Ever wondering where the QR codes in #deltachat come from? each of them is handmade, as everything in delta :) #fosdem

If you want to do a fun thing this weekend, maybe write a little webxdc app for your family or friends chats? There are many to fork from, see

webxdc apps

and for development docs

Get Started - Webxdc

And for development tooling

GitHub

GitHub - webxdc/webxdc-dev: A development server for webxdc apps

A development server for webxdc apps. Contribute to webxdc/webxdc-dev development by creating an account on GitHub.

which simulates a multi member chat environment to run your app, before you post the zip file to a chat of yours. Everyone can start it. No app stores. No logins. No gafam. With built-in end-to-end encryption. Cheers.

#deltachat and #chatmail and #webxdc are in a unique "market" where few other cross-platform messengers can play. The unique and growing market is shaped by rising authoritarianism, internet shutdowns and restrictions. We are building a "Minecraft world of messaging" where skilled people can rip apart, modify, replace, recombine and do modding, at every level. All #foss and featuring Decent Usability and UI Offline first End-to-End encryption Standards based Resilient Decentralized

#deltachat does - no bindings to public handles/numbers - no address-book upload - not do public contact or group discovery - not have critical persistent server state (!) Social identification is private, between people though ephemeral #P2P #E2EE messages. Servers see messages with random sender and recipient addresses, but those can not be mapped to a phone number or public handle. Servers see IP addresses. But you can use Tor, or a VPN, if you want to hide that. It' not all bad :)

PSA We are happy about the wealth of privacy focused classic email providers (proton, tutanota, posteo, mailbox.org etc) but they are not geared for instant secure messaging. Do yourself, family and friends a favor and use delta with any of the many

Chatmail: Relays

Chatmail provides FOSS infrastructure for interoperable, secure, speedy and reliable end-to-end encrypted messaging. Check out clients as Arcane C...

Or setup a relay of your own if you feel like it. Or use a a dedicated chat email address on your own or any classic email server that has reliable service and no obnoxious rate limits or annoying spam handling. Cheers.

Our stance simplified: we want to make private communications available to anyone on the planet. Problem: governments everywhere tend to want to control and contain private communications. While Iran and Russia might be contemporary poster examples trying to control private communication, almost all of the "Western" countries have similar control-tendencies, EU Chatcontrol, UK Online Safety Act, US KOSA etc.pp. And we often call those out. Without private communication, things are bleak.

Abdanan, January 7th 2026. A 40K people city in Iranian mountains where people took over all police and government buildings, as far as we gather. Internet blockades are happening intermittently in various forms. There is a massive sense of uncertainty and panic, also from the government side. We hear of many people succeeding in using #deltachat and #chatmail relays, and are trying, to the best of our abilities, to help people set up communications so families and friends can stay safe.

We are looking for an experienced Android UI developer for

GitHub

GitHub - deltachat/deltachat-android: Decentralized private messenger with chat-shared tools and games for Android

Decentralized private messenger with chat-shared tools and games for Android - deltachat/deltachat-android

. Native Java, close to the system, with minimal deps and fluff. Networking/encryption/persistence is not part of the job as it happens in

GitHub

GitHub - chatmail/core: Chatmail Rust Core library, used by Android/iOS/desktop chatmail apps, bindings and bots 📧

Chatmail Rust Core library, used by Android/iOS/desktop chatmail apps, bindings and bots 📧 - GitHub - chatmail/core: Chatmail Rust Core library...

Remote collab is fine and the default. We meet in person every few months in the black forest or other occasions/places. We can do 20-30 hours per week contracts with 4-5K EUR pay per month. Drop us a DM if you are interested. #FediHire

Don't believe those who loudly claim email can not avoid metadata! They are ignorant of our continuous works on minimizing metadata: DONE: - no phone number other identifying data needed - no cleartext "Subject" - no cleartext "To" - randomized "Date" - no IP addresses - group/avatar/attachment/etc metadata only contained in encrypted message parts Upcoming: - servers to never see cryptographic ID metadata - remove "threading" and auxilliary headers - experiment with Sealed Sender

#39c3 .ending .. quite an enjoyable blast, and thanks to all the wonderful people just dropping by to say "thank you, it all works very nice for us"! 🥰 Certainly raised team spirits :) This year around, apart from one #chatmail relay setup workshop we didn't do any registered events at congress. Pushing out releases, Illnesses and engagements in various other organizing prevented more public sessions. Next ones will be around #fosdem2026 where also several of us will be around. Cheers!