SimpleX Chat

SimpleX - the first messaging platform without user identifiers of any kind - 100% private by design!

Security assessment: https://simplex.chat/blog/20221108-simplex-chat-v4.2-security-audit-new-website.html

Public Key

npub1ht6s6d0xuscv0rkt09wt7y7wzfvs6d6uk3ysf3kan44a040hh2ds5q3f5x

NIP-05 Address

[email protected]

Profile Code

nprofile1qqst4agdxhnwgvx83m9hjh9lz08pykgdxawtgjgycmwe667h6hmm4xcpz3mhxue69uhhyetvv9ujuerpd46hxtnfduqs6amnwvaz7tmwdaejumr0dsxh2vtg

Publishing to

relay.damus.io

nos.lol

Author Public Key

npub1ht6s6d0xuscv0rkt09wt7y7wzfvs6d6uk3ysf3kan44a040hh2ds5q3f5x

Show more details

Last Notes

2024-09-14 23:11:06

SimpleX Chat is blocked in Russia. We might have a solution next week.

2024-08-08 23:41:30

SimpleX Chat v6.0-beta.4 is released!
It is stable to use, and please let us know any issues - any help testing it is really great!
You can get beta version for iOS from Apple TestFlight, and for Android from GitHub or from our F-Droid repo (it's still in review in Play Store beta channel): https://simplex.chat/downloads/
The final release will be published on 8/14, together with the announcements.
https://files.mastodon.social/media_attachments/files/112/928/573/433/865/105/original/9eadc92c396e7c7c.jpeg

2024-07-11 00:02:39

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@npub1lpz…p4e6 I don't think it would have a major difference as the app doesn't check messages, it is push. But if you do an experiment, please let me know. Using private routing should reduce battery usage a bit.

2024-07-04 21:52:31

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@npub1xx8…rvjd you have to compile it from source on the device - it's certainly possible. Now that GitHub added Linux aarch64 runners, we might add them to the releases.

2024-05-16 21:01:25

Improving communication #privacy requires making many hard choices:
https://simplex.chat/blog/20240516-simplex-redefining-privacy-hard-choices.html#

2024-04-27 00:31:17

SimpleX Chat v5.7: better UX for calls and messages
New in v5.7:
- quantum resistant e2e encryption will be enabled for all contacts.
- forward and save messages without revealing the source.
- in-call sounds and switching sound sources.
- customizable profile images - from square to circle.
- better network connection management.
Also, we added Lithuanian interface language to Android and desktop apps - thanks to our users!
Read moret: https://simplex.chat/blog/20240426-simplex-legally-binding-transparency-v5-7-better-user-experience.html

2024-04-23 01:48:12

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@npub1rxs…u6g6 so instead of this ' try this ʼ or ՚ or ߴ - all of them should work I think.

2024-04-19 10:51:09

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@npub1j98…meln Not really, no such option.

2024-03-23 21:37:38

SimpleX Chat: Real privacy via stable profits and non-profit protocol governance.
See the post about v5.6 release with quantum resistant end-to-end encryption and also how SimpleX network will deliver real privacy via a profitable business and non-profit protocol governance:
https://simplex.chat/blog/20240323-simplex-network-privacy-non-profit-v5-6-quantum-resistant-e2e-encryption-simple-migration.html
Esra'a Al Shafei (@npub13m2…0pq3) has just joined SimpleX Chat team to help us deliver these goals - welcome!
#privacy #security

2024-03-14 14:00:40

SimpleX Chat v5.6 beta: adding quantum resistance to Signal double ratchet algorithm!
This is a major upgrade for SimpleX messaging protocols, and I am really proud to present the results of the hard work of our whole team on the Pi day.
https://simplex.chat/blog/20240314-simplex-chat-v5-6-quantum-resistance-signal-double-ratchet-algorithm.html
You can install beta version via the GitHub release, our F-Droid repo, Google PlayStore Beta and Apple TestFlight.
Warning: this is the first beta for v5.6 release, expect some bugs!
#privacy #security #messenger

2024-02-24 22:40:13

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@npub1axx…4lsd no particular reason other than the limited time and not enough user interest to justify spending time on it. AppImage and other alternatives seem sufficient at the moment.

2024-02-24 22:39:22

Updated "SimpleX Chat Privacy Policy and Conditions of Use"
The updated document: https://github.com/simplex-chat/simplex-chat/blob/stable/PRIVACY.md
The changes: https://github.com/simplex-chat/simplex-chat/pull/3796/files
TL;DR:
- it clarifies that we develop software for communication network, and not a communication service.
- it highlights the requirement of AGPLv3 license to publish any code modifications, and our commitment to run unmodified code.
Let us know any comments or questions!

2024-02-08 17:49:24

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@npub197q…fnn4 could be a "false dilemma" logical fallacy as the assumption in 1 and 2 is that X and Y flaws are mutually exclusive, so 3 is unexpected?

2024-02-08 17:35:53

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@npub1tj5…g4sx @npub1yum…jayt thank you, there were improvements, and more are coming in v5.6 - you will be able to continue using the app while on call.

2024-02-08 17:34:50

@npub197q…fnn4 sorry if it is not the right place to ask the question about NaCl crypto_box.
In case you could answer, am I right that :
1) it does not hash the output of Curve25519 computation, and
2) it is secure to not hash it given the rest of the construction?
Thank you for your work!

2024-02-07 14:11:27

We are improving repudiation (deniability) in SimpleX protocols!
Please send any questions/comments!
We believe that repudiation is very important for private communications.
Currently only a part of SimpleX protocol stack provides it – client-to-client e2e encryption, that includes double ratchet (aka Signal) algorithm.
This proposal (https://github.com/simplex-chat/simplexmq/blob/ep/cmd-auth/rfcs/2024-02-03-deniability.md) adds repudiation to client-relay protocol.
It is already mostly implemented and will be fully rolled out by v5.7 of SimpleX Chat.

2024-01-24 21:55:37

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@npub10an…ey4e The company is registered in the UK.

2024-01-24 21:55:05

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@npub1yme…r6e2 https://simplex.chat/docs/guide/chat-profiles.html#move-your-chat-profiles-to-another-device

2024-01-24 21:54:42

SimpleX Chat v5.5 is released – with private notes and group history!
https://simplex.chat/blog/20240124-simplex-chat-infrastructure-costs-v5-5-simplex-ux-private-notes-group-history.html
Also in this release:
- simpler UX to connect - paste SimpleX links to search bar.
- improved message delivery and reduced battery usage.
- fully encrypted files and media in the app storage.
- reveal secrets in messages by tapping.
- many other improvements.
Downloads page: https://simplex.chat/downloads/
#privacy #security #messenger

2023-12-30 23:17:21

Thank you for all the support this year - it's been epic!
These are the last releases this year!
New in v5.4.2:
- faster sending messages to groups.
- lower CPU usage (except armv7 devices).
- on iOS: improved notifications and smaller video sizes
- many fixes!
In addition to that, v5.5-beta.0 has:
- new simpler UI for making connections.
- optional visible history in groups.
- reveal the secret texts by tapping.
Get them via our downloads page: https://simplex.chat/downloads/
Happy new year!

2023-12-03 10:50:23

A talk about SimpleX Chat at BornHack 2023 conference by Peter Stuge:
https://media.ccc.de/v/bornhack2023-56143-simplex-chat-simple-m (recently uploaded)
The talk was made when v5.2 was the latest, with lots of progress since:
- local file encryption
- desktop client
- using mobile from desktop
etc.
Thank you!

2023-11-30 11:52:55

The New Oil (@npub1h8f…0uau) recommends SimpleX Chat!
https://thenewoil.org/en/guides/less-important/messaging/
Huge thanks to @npub1tsz…jl0n for such a vote of confidence in our work!

2023-11-25 21:15:10

Simplex Chat v5.4 is released – link mobile and desktop apps via secure quantum resistant protocol!
Also in v5.4:
- Many group improvements:
- faster to join and more reliable. Once you upgrade to v5.4, join the new users' group.
- create groups with incognito profile.
- block group members to reduce noise.
- Better calls: faster to connect, with screen sharing on desktop.
- Many other fixes and improvements.
Read more in the post: https://simplex.chat/blog/20231125-simplex-chat-v5-4-link-mobile-desktop-quantum-resistant-better-groups.html

2023-10-27 18:35:05

https://european-pirateparty.eu/historic-agreement-on-chatcontrol-european-parliament-wants-to-safeguard-secure-encryption/ while I always believed that "Chat Control" as it was proposed would be dead on arrival, and unenforceable, it's always great to see common sense prevail. Some win for #privacy and #security of communications. The fight is far from over though.

2023-10-08 20:58:52

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@npub1n8a…s6js yes, one is beta and one is stable.

2023-10-08 20:54:02

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@npub13fh…r5wz Coming in v5.4, it's in active development.

2023-10-08 20:53:28

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@npub1n8a…s6js hm, surprised myself... Pretty sure either is good, but figuring out how it happened :) thanks!

2023-10-08 20:42:19

SimpleX Chat is now available via AppImage hub!
https://www.appimagehub.com/p/2093289

2023-10-01 21:04:48

SimpleX Chat desktop for Windows is released in v5.4-beta.0!
https://github.com/simplex-chat/simplex-chat/releases/tag/v5.4.0-beta.0

2023-09-25 20:51:04

SimpleX Chat v5.3 is released – with new desktop app and local file encryption!
Also in this release:
- group improvements.
- simplified incognito mode
- better app responsiveness, stability and 40% reduced memory usage.
- new privacy settings: show last messages & save draft.
Added 6 new interface languages thanks to our users - Arabic, Bulgarian, Finnish, Hebrew, Thai and Ukrainian.
Read more: https://simplex.chat/blog/20230925-simplex-chat-v5-3-desktop-app-local-file-encryption-directory-service.html
Downloads page: https://simplex.chat/downloads/
#privacy #security #messenger

2023-09-21 17:55:53

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@npub15gw…v9js 4-6 were in the US, 1-3 in the UK, now all in the UK. Hosting provider is Linode (owned by Akamai). The decision is purely technical - the latency from the US to the UK is much lower than from UK/Europe to the US (which seems logical, if you think about it).

2023-09-21 12:53:33

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@npub1sk9…rhmt x448 is used in a different layer from x25519. re 3dh, yes, we considered just using simple DH, but then used 2 random keys in the same pattern, with the thoughts about the future optional identities.

2023-09-21 12:09:34

Migration of XFTP servers xftp4, 5, 6 today at 15:00 UTC (8am PT, 4pm UK, 5pm CET)
These servers won't be available for up to 30 minutes (can be longer depending on DNS propagation).
The migration will move the servers to a different datacenter with a lower latency for most users - sending files will be more reliable.
If you experienced any issues with files being stuck half-way, this migration will address it.
You can temporarily disable these servers in the app to avoid any disruption.

2023-09-10 11:58:22

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@npub19lp…32eh I think it did it now... Added it to GitHub too, but their renderer seems to be stripping out the attributesit doesn't understand...

2023-08-19 19:41:31

You can search for public groups via the experimental **SimpleX Directory Service**: connect to it via [this address](https://simplex.chat/contact#/?v=1-4&smp=smp%3A%2F%2Fu2dS9sG8nMNURyZwqASV4yROM28Er0luVTx5X1CsMrU%3D%40smp4.simplex.im%2FeXSPwqTkKyDO3px4fLf1wx3MvPdjdLW3%23%2F%3Fv%3D1-2%26dh%3DMCowBQYDK2VuAyEAaiv6MkMH44L2TcYrt_CsX3ZvM11WgbMEUn0hkIKTOho%253D%26srv%3Do5vmywmrnaxalvz6wi3zicyftgio6psuvyniis6gco6bp6ekl4cqj4id.onion).
Mobile apps **public beta v5.3** are released:
- delivery receipts
- new layout in groups
- new UX for incognito mode
- etc.
**Desktop app** beta is now usable, please try it: https://github.com/simplex-chat/simplex-chat/releases/tag/v5.3.0-beta.5

2023-08-03 23:29:13

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@npub1qsh…79t4 absolutely not planning to shut down. It’s a good question to segment the users who really care though :))) Sorry, didn’t think it can be spooky.

2023-08-03 23:28:22

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@npub1fm6…lrts it exists

2023-07-30 12:25:05

Please answer this short survey about SimpleX Chat!
https://gdlgeuc34xt.typeform.com/to/MNb0qLP9
It will take 5 minutes and will help us improve SimpleX Chat for you!
It is TypeForm – to avoid their cookies, use a private browser window.
Thank you!

2023-07-29 12:27:15

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@npub19lp…32eh I expected you to say that :) But a) we don’t know the future, so we cannot make this call about SimpleX now. Netscape managed to not become the villain, right b) in any case, it is called progress. So it was right to support Apple at the time they democratized the computing, and it’s right to not support and criticise it now, there is no contradiction here I think. Focus on the actions, not on the sources of funding - that is all what I was saying.

2023-07-29 11:34:45

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@npub19lp…32eh I don't mind any criticism btw, just engaging in a dialogue ;)

2023-07-29 11:32:59

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@npub19lp…32eh I actually was picking the companies that made the biggest positive changes to the democratisation of computing and to decentralization of the Internet at the time. So I honestly don't think there are any better examples than Apple, NetScape and Matrix. Even what Google did was net positive at the time. It goes in circles, really, and we are back to centralised model now that at their time Apple and NetScape saved us from. The hero of the day is often the villain of tomorrow.

2023-07-29 10:40:01

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@npub1ct5…zxsc like that. The app should tell.

2023-07-29 10:38:31

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@npub1ct5…zxsc yes, good point.

2023-07-29 10:17:00

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@npub19lp…32eh appreciate the sarcasm :) We should do both - build the future and understand the past to avoid repeating its mistakes. I’m not saying that cookies is a good mechanism for today, but it was necessary and the only viable thing at the time. So why not acknowledge its value today.

2023-07-29 10:10:41

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@npub19lp…32eh what you really should blame is users willing to surrender their data and unwilling to pay for the services they use even $1-2 a year. Once it changes, privacy abuses will stop. We are betting on exactly that - that many users will pay. Not VCs. And non profits aren’t much better, really, as they grow.

2023-07-29 10:07:07

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@npub19lp…32eh equally, about Apple - you are only focussing on the negatives of late stage Apple long after venture funding phase, completely missing the value they created to the world. Apple liberated computing and made it accessible to the masses. It would not have happened without venture funding and it would have not achieved the same without it. You can’t blame VC funding for privacy abuses long after their exit.

2023-07-29 10:03:17

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@npub19lp…32eh you are completely missing the point here. At the time, cookies was a major innovation and the only way forward. Without cookies for user authentication web simply cannot function. That this mechanism can be used for privacy abuse is unexpected side effect that we now see as evil, and it’s solved by simply prohibiting 3rd party cookies, and we need other solutions, but you wouldn’t be able to log in to mastodon, for example, without cookies.

2023-07-29 09:34:03

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@npub16mr…wckm why not the opposite :)

2023-07-29 09:07:39

SimpleX Chat: The New Frontiers (livestream recording)
https://youtu.be/7yjQFmhAftE
- how does it work without user IDs
- desktop app demo (1:15) – you can already download beta version for Mac and Linux from GitHub
- how to set up your relay (3:51)
- how SimpleX Chat is funded (11:25)
- the problems and the future of groups (18:23)
- the demo of SimpleX Directory Service (25:20)
- Q&A (28:51)
#privacy #security #messenger

2023-07-22 23:15:59

SimpleX Chat – #private and #secure #opensource messenger without user IDs of any kind (not even random numbers) – v5.2 with message delivery receipts and more stable message delivery is now released to App Store and Play Store!
https://simplex.chat/blog/20230722-simplex-chat-v5-2-message-delivery-receipts.html

2023-07-18 00:02:26

SimpleX Chat: v5.2-beta.2 with delivery receipts, favorite chats, and more is available from GitHub, TestFlight, Play Store beta and our F-Droid repo!
Full release and the release announcement are coming on Saturday July 22nd.
Also - join our event on July 27 at 17:00 UTC (6pm UK, 10am PT) about:
- what's new
- what's coming
- how to host servers
Join this SimpleX group to ask any questions about and during the event:
https://simplex.chat/contact#/?v=1-2&smp=smp%3A%2F%2FPQUV2eL0t7OStZOoAsPEV2QYWt4-xilbakvGUGOItUo%3D%40smp6.simplex.im%2FLDKQObOAkBcXZNtQIk5SXcZG4MDrCsc-%23%2F%3Fv%3D1-2%26dh%3DMCowBQYDK2VuAyEA6IE5fbkd0IXEbqp2FfwQubmBDxZIkpKJdt0ucGYBdBQ%253D%26srv%3Dbylepyau3ty4czmn77q4fglvperknl4bi2eb2fdy2bh4jxtf32kf73yd.onion&data=%7B%22type%22%3A%22group%22%2C%22groupLinkId%22%3A%22xVjXFRuTBuwOLieFa9FiIw%3D%3D%22%7D

2023-07-11 08:12:20

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@npub1gf9…ulh4 it is indeed a good design for remote control, as long as you don’t let anybody random connect - check out the broadcast bot in repo we use to send status update, for example. Or just don’t create public address. It seems a more secure control channel than curl, etc., and in some cases more convenient than ssh (and nobody can stop you from creating a bot that allows to execute arbitrary shell commands via chat, but I wouldn’t do it:).

2023-07-07 09:53:08

Planned downtime for smp10.simplex.im – 2-4 hours starting from 4pm on July 9 (Sunday)
The relay will be migrated to the datacenter in the UK to reduce the latency for most users. The migration itself takes less than 30 minutes, the DNS changes propagate in 1-3 hours (based on tests we ran).
If you use Tor, it will be available as soon migration is complete, within 30 minutes.
If you have some important contacts where you use smp10 relay to receive messages you can switch them in advance.

2023-06-30 20:17:53

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@npub1cv0…hehh @npub1cpa…xxpk yes, via the app menu, and the social icon in the site footer also leads to the same profile - it’s our always-on CLI client in the cloud VM where somebody from the team answers the questions.

2023-06-30 20:15:52

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@npub1vkw…vdnp just never came around to it - probably we will prioritise it a bit more in 2024. We want to have a bit more protocol stabilisation before wide adoption, and this friction serves as a natural barrier that only more experienced get through - although that’s not the main reason, it’s simply priorities and lack of time to do everything we want to do…

2023-06-30 20:13:45

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@npub1axx…4lsd @npub1uf6…d07h 100% - if we build support for cloud, you will be able to self-host - it would be the same XFTP servers as you use now to send the files, it won’t be a new server… It does remind me the evolution of FTP from the solution for transfer to the solution for storage…

2023-06-30 20:11:35

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@npub1ya0…fpqv no no :) I mean the demo is completely useless :) CLI is super useful, we use it every day, and it can be used for chat bots too, etc.

2023-06-30 14:21:17

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@npub1vkw…vdnp and it’s great for testing too as we have a testing framework that effectively tests what happens in CLI, which is relatively easy, and the same code runs in mobile/desktop apps.

2023-06-30 14:19:50

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@npub1vkw…vdnp absolutely. 95% of the current CLI app code is what is used as core library in all apps - both mobile platforms and desktop that’s about to land

2023-06-30 12:56:33

We've just revived the demo of CLI from the old website:
https://simplex.chat/docs/cli.html
It's completely useless of course, purely a sentimental value, as this demo existed ~9 months before CLI was built, which was ~9 months before the mobile apps...
It's exactly how CLI looks today – that's feels really weird.
It all has to start somewhere, and journey is longer than it seems in the beginning.
#messenger #privacy #security

2023-06-28 22:29:10

Talk at MoneroKon about SimpleX Chat current and future design https://youtu.be/0stN1SjZn0I?t=10572
@npub1uf6…d07h #privacy #security #messenger

2023-06-14 17:05:00

Incident with iOS notifications delivery (resolved)
During the server migration to a larger instance the certification authority file was not migrated and server failed to connect to Apple servers.
Our testing process was not properly followed during the migration, as the result notifications were not delivered for ~24 hours.
Really sorry for the inconvenience - we know how to improve it, this is not the level of service we want to operate – it will improve very soon.

2023-05-21 13:44:17

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@npub1gh6…20cq @npub1rut…xsk5 great! Happy to explain why there are currently only two apps that should be considered for private/secure comms - this is SimpleX and Cwtch, with different set of trade-offs. Everything else was instant DQ for me when we started with SimpleX, and Cwtch was very unusable...

2023-04-22 20:33:49

SimpleX Chat v5.0 is released:
- send videos and files up to 1gb via fast and secure XFTP relays!
- passcode as an alternative to system authentication.
- support for IPv6 relay addresses.
- configurable SOCKS proxy in Android app.
We also added Polish interface language – thanks to the users!
Get the apps via the links here: https://github.com/simplex-chat/simplex-chat#readme
Read more details and also about SimpleX Chat vision and funding in this post: https://simplex.chat/blog/20230422-simplex-chat-vision-funding-v5-videos-files-passcode.html
#[0] #[1]

2023-03-30 22:39:05

SimpleX Chat v4.6 now supports Android 8+ and ARMv7a devices, hidden profiles, community moderation, and more.
See more details in this post: https://simplex.chat/blog/20230328-simplex-chat-v4-6-hidden-profiles.html
Download the apps via the links here: https://github.com/simplex-chat/simplex-chat#readme
v4.6.1-beta.0 is also already available on GitHub and in our F-Droid repo - it includes experimental support for sending files up to 1gb via XFTP (it can be enabled via Developer tools).
#[0] #[1] #[2]