Delta Chat
@delta@chaos.social
Secure decentralized messaging for all major platforms and then some. Reliable and instant by using fast and secure Chatmail servers, but also compatible with classic e-mail providers. Offering chat-shared web apps for fun and collaboration, end-to-end encrypted and without any server side hosting. Security-Audited multiple times, last in 2024. #deltachat #chatmail #webxdc #FOSS #OpenPGP #p2p
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@Hiro Annoying sync times/processing after longer offline times is a known problem for heavy users of delta, and you are not alone having it. So far it hasn't been prioritized because focus is still on removing obstacles and making it easier for people who freshly join.
@pancake delta chat doesn't feel native on Android and iOS for you? Or do you mean desktop platforms?
@pancake wasn't liquid glass only introduced last year from apple?
@hanscees yes, email servers are used as relays (chatmail) only. They are store-and-forward servers just like signals hyperscale servers (Amazon, google, ...)
Delta single device users will delete the server side copy after receiving the message. For multi device setups messages are queued for 20-40 days, and then unconditionally deleted on relays.
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, the email system is not necessarily better than #xmpp ... but please compare with http://chatmail.at which is fast, ephemeral and secure, with delta inherently being a peer-to-peer E2EE messenger :)
What do you think is currently the most interesting decentralized messaging system when Signal and its server infrastructure would be more severely disrupted tomorrow?
@d1 In case you are interested, this is the paper that found that deniability is ineffective for
the people who may need it, and that most users prefer non-repudiation
over deniability: https://www.usenix.org/system/files/usenixsecurity23-yadav.pdf
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
Recording will be available here later: https://fosdem.org/2026/schedule/event/3F9VTU-deltachat-chatmail-relays-multi-transport/
Now in the #FOSDEM live stream: Holger 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:
https://fosdem.org/2026/schedule/event/TV7GCC-autocrypt_2_post-quantum-cryptography_and_reliable_deletion_forward-secrecy/
#DeltaChat #forwardsecrey #reliabledeletion
@keverets Tap Create new profile -> Use other server -> Use classic email as relay, there you can enter email credentials of your own server.