Blog

Guaranteed End-to-End encryption and many other good news

November 23, 2023 - Our rolling 1.42 Delta Chat app releases introduce guaranteed end-to-end encryption, a major security milestone that took many hundreds of hours of challenging work from core Delta Chat teams, experts and collaborators. Friends from activist circles, users and operators of security-related helplines, as well as TeamUSEC all helped us to streamline usability and implementation issues for guaranteed end-to-end encryption. Read on...

Everything-apps without platforms - say 'hi' to xstore 😊

August 11, 2023 - Others are hand-wavingly chattering about so called “super-app” or “everything app” architectures, but we prefer to just deliver and improve them. Today, we are happy to announce a new way to find and start webxdc “everything” apps, among them: Read on...

Introducing DeltaTouch, a new community created client for Ubuntu Touch

July 02, 2023 - Hi, this is Lothar aka lk108. I’m today’s guest on the blog and it’s my pleasure to introduce DeltaTouch, a third-party client based on deltachat-core-rust for the mobile phone OS Ubuntu Touch (UT). The app has just been released on the OpenStore for both the xenial and the focal channel of UT. Here’s what it looks like: Read on...

WebXDC apps can now exchange data and run on other messengers!

June 28, 2023 - Earlier this year we worked hard to enforce WebXDC app privacy but what good is having totally private apps if there is no convenient way to exchange data with the rest of the world? With the Delta Chat 1.38 releases we introduced two new WebXDC APIs to safely and conveniently exchange data with other tools and apps. Read on...

Bringing E2E privacy to the Web: 4th security audit 😅

May 22, 2023 - Delta Chat’s “web apps shared in a chat” come with a unique privacy promise but in January it was shown to be compromised. We got into a surprising struggle with Web browser sandboxing issues that took us several months to come out ahead of. Read on...

Good news from security audits, past and present

March 27, 2023 - In case you wonder how safe Delta Chat’s core messaging implementation and server guides are, you may be interested in the summary statement from the recent independent security audit by Cure53: Read on...

New Guide for Setting up Mail Servers for Delta Chat - and Upcoming Workshops!

January 27, 2023 - Every once in a while we get asked what mail server is best suited for Delta Chat. In short - most mail servers will work well, and reliability depends more on their IP reputation and configuration parameters like spam checking, rate limits, and attachment size how well it works with Delta Chat. One feature-complete mail-server we have successfully worked with is Mailcow. Read on...

Decentralization Unchained (Psst ... want a UI/UX dev job?)

December 15, 2022 - What do indigenous communities in the Amazon rainforest, friends in Cuba, families in Iran, activists from Russia, a monastery in Cambodia, and many folks in the Fediverse have in common? Read on...

Introducing Automatic E-mail Address Porting (AEAP)

September 14, 2022 - The Delta Chat 1.32 releases introduced e-mail porting mechanisms (AEAP). They enable for e-mail what number porting does for mobile phone communications, i.e. to more easily change between communication providers. Read on...

Sharing web apps in a chat

June 14, 2022 - Delta Chat 1.30 introduces support for webxdc apps: which makes it possible to share HTML5 apps (packaged as .xdc files) inside your chats, so that any participant can run the app by clicking “Start” in the message. It transforms Delta Chat into an extensible messenging app where third parties can easily program custom interactive chat extensions, called “webxdc apps”. Read on...

Which e-mail providers work well with Delta Chat? Quite some :)

January 16, 2022 - In the last couple of months we engaged with comparing around 20 international e-mail providers, based on our earlier research into comparison criteria. These efforts were part of our EPPD project funded by the EU. Read on...