Blog

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...

Updates on Accounts, Downloads, Group-Joins, Search and more

November 17, 2021 - Yip, Delta Chat 1.24 is out for Android and iOS: Read on...

New data protection officer appointed and refined privacy policies

November 10, 2021 - The Delta Chat privacy policy situation just got even better! We appointed Prof. Dr. Fabian Schmieder, professor for data protection and media law of the University of Applied Sciences and Arts Hanover and coauthor of the standard work Betrieblicher Datenschutz (Operational data protection), who is now our data protection officer. He has been helping us for a long time and is not only a great advisor but also a brilliant pianist!:) Read on...