@delta.chat
Secure decentralized messaging across all major platforms. Instant and reliable via fast chatmail relays, compatible with classic email providers. Features secure mini […] 🌉 bridged from ⁂ https://chaos.social/@delta, follow @ap.brid.gy to interact
Our strong focus on end to end encryption and zero metadata does mean that one of the original project notions of "you can use delta chat as a lightweight cleartext email client and your contacts don't need to care" was deprioritized since some time now and remains available rather for […]
some insights from #deltachat forum gardening 🌸
- we’re getting about 7 new feature proposals per week, with over 1k ideas shared so far
- we aim to keep things simple and focused, so we often have to say "no!", but:
- we do listen: over the years, we’ve fulfilled about ONE THIRD of your […]
@tchambers you're not doing anything wrong ❤️ "@user", so called "mentions", are not implemented yet, but discussed at https://support.delta.chat/t/direct-mention-on-groups/185
@pancake wasn't liquid glass only introduced last year from apple?
@pancake delta chat doesn't feel native on Android and iOS for you? Or do you mean desktop platforms?
The recordings of our #FOSDEM talks are both released by now :)
Saturday's talk about #autocrypt2:
https://fosdem.org/2026/schedule/event/TV7GCC-autocrypt_2_post-quantum-cryptography_and_reliable_deletion_forward-secrecy/
Sunday's talk about the #multirelay future […]
@daniel We are currently in the process of removing three "legacy options" and it definitely costs us at least 100 times more effort that it took to introduce them.
#DeltaChat breaks the one app, one ID rule of phone-number-based apps by supporting multiple chat profiles. This allows for true private messaging where you can keep a public identity for the Web or Fediverse separate from a private one for family and friends. Managing multiple selves is a new […]
The total privacy of #DeltaChat has a trade-off: there is no global directory. Connecting for private messaging requires a direct QR scan or using an existing channel to exchange invite links. The hurdle is often the readiness of friends, family, or those around you to switch. However, once […]
While platforms like #Matrix or #Signal manage user identities on a server, #DeltaChat and #Chatmail are not platforms in the classic sense. They operate without a central registry, meaning there is no central gatekeeper to grant or deny access. This setup for private messaging naturally […]
The migration completed successfully, everything should be back to normal now.
PSA: The default relay server nine.testrun.org will be down for 15-30 minutes for another migration starting 11:00 CET.
We engage with decentralization protocols a lot (many nerds love to) but make no mistake: in the end, the app needs to work and be easy to use.
#deltachat is a cross-platform FOSS offering, with guaranteed security levels, close to user expectations ... major factors in driving adoption!
True […]
It took a while but it's shaping up nicely :) Post-Quantum Cryptography and Reliable Deletion, better known as Forward Secrecy, are going to become available in 2026 in #deltachat. For more details, including the recent #fosdem26 talk recording:
https://autocrypt2.org
A lot of messaging systems try to reinvent the email system but many (signal, matrix, xmpp) took over one key traditional design which we actually dropped while retaining SMTP/IMAP compatibility: server-controlled identities.
With #chatmail user identities are cryptographic and reside on end […]
Our second #FOSDEM talk is about to start: Hocuri talks about the upcoming #multirelay profiles, which use more than one address to exchange messages!
Live Stream is here:
https://live.fosdem.org/watch/ud2218a
@liaizon @matrix @swf @Bonfire @xmpp fwiw some of us just launched autocrypt2 today, a new transport-independent e2e scheme to do PQC and reliable deletion (forward secrecy), based on clock based instead of message based key ratcheting […]
person drawing a QR code on a chalkboard
Ever wondering where the QR codes in #deltachat come from? each of them is handmade, as everything in delta :) #fosdem
Now in the #FOSDEM live stream: Holger Krekel introducing #autocrypt2, a mechanism to protect against store-now-decrypt-later attacks, to be introduced in Delta!
https://live.fosdem.org/watch/k4201
More details about the talk […]
Several of our teams will be at #fosdem26 ... we'll introduce our PQC and Reliable Deletion ("forward secrecy") efforts, and give an overview over multi-relay #chatmail architectures. Or catch us on the booth or some sunny place outside :)
https://delta.chat/fosdem26.html
invite link for […]
@tizianomattei @keverets
There are already more relays,
https://chatmail.at/relays lists some of them. This page is reachable through the "Use other server" option during profile creation. At the end of the page there is a link to https://chatmail.at/doc/relay/ with the documentation on setting […]
@keverets Tap Create new profile -> Use other server -> Use classic email as relay, there you can enter email credentials of your own server.
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 https://webxdc.org/apps and for development docs https://webxdc.org/docs
And for development tooling
https://GitHub.com/webxdc/webxdc-dev which simulates […]
#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 […]
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 https://chatmail.at/relays
Or setup a relay […]
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 […]
several people reporting lately that #deltachat has become their main app: They are now spending more time in the chats, also with web apps, than in any other app. It may be a turn to more private communications when social media has become more toxic, obnoxious and dangerous in many places? […]
We are looking for an experienced Android UI developer for https://github.com/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 https://github.com/chatmail/core
Remote collab is […]
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
- […]
me: wanna try #deltachat with me? here's a invite link! most people including grandparents 💜 got it working nice that was pretty easy thx! computer people 🫠 wait, can i import my key? can't seem to get that working. sometimes i also get a message on thunderbird first before delta chat know why that's happening? i also read on hacker news that gpg should never be used for secure communication i don't know if i trust this. i can't seem to chat with my gmail acct i thought this was just email?
It's true: the more technical background and pre-conceptions you have, the more more likely you run into trouble with #deltachat 😂
Don't think so much! 😉