Delta Chat

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. #chatmail #FOSS #OpenPGP #deltachat #fedi22 #webxdc #p2p

2025-05-04

@pvagner @erion it's correct that the current chatmail relays require port 25 to be reachable. There are some discussions around other server-to-server transports, reflected in github.com/chatmail/relay/issu even if mostly talks about Tor. The email system is traditionally pretty flexible about transports, especially server-to-server ones. There are also some deployments that use uucp for long range radio based transporting between MTAs.

2025-05-04

@pvagner not the least because @WofWca @treefit @r10s and @adbenitez care for #deltachat #a11y for some years now šŸ’—

Delta Chat boosted:
Peter VƔgnerpvagner@fedi.ml
2025-05-04

More and more I am looking through @delta apps and resources I believe this should become number one messenger of choice for screen reader users.
The developers are constantly improving its #a11y. It's secure from the start of using.
Additionally the desktop chat has under gone an #accessibility audit and accessibility issues are clearly documented in public.
I am not sure other messenger style app on the planet has such dedicated commitment to accessibility ever.

github.com/deltachat/deltachat…

2025-05-04

@scott @peter nobody needs a pre existing email address. You can just hit "create profile" and get (a random) #chatmail address. If you create a first group, then in the members list there is an "invite" you can show for qr scanning or give as a link, and receivers then join this group.

You can also use a pre existing email address but we strongly recommend to use a dedicated E-Mail address then and not share it with regular classic email usage.

2025-05-04

@scott @peter if you need any advise or support let us know :) We particular recommend onboarding with a pre-existing group because then the biggest roadblock, "who can I chat with", is mitigated. Many families, little orgs and ad-hoc groups like attendees in a conference talk, successfully started using #deltachat this way and particularly appreciated #webxdc apps that provide an in-chat interactive experience.

2025-05-03

@rakoo surely, "trust" is a highly problematic term. It's not only Delta Chat developers, but also the many packaged dependencies, along with the operating system environments our apps run in, which the "trustability" of the overall messaging UX depends on. But the argument from @gordon correctly states that end-to-end #cryptography helps to not have to trust all the intermediate machines messages are passing through.

2025-05-03

1 cent per five years .... is the current marginal hosting cost for a #chatmail address, with which #deltachat apps facilitate world-wide private messaging including interactive #webxdc apps that run end-to-end encrypted in any chat group.

<1 Million EUR per year is the estimated marginal hosting costs for 350 Million EU citizens. Such scaling requires, however, research and development, including careful UX and #cryptography work. Related writing from @gordon

newsletter.squishy.computer/p/

screenshot of key excerpt from the referenced post:

"When the network is built on cryptographic protocols, we don’t have to trust anything in-between. We don’t have to trust the computers, the wires, the institutions, beliefs, or kinship of the network participants. We can trust the math. All we have to do is verify the message with cryptography.

This is a powerful primitive for scaling trust, because it means everyone on the network can cooperate together, even if they don’t trust each-other. The costs to producing high-trust results are greatly reduced, and we can spend our coordination efforts on building larger, more fine-grained, more complex networks of cooperation."
2025-05-02

@deancommasteven Desktop version already has themes, some of them are with IRC/Discord/Mattermost-like UI.

2025-05-02

@deancommasteven that'd be quite some effort. Delta Chat is more geared towards WhatsApp/Signal/Telegram style user interfaces, and the billions of people using it certainly chat a lot, and also with shorter messages. There are some alternative clients, where you might try your luck, for example github.com/ArcaneChat/arcanech -- see full list chatmail.at/clients

2025-05-02

@ajnn between two profiles: go to one profile and the "QR" symbol, and "copy" the invite link. Then go to the other profile, and go to "QR" code symbol, hit "scan" and then in the extra menu "paste invite link".

2025-05-02

Yesterday, 20 people from the safesisters.org community onboarded with #DeltaChat in Lusaka, Zambia. Everything worked! Usability, privacy and #OfflineFirst ops were appreciated and #webxdc app based organizing met strong interest. Many participants engage in addressing challenges from surveillance state actors, family and partner abuse. Moreover, people with visual impairment were happy about Android's screen reader support.

It's events like this that validate our efforts!

#africa

Photo of a group of black women gathering in a conference room in Lusaka, Zambia. There is a group of people standing in the back, as well as several sitting in front of tables, as well as and on the side.  The picture was shot while onboarding with Delta Chat Android took place, and people in the picture consented to publishing.
2025-05-02

@strk setting "delete at once after download" in a multi-device setup does not work. We could at least present a warning if you try to do that. Feel free to open a support.delta.chat topic to settle the details, or suggest other approaches.

2025-05-02

@farooqkz there is large variety yes! Nadia Eghbal wrote "working in public" covering a large variety of how Foss projects evolve btw.

2025-05-01

@wowaname

As to attacks:, there is legal prosecution and repression for some in our community, also towards several user groups we communicate with. We will not make this public even though it influences our designs.

A lot of our FOSS work is public. Many contributors engage also in the forum, and discuss current considerations.

Lastly, whether people feel welcome and can understand and influence the project, participate in its various directions, is best determined by those involved.

2025-05-01

@wowaname The idea of "total transparency" may sound good on paper but a FOSS community is not a state. We do not command police, and we cant access private data from people. Anyone is free to not use our software, or take our public offerings and fork them without our permission. In turn, there is no need to open up all of our diverse and distributed discussions to the public. What counts is that diverse contributors and supporters feel welcome, gain insights and agency over time, factually.

2025-05-01

@cursecatsupdairy aeap is disabled in current releaes but will soon reappear in a new and better form ;)

2025-05-01

Many larger FOSS projects publish team profiles with titles and roles, presidents and heads, and leads of this and that.

Does a FOSS community need that to thrive and deliver?

We work a lot in public: Git repositories, PR flows, conference talks and sessions, support forum discussions, blogs and fediverse posts.

There are also many private invite-only contributor group chats, invisible to attackers, where people typically have met in person and know each other.
No kings or votes ;)

Delta Chat boosted:
šŸ¦† √ šŸ„ Laempel@social.selbstlernserver.de
2025-05-01
2025-04-30

@kskarthik we are aware of the importance of native calls for mass usage. Webrtc is discussed and also
@n0iroh based solutions because we use it already for P2P #webxdc realtime data channels. But someone experienced with #rustlang focusing on this call area would be helpful, and could lead to relatively quick results, likely.

2025-04-30

We have several ground breaking developments going on in the background, and frankly, it's sometimes hard to not pre-announce them excitedly :)

However, we struggle to acquire public funding after the OTF contract broke away in February. Current need is around ~50K per month for ~10 people. , and we would like to support some contributors to switch their day job.

Fallback: even if funding dries up, #deltachat is bound to continue to work. It's pretty maintainable and intrinsically motivated.

Client Info

Server: https://mastodon.social
Version: 2025.04
Repository: https://github.com/cyevgeniy/lmst