The pattern of fungible digital infrastructure really is quite interesting.

By that I mean relays in Nostr & #DeltaChat and transport neutrality like #Mitra Mini & Manyverse.

We don't think any institution or state has the right to prevent families and friends from private chatting, physically or digitally. But the Cyber Authority China (CaC) seems to take offense:

- they made Apple remove #deltachat iOS for mainland china

- their great firewall appears to block some #chatmail relays

- if you ask DeepSeek directly about Delta Chat, it doesn't want to talk

It's pretty sad, really. Everybody on this planet needs, and has a human right to private communication.

Alt...

DeepSeek conversation snapshot: can you tell me about Delta Chat? > Sorry, that's beyond my current scope. Let's talk about something else. what??? why??? Delta Chat the open source messenger app > Sorry, that's beyond my current scope. Let's talk about something else.

I first tried Delta Chat 5–6 years ago. Back then it felt a bit complicated compared to mainstream messengers. Still, the idea was brilliant — and today it has grown into one of the most interesting privacy tools out there.

Delta Chat is a truly decentralized messenger that runs on top of regular email. No company servers, no phone number required. Just connect your existing mailbox (any provider) and chat with end-to-end encryption.

Why it stands out:

Works on any email server — extremely hard to block
Automatic E2EE between Delta Chat users
WebXDC — interactive mini-apps inside chats (games, polls, boards, etc.)
Chatmail servers for fast delivery and push notifications
Fully open source & open standard
Available on Android, iOS, Windows, macOS, Linux

Perfect for privacy-conscious people, activists, journalists, and anyone who wants communication resilience.
Yes, it has some rough edges (depends on your email provider, first contact can hit spam), but the independence it gives is worth it.
Have you tried it? What do you think?
🔗 https://delta.chat
#DeltaChat #Decentralization #Privacy #OpenSource #Fediverse #Chatmail #XMPPisDeadButEmailStillWorks

Alt...

deltachat

#ArcaneChat / #DeltaChat channel about developer memes, open/libre source culture and other techie and other nerdy stuff

https://i.delta.chat/#B68D965B65A63BBE7EB32D56234652E2C899213F&v=3&x=ImcSr1dp4fEWrZreS4Emlb5u&j=eX6UqJEePp9y_i-225abLctf&s=HdXiISGUcOr_1pcRoNTcOMwe&a=57cyvwkiidqqxnryms0q%40chat.in%2Dthe.eu&n=adb+%28TL%3BDR%29&b=Debugging+Memes

#programmers #developers #programmerjokes #developerjokes #programmerhumor #jokes #memes #nerd #developerhumor #opensource #libresoftware #nerdhumor #coding #emacs #linux #developer #programmer

This week in #FDroid (TWIF) was published the other day:

* Basic 2.0-alpha6 ready to translate #Weblate
* #ArcaneChat #DeltaChat at war with metadata
* #BasicSync for #Syncthing
* #Ente brings #EnteLocker
* #XBMC #Kodi update
* new #Lichess client
* #Threema does not want your metadata either
* #FMD teaches us #HSM app signing #Nitrokey #PKCS
+ 35 new apps
& 237 updates

What is metadata anyway? https://f-droid.org/2026/04/03/twif.html

This week in #FDroid (TWIF) is live:

* #calculators can't calculate
* #DeltaChat #ArcaneChat care about #metadata
* #Fennec Firefox has a notification
* #FMD and much #UnifiedPush news
* #FreeOTPplus long awaited update
* #Saracroche 1 year old
* #Schildichat back on track
* #Weblibre Firefox tricks
+ 17 new apps
& 190 updates
- two archived

Two plus two equals whatever: https://f-droid.org/2026/03/27/twif.html

OH in some chaos circles "#deltachat is the new emacs of operating systems" ...
We are not sure about that 😂 but what we do know is we are soon bringing out releases that we have been working towards for 12 months in multiple already released steps. The funniest thing? Nothing changes on the surface which was precisely what we worked for so long ... more soon, after internal testing and some pending bug fixes land :) and no worries, there will also be interesting visible changes. Stay tuned :)

@tinker @signalapp IMHO porting #Deltachat would be simpler, because it doesn't care about the phone number/SIM card, SMS verification, etc.

Delta Chat is a messaging platform that works over email.

Setup is similar to a email client.
Messaging is decentralized and interoperable.

Supports end-to-end encryption via PGP.
PGP encryption keys are created automatically.

Default desktop client is based on Electron.
Electron is based on the Google Chromium web browser.

Website: https://delta.chat
Mastodon: @delta

#DeltaChat #Messaging #Privacy #InfoSec #E2EE #OpenPGP #PGP #OpenSource #FOSS #CyberSecurity #Encryption #FreeSoftware

Alt...

Delta Chat logo.

oh shit, with #Autocrypt v2 being worked on, that means #Deltachat and other chatmail systems will have post-quantum security and full perfect forward secrecy support!

that means basically the only lingering issues I had with Deltachat as a personal messenger are completely gone

seriously go to https://delta.chat/ right now and try it out
encryption info:
https://delta.chat/en/help#e2ee
https://autocrypt2.org/#/

#Deltachat has one of the most robust post-server-compromise threat models of any modern chat platform, and I feel like not enough people understand or talk about this tbh

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 complicates invasive age verification. Without a public registry or user discovery, there is no technical hook to verify users. #Chatmail also enforces E2EE by rejecting all unencrypted data. ... (1/3)

@eff
NOCH BESSER:
Gleich auf dezentrale Dienste umsteigen, wie #Matrix oder #DeltaChat.
🧐

Is end to end encryption about to become irrelevant?

https://podcastindex.org/podcast/5718181?episode=32805109029

#e2ee #Signal #SignalApp #Matrix #xmpp #SessionMessenger #simplex #deltachat #privacy #Threema #WindowscCopilot #AppleIntelligence #MicrosoftcCopilot #encryption #surveillance

Quite a few of #deltachat #chatmail and #webxdc folks are already and will be around #39c3 -- on-site you can join a group chat (or send us a DM upfront) where we announce dynamically scheduled sessions. You'll find us mostly around Komona but also other places ... for more info:

https://delta.chat/39c3.html

PSA: Influenza is spreading heavily currently, and 30% of people are infectious without symptoms. Please maintain hygiene and at best test yourself before entering premises. Thanks!

Encrypted group chats are the third space of the current age. Community is where your chats at.
#JoanMastodon

#Signal #Matrix #DeltaChat #XMPP #Resist #Protest #Community #TTJ

This week in #FDroid (TWIF) is live:

* @marcprux caught on video
* Schedule your #39C3 #CCC visit
* Switching relays in #ArcaneChat #DeltaChat
* #Thunderbird drops #MaterialDesign3 🤯
+ 8 new apps
& 156 updates
- 1 app archived

Click play: https://f-droid.org/2025/12/11/twif.html

LOOK EVERYBODY,

It's a #sassy #hellthread that I took NO PART IN!

IT HAPPENS!!! SOMETIMES!?!?

https://mastodon.social/@murena/115656237852149287

P.S., slightly tempted to jump in, but now I can't because I wrote this. lol

#deltachat #xmpp #murena #debian #freebsd #SassyGrumpyPeople #NotMyFault

@Tutanota
You forgot #DeltaChat, which is an excellent alternative to WhatsApp.

@delta

@Tutanota #DeltaChat is truly one of the most secure with its decentralized servers.

@fuat2mb @delta_chat it's a neat idea to postpone server choice until later, and onboard with some default.

#deltachat apps are currently learning to use multiple addresses at once ("multi-transport"), along with cryptographic hardening against evil server operators. The goal is to provide multi-server onboarding by default, and to automate server migrations (although for a while there will be an advanced settings interface where it's manually managed). You'd be onboarding "to the network" :)

Self-hosted Delta Chat?

I've been thinking more about the hurtle of getting friends and family to use federated/self-hosted services. One of the issues to onboarding is people not "getting" the idea of picking an instance. This has led, in part, to "default" instances, like mastadon.social, that grow so large it almost defeates the idea.

I've been thinking that I really wish #DeltaChat had a web client. I have had a MUCH more difficult time getting folks to try that out than even #fediverse SNS. But I was thinking how the heck are you going to pull that off without @delta having to host the overhead for a robust web client and possibly host a gigantic server system that has to grow exponentially to keep everyone's email from all the possible email providers, really defeating the goal of their project.

This morning, I thought of a possible solution to both problems. What if you have a built-in transfer requirement. So you start with a default, say pleb.joinmastodon.org or noob.delta.chat and after a certain time (3 months or something) you have to either transfer to a new instance, including hosting your own client for in browser decryption web access to your encrypted mail chats or your account (in the case of #mastodon) or web client access (in the case of Delta Chat) is shut off.

Do you think this could work?

@delta_chat

@Tutanota elegiría mejor #DeltaChat

Quedó comprobado que #Signal utiliza los servidores de Amazon que, al momento de sufrir un colapso, la mensajería quedaría fuera de servicio.

This week in #FDroid (TWIF) is brought to you by SSSE3:

* Polish app guide? Fennec has great translations
* #ArcaneChat #DeltaChat w/ better onboarding
* #Kotatsu stopped development
* #Luanti #Minetest now on #OpenCollective
* #Notesnook caught up
* Anoher big #OSMAnd release
* #Session Messenger vs screenshots
* Repomaker at #DroidCon #Kampala
+ 15 new apps
& 197 updates
- 2 archived

And we have yet to unleash all its power: https://f-droid.org/2025/11/13/twif.html

We hereby challenge _all_ other messaging apps, FOSS or not, to provide a more convenient private onboarding experience than #deltachat

1. Install app
2. "Create new profile"
3. Enter nick name, tap "Agree and continue"
4. Tap "+" and "new contact" and provide/scan qr code/link

Voila! A secure private chat, familiar to those coming from Whatsapp or Telegram (without "AI", with #a11y).

Note: chat identities are private and can not be queried or discovered. Servers keep no track or metadata

Alt...

Start screen of https;//get.delta.chat apps which shows Delta chat logo (Greek letter delta) Secure decentralized chat "Create new profile" button highlighted

Alt...

Create profile screen With a field to enter a name ... "Fediverse chicken" was typed A link to the privacy policy of nine.testrun.org, the default onboarding chatmail relay A highlighted button "agree and continue" A button "use other server"

Alt...

Screenshot of newly created profile Title bar "fediverse chicken" Two chats in the chat list: "Device messages" with instructions how to setup contact with another chat profile "Saved messages" where you can "save" messages from other chats to memorize them

Signal's president claimed it takes billions to replicate the availability and reliability of "hyperscalers" (AWS/Google/Microsoft/Cloudfare) that Signal uses.

#chatmail and #deltachat are about disproving this claim by

1) making relays super cheap (DONE)

2) enabling chat profiles to use multiple relays redundantly (WIP)

3) distributing relay knowledge among chatters (TBD).

Fat servers, corporate overlords and billionaires: not needed and better to not exist for a convivial e2ee future :)

Not taking Venture Capital money means:

- No pressure to maximize monetization of usage (for every million of VC funding you need to find ~100+ Million in value later).

- No prioritization of growing fast with PR campaigns that promise the moon and stumble on the ground

- No billionaire who ultimately profits

Instead, we seek public funding and private contributions for #chatmail #deltachat and #webxdc developments.

Thanks to everyone who is helping and already test-driving things :)

Alt...

home page picture of https://testrun.org text title "Testrun.org" with the sub title "experimenting with the future of Email" the picture is a collage and shows the head of a dinosaur with an open mouth and many teeth trying to swallow a Zeppelin that seems to be flying directly into the mouth. Next to the dinosaur head is a classic "@" email symbol. the middle part is blue, and has overlay graphics of a moon-like planet and some old computers in the back the bottom part contains a picture of a sysadmin ca. 1975 in front of computer screens that show green letters on a black screen. There also are separately three cryptic letter chains that seem to translate to "Communications", "Command" and "Sigma". Another "@" sign is left of the computer screens.

@nixCraft #DeltaChat is right there, folks

Anyone who expects me to install yet another app for their garbage can kindly fuck off!

• Fix your shit and give me a compelling reason to even consider making an account in the first place.

I won't but seeing folks who actually take privacy serious and thus have their #cameras removed from their #Android device struggle makes me fucking angry.

• By comparison: @monocles / #monoclesChat has actually good #support and they don't ask for #PII like a #PhoneNumber and allow for #SelfCustody of all the keys.

Personally, I wished @delta / #deltaChat had a plugin for like @thunderbird / #Thunderbird so that it can be used as #Chat in it and sort the inbox. Would make it the superior solution for #corporations that already have #eMail #Archival setup for legal compliance…

Anyone have opinion on these...

➡️ #DeltaChat ❓ @delta / https://delta.chat/
➡️ #Session ❓ https://getsession.org/download
➡️ #xmpp ❓ @xmpp
➡️ #signal ❓ @signalapp
engages in #Shitcoin-#Scams (see #MobileCoin!) for no valid reason…?
➡️ #Matrix
➡️ #SimpleX,
➡️ #Zulip
➡️ #Mattermost
➡️ #Briar @briar ➡️ #Cwtch @cwtch
➡️ #IRC
➡️ #Quiet
➡️ #Jami
➡️ #Jitsi Meet ( ❤️⭐ my favourite) @jitsinews
➡️ Mumble
➡️ #MonoclesChat @monocles.social
➡️ #Linphone
➡️ #XMPP + #OMEMO)

#Encryption #Cypherpunk #E2EE
#InternetCalls #Calls #Privacy

[please boost also - Thanks
#FreeSchool]

@craignewmark Maybe go hard on advocating for #PGP/MIME & #XMPP+#OMEMO?

• Espechally since @delta / #deltaChat & @thunderbird / #Thunderbird (PGP/MIME) as well as @gajim / #gajim & @monocles / #monoclesChat (XMPP+OMEMO) make real #E2EE (with #SelfCustody!) user-friendly.

Larry Ellison, owner of Oracle, CBS, CNN, and now, TikTok wants global data centralization and total surveillance: "Citizens will be on their best behavior because we're constantly watching & recording everything that's going on."

And I'm over here on #DeltaChat and #GoToSocial like 😎

@chris
Ich glaube die Desktop-App für #Deltachat wird grundsätzlich über Flatpack ausgeliefert. Läuft bei mit super, auch mit Video etc.

@Moni @chris
Wow, toll super! 👍

#Deltachat würde für alle #EU-Bürger zusammen 360000 Euro pro Jahr kosten.
Das wäre doch mal interessant! Statt ms alles hinterher zu werfen.

Deltachat hat bei stetiger Weiterentwicklung das Zeug zu einem sehr sicheren mobile-device-os oder -desktop zu werden, einfach aber sicher - so sehe ich das.

Wie kann man nach dem Vortrag nicht zu Deltachat wechseln wollen oder es zumindest mal ausprobieren 😀

Hier geht's lang zum Download:
https://delta.chat/de/download
(dort auch mal auf die Download-Optionen für andere Plattformen klicken, um mehr Möglichkeiten zu haben)

Und hier trifft man deltachat im Fediverse: @delta

Alt...

Ein grünes und ein blaues Quadrat nebeneinander. Links ist das WhatsApp-Symbol und sein Schriftzug darunter. Rechts ist das Delta Chat Symbol und sein Schriftzug darunter. In der Mitte zwischen beiden ist ein weißer, dicker Pfeil, der von WhatsApp zu Delta Chat zeigt.

@ferret THIS is why I don't trust anyone - espechally not #UsefulIdiots like @signalapp - and recommend everyone to use real #E2EE like #XMPP+#OMEMO & #PGP/MIME.

• Clients like @monocles / #monoclesChat & @gajim / #gajim as well as @delta / #deltaChat & @thunderbird / #Thunderbird make that super-easy.

Obviously, the highest security is having your own server under your bed to be able to yeet all data with a single command.

• And yes, I did also setup the latter for #ComSec in one case where being able to wipe an account remotely was necessary.