email system to make a totally secure messenger.

The only problem would be the keylogger built into the Apple keyboard. Any way around that?
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Doesn’t work

Emails arrive to Gmail, but they didn’t arrive in delta app.

la migliore soluzione

complimenti! vi chiedo di fare piccoli aggiornamenti sui colori delle bolle + altri dettagli e una nuova icona app 🙏

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.