simplex
SimpleX Chat

Private, secure and decentralized messaging. The first network where you own your contacts and groups. Get the open-source app: https://simplex.chat/downloads

Public Key

npub1exv22uulqnmlluszc4yk92jhs2e5ajcs6mu3t00a6avzjcalj9csm7d828

NIP-05 Address

[email protected]

Profile Code

nprofile1qqsvnx99ww0sfall7gpv2jtz4ftc9v6wevgdd7g4hh7awkpfvwlezugpzemhxue69uhhyetvv9ujuurjd9kkzmpwdejhgv9jf0t

Publishing to

relay.primal.net

Author Public Key

npub1exv22uulqnmlluszc4yk92jhs2e5ajcs6mu3t00a6avzjcalj9csm7d828

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Last Notes

2026-03-08 19:18:21 UTC

SimpleX Chat apps are 4 years old today!
- 2M+ app downloads
- 300-500K active users (estimated from store statistics - no accounts or any user IDs)
- 1000+ network routers
Huge thank you to everybody who made this journey possible: @nprofile…lfze, @nprofile…ttls, @nprofile…mznq, @nprofile…kjqw @nprofile…zj6n and everybody else who used, promoted and supported SimpleX Network.
Coming soon:
- channels
- new UX
- non-profit governance of SimpleX Network
https://blossom.primal.net/41b693ed51dc1ab81667049fe1cc2f9416d612489c2d45e67b6196eca921d862.jpg
The first release announcement: https://simplex.chat/blog/20220308-simplex-chat-mobile-apps.html
How SimpleX Network Consortium will work: https://github.com/simplex-chat/simplexmq/tree/master/rfcs#readme
Why we are building SimpleX Network: https://simplex.chat/why/

2026-01-16 09:11:29 UTC

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You can say there are like 3 actual lines of code, the rest is boilerplate :)

2026-01-16 09:10:04 UTC

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Right :) But it requires marking the file as mjs or something.

2026-01-15 19:03:53 UTC

You can create a SimpleX Chat chat-bot with 17 lines of JS code using the new Node.js library
https://blossom.primal.net/b6c8f7f4c49248b09d2028ffe4ab57be8e7f56f74c57e6a45f62b7f3e28e97e8.jpg
Beta version: https://npmjs.com/package/simplex-chat/v/6.5.0-beta.4.4
Source code: https://github.com/simplex-chat/simplex-chat/tree/master/packages/simplex-chat-nodejs
To run this example with Node.js:
npm i [email protected]
node ./node_modules/simplex-chat/examples/squaring-bot-readme.js

2025-12-31 09:51:29 UTC

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Our experimental directory of groups: https://simplex.chat/directory/
Unofficial registry of SimpleX servers: https://simplex-directory.asriyan.me
SimpleX bots API and libraries: https://github.com/simplex-chat/simplex-chat/tree/master/bots#useful-bots
Our plan for Community Vouchers: https://simplex.chat/vouchers/ - you can get an access pass to test them once launched before the end of today.

2025-12-31 09:51:08 UTC

Happy New Year!
Thank you all for your incredible support of SimpleX network in 2025:
- to users for over 2,000,000 app downloads since launch.
- to enthusiasts for hundreds of community hosted servers.
- to group owners for thousands of groups.
- to businesses and projects using SimpleX Chat for customer and user support.
- to developers who created integrations and libraries for SimpleX network.
- to all who donated, and especially to Vitalik Buterin
for his game-changing donation of 128ETH.
2026 will be great for privacy and for SimpleX network!

2025-12-25 18:07:35 UTC

https://blossom.primal.net/0b20c68d251c5bede96567e1052eda3d0044af32bd7ee8de8f3796d426ba9341.jpg

2025-12-24 23:20:23 UTC

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is it yours?

2025-12-24 23:19:15 UTC

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🤦‍♂️ we don't plan the shitcoin, and never did that :)
It's a payment system for servers, no "coins" there, shit- or not.
Read https://simplex.chat/vouchers - it's been updated.
The plan is evolving - whitepaper is half-way done, the assessment of blockchain to build on is ongoing.

2025-12-24 23:16:35 UTC

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@nprofile…uvay is cool - they don't chase people to publish apps, they just do that. Thank you.

2025-12-24 23:11:39 UTC

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Is it? it's nice 😉 We can do that.

2025-12-24 23:05:51 UTC

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haven't seen it before :)

2025-12-24 22:56:55 UTC

A big news for SimpleX Chat privacy and security:
Android apps released via GitHub and F-Droid are now 100% reproducible!
It means that you can easily verify that the app is secure, even if the download site was hacked.
From v6.5 our release process is:
1) build Android apps on two independent machines and confirm they are 100% identical;
2) cryptographically "sign" them;
3) add signature files to the release page so you can verify.
v6.5 beta.3 release: https://github.com/simplex-chat/simplex-chat/releases/tag/v6.5.0-beta.3
Server and Linux desktop builds were already reproducible, and Android APKs are now as secure.
Anyone can check it themselves - no coding needed, just follow our simple guide to verify the app is genuine or run the build yourself: https://simplex.chat/reproduce/
https://blossom.primal.net/0c708ffe81366604ff103133b791f56a312e2ed42b41a5d5411f8188da00036d.jpg

2025-12-24 22:55:22 UTC

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MLS uses ratcheting trees, it's different from Double Ratchet.

2025-11-18 17:28:48 UTC

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We honestly see it as a very rare view, proportionally. We are using planning to use one of smartchains for their intended purpose - distributed computing with reliable network-wide consensus. While Community Vouchers is the primary driver to use a smartchain, it'll also solve other problems:
- namespaces for users and groups, that protect from MITM attacks - if operators host names, as in federated designs, it's impossible to protect from them.
- public server registry with operator trust and reliability metrics, without any central authority as with Tor, for example.
And there won't be any minting activity by the operators - they will run full non-validating nodes on blockchain, and will act as decentralized RPC layer to blockchain (which is a weak link for most chains), letting clients to have multiple independent views onto chain for important queries (such as name resolution).
This is a really big innovation, and most users don't see it - they think we're going to use what exist.

2025-11-18 17:23:35 UTC

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Several reasons:
- payment either requires using private cryptocurrencies, that most people don't use, or exposes identity to operators - vouchers make purchase and payment unlinkable
- direct payments create risks of operator default - we want to build zero-trust model
- no effective way to codify revenue-sharing agreement - again, risk of defaults, not honouring agreement, etc.
All these problems are solved with smart contracts, and we don't see any simpler solution.
The question is similar to "why SimpleX network needs private message routing?" To protect users privacy and security from their contacts. As the number of operators grow, it's important to protect users from operators.

2025-11-18 17:19:57 UTC

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> aren't useful as an investment
Correct. We do NOT plan to use vouchers as a fundraising mechanism, and they are not tradable, and even more - they expire. Otherwise it may cross the line with strict application of Howey test (any tradable utility token, especially if used by a single party as development funding, is likely to be considered a security), and we don't want these risks.
We are exploring other funding models, such as grants, private investments and community crowdfunding - it will all be announced next year once the plan crystallizes.
> I'm not sure this is the best solution.
That is correct, but what we like about it is that it fits a very widely used regulatory framework - prepaid telecom cards. So we are doing a technical innovation without regulatory risks, which is rarely possible.
We are always open to better ideas, as we don't see any simpler design that achieves all the stated objectives:
- zero trust
- revenue sharing between operators and "network"
- unlinkability of purchase and usage
- no (or limited) transferrability
- expiration
- ability to purchase via in-app and credit part payments without being a cryptocurrency exchange (as they are prepaid telecom cards).
- probably some others
> it's difficult for a lot of users to understand what it solves and why.
Agreed, but we aim to make it completely hidden from the users and make it possible to use Community Vouchers (aka Community Credits) without touching / knowing about blockchain.
So there won't be requirement to use a crypto wallet at some point of product development - at least that is the objective we are working to:
- user can buy Community Voucher via in-app payment (yes, with some draconian commission, but it's worth it anyway as it would increase donations to communities - about 50% of app users even today never used cryptocurrencies, and for all potential users it's even bigger share)
- user can then donate it to their community of choice
All that within the app, without any technical way to link voucher purchase to community donation, thus preserving participation privacy.

2025-11-18 17:03:08 UTC

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Yes, we see it as an issue, as message delivery will be redundant, and it's a source of revenue to the operator - so operator "default" is not an issue for message delivery.
In case operator is also a mint, then operator "default" becomes an issue, so we are not considering the model when operators act as mints – it's a much higher level of trust than message delivery.

2025-11-18 17:01:01 UTC

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Exactly right. Our goal is to build a trustless system here, and eventually make network governance trustless as well.
If you looked at the preliminary design doc you can see that e-cash emerges at a point of Community Credit to operator credit conversion (so only micropayments or "change" depend on e-cash), but we might be able to remove this extra-layer based on the current design process evolution.

2025-11-16 15:55:46 UTC

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https://primal.net/e/nevent1qqsgrphj8s6y7zl9jvgdxrvwzzkj97jw8t8n9p4u3ru76nsx95cynygju63tp

2025-11-16 15:55:09 UTC

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Community Vouchers are pure utility tokens:
- can only be used to pay for servers
- cannot be traded
- cannot be sold
- have fixed price
- expire in 6-12 month.
This is not something you can "trade" or "invest" in.

2025-11-16 15:53:12 UTC

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No, and not going to.

2025-11-16 10:43:17 UTC

Our users asked many questions about Chat Control, as discussions were restarted in the EU this week.
SimpleX Chat is an open-source app where users control the code and the servers they use.
Therefore it is impossible to implement any client-side scanning, and it will not happen.
If the law is passed, two options are possible:
- we might need to stop offering preset servers to the EU users.
- we will not need to change anything - this is the most likely outcome.
Our operations are always consistent with our Privacy Policy (https://simplex.chat/privacy), and we would rather shut down than do anything that contradicts this agreement with our users.

2025-11-12 15:50:00 UTC

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"Community Vouchers are not tradable, and there will be no "pre-mine" or public sale."

2025-11-12 15:49:18 UTC

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https://simplex.chat/vouchers/

2025-11-12 13:50:25 UTC

"Code alone doesn't cut it. Not code alone, not code widely distributed, not even code widely used. Some measure of toleration in society for activities conducted in private is necessary for long term success. Not convenient, not easier, but necessary."
Eric Hughes, "Kid Gloves or Megaphones" (email to Cypherpunk mailing list), 1996
https://diswww.mit.edu/MENELAUS.MIT.EDU/cpunks/52130

2025-11-03 19:32:07 UTC

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I can send you SimpleX address for DM?

2025-11-03 19:31:19 UTC

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More than happy to chat Calle - it's a priviledge. But we're not doing shitcoins.

2025-11-03 09:33:57 UTC

Huge thank you to all for feedback and suggestions on Community Vouchers plan!
FAQ:
1. Can we still use our servers?
Yes, and it will be improved (read full FAQ). Community Vouchers are completely opt-in, and intended only for server payments by the large groups.
2. How is it possible to provide privacy on public blockchain?
In the same way as we provide private communications on the public Internet - by using per-purchase addresses, not per user as in wallet apps, and by using zero-knowledge proofs to verify ownership.
3. How many Community vouchers will be pre-sold and available during public sale?
None! No Community Vouchers will be made available to any insiders or to the public sale – it would have made them investment contracts. Community Vouchers are restricted utility tokens.
4. What problems do vouchers solve?
- unlinkability of purchase to usage, thanks to zero-knowledge proofs.
- trust to server operators - funds will be only unlocked to them after infrastracture is provided.
- revenue sharing with network - it will be codified in blockchain contract.
5. Are you considering other blockchains?
Yes, as long as they are sufficiently mature, and natively support smart contracts and zero-knowledge proofs. Send your suggestions!
Read more details in the updated Community Voucher FAQ at http://simplex.chat/token
https://blossom.primal.net/ba7a2a7507d554ca6c71846f3cc264eff80bd32e73cf568256ce0d4289c7d120.png

2025-10-30 16:24:50 UTC

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Problems = functions. They are important features of the network for many users.

2025-10-30 13:04:01 UTC

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Start from reading the page and FAQ there, it clarifies many things.

2025-10-30 13:03:05 UTC

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Always happy to chat. Ethereum support for smart contracts and native support for zero-knowledge proofs being rolled out this year makes it the best choice to develop solutions that require network-wide consensus - there is no alternative. It's not a cryptocurrency choice as some people think.
This choice is purely technical, and not political or ideological - it's simply tech that at the moment works better than alternatives and is the most stable.
I commented some points on X, will repost here.

2025-10-30 12:42:53 UTC

We plan to adopt zkEVM networks for problems that require network-wide consensus:
- public names
- server registry
- server infrastructure payments using Community Vouchers represented by SMPX utility tokens on some L2 network TBC
Please read the plan and FAQ here: https://simplex.chat/token/
You can get a free NFT on Ethereum mainnet that will provide access to testnet when launched - planned for 2026.
https://blossom.primal.net/982e7d800a3484f999229711d6d6e90bf93b1c66e0973b971a64c3abd5245cf5.png

2025-10-01 18:00:55 UTC

Join & create SimpleX groups!
The directory can now be viewed on our website: https://simplex.chat/directory
https://blossom.primal.net/314f13698d9fc7c9812ce158a99afc75383ccee617e787feb37c6ec4f1237ec3.jpg

2025-08-14 10:44:02 UTC

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But please note the comment in the post (and Nostr post), that Whitenoise smartly avoided authentication service problem.
What is the most annoying is that this problem is never mentioned in announcements of companies rolling it out and in media publications about MLS.

2025-08-13 07:57:57 UTC

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What I mean is that Nostr relays can track which IP addresses read messages from which group IDs, creating an association with transport level identities of the users. While it's indeed mitigated to some extent by Tor/VPN, which was SimpleX design defence early on, the valid criticism of this argument that either Tor should be built into the clients (which wasn't and won't be the case with SimpleX, and is not the case with Nostr clients), as most users won't use Tor, and will assume that declared security properties hold without any additional measures.
What's worse is that even with Tor or VPN, Nostr relays can associate the list of group IDs with client sessions that read them, and observing sessions over time they would be able to statistically "recognise" users by the list of groups they get messages from. To mitigate this risk clients have to use different connections (and Tor circuits) when reading from different groups, and it's neither practical nor part of the spec. SimpleX clients offered this feature (transport isolation) as opt in.
So the response of SimpleX network design that addressed this criticism was using two independent relays in the message routing path, where the first one can see client session and transport address, but cannot see destination message queue address. And the second relay can see destination queue address, but has no information that could identify the transport session of the client. And the clients are programmed to choose relays operated by different parties to mitigate collusion risks.
What I was saying about our future chat relays design is that they are the usual messaging clients under the hood, just high volume, and won't have any network connection to the group members, even an indirect one, as they will be communicating via the existing messaging network.

2025-08-13 07:34:15 UTC

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As for participation privacy, users don't seem to accept the lack of in-built transport level protection. As long as relays can track on the IP level who reads which groups, they would have a good enough picture of who participates where. That's why we design future chat relays that would handle group broadcasts as high-traffic messaging clients that don't have any network connections with group members (not even indirect connections).

2025-08-13 07:24:56 UTC

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That's why WhiteNoise is explicitly called out as not having this problem. You could make it explicit in your docs, as some digging was required to understand that you use existing identity system instead of separate AS.

2025-08-13 07:22:30 UTC

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Nope, we never agreed that. A bank customer is not a part of the bank. So stop twisting and shilling. You'll only lose whatever audience trust you may have remaining with this approach.

2025-08-13 07:20:35 UTC

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As for address rotation, it's currently possible manually, so they are not completely static, and this feature is used a lot, and it will be automatic next year. The challenge with automatic rotation is reduced usability - data backups do not allow restoring connections, so it requires smarter approach to make sure that the solution is usable.

2025-08-13 07:18:29 UTC

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This has the same problem that was drawing criticism with early design of SimpleX network - while there is no persistent/observable identity on the protocol level, there is a fixed transport identity - relays can see which IP addresses communicate with which IP addresses. So it would require a similar solution to what we did with SimpleX network to mitigate it.

2025-08-13 07:15:45 UTC

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WhiteNoise is mentioned in the post.

2025-08-13 07:14:38 UTC

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Yes, the post mentions WhiteNoise

2025-08-12 20:49:48 UTC

An essay explaining why we don't plan to use MLS: https://www.poberezkin.com/posts/2025-08-12-mls-the-naked-king-of-end-to-end-encryption.html
A sidenote, is that Nostr's Whitenoise avoids its main problem.
TL;DR: MLS security model is "Trust me bro".

2025-08-10 21:43:12 UTC

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s/instead/in return/

2025-08-10 21:42:46 UTC

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Do you even read the nonsense you write? We supported NewOil with a tiny amount because we liked what they do and they promoted SimpleX to their audience instead. Where plural comes from is unclear - it was literally a one-off sponsorship. And Bill gates did not fund us, Village Global did. But you know it all, you are just spreading hate, aren't you?
HydraVeil may be a good thing, happy to review, but you're not making friends with your attitude.

2025-08-03 19:10:21 UTC

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Hey. We love factual criticism, but this is misleading.
Who’s talking to whom - it’s what anybody can see in Nostr clients UI, and Nostr relays can see it as well.
SimpleX relays can’t see it since private routing via two independent relays became the default - it’s been more than a year.
And most Nostr clients don’t offer choosing servers as part of onboarding. Neither does Elements afaik 🤷‍♂️
SimpleX clients currently have 2 preconfigured operators and let users choose which to use during the onboarding. There are many 100s, maybe 1000s servers in SimpleX network - that you don’t see the list is a feature.

2025-07-04 21:59:42 UTC

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Most publicly used communication systems are way more complex, objectively.
SimpleX may be more complex than some simple open-source systems, but given the objective to compete with Signal, Telegram and WhatsApp, it is still too simple, in comparison, simply because of much less money spent.
What's your point of reference for simplicity/complexity?

2025-07-03 20:54:13 UTC

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And the old link will continue to work. This short link is simply a reference to the container with full link, group profile and the key - see the post!

2025-07-03 20:52:54 UTC

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You need to have v6.4-beta.4 version. If you created the link previously, it won't be automatically shortened - there is a button under the QR code to add a short link to it.

2025-07-03 20:49:37 UTC

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Yes! And you will also see group name before joining, and starting from 6.4.1 also group logo and welcome message.

2025-07-03 19:49:46 UTC

SimpleX Chat now has a much better way to make connections – available in v6.4 beta release!
- Short links and more secure
- See the name before connecting
- Send messages without waiting for your contact to be online
Read more in the blog post: https://simplex.chat/blog/20250703-simplex-network-protocol-extension-for-securely-connecting-people.html
v6.4-beta is available on PlayStore, TestFlight and GitHub.

2025-06-05 16:21:49 UTC

SimpleX Chat is #1 messenger recommended by Whonix!
https://www.whonix.org/wiki/Chat#Recommendation

2025-04-23 18:45:04 UTC

The comparison of 6 messengers in c't magazine (Heise.de)
They ranked SimpleX Chat as the best for privacy and security!
https://m.primal.net/Qang.png
https://www.heise.de/select/ct/2025/9/2505715264990543311

2025-03-04 09:04:15 UTC

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To address some incorrect criticism:
> Did you know @SimpleX Chat now has a blockchain/shitcoin built in (called Flux)?
Nope, that's not true. There is no built-in coin. Flux the company offers their servers to the app users. Not their coin.
> Did you know they've also started doing "content moderation"—blocking users, groups and 3rd party servers?
Also not true. We cannot block users, as there are no users, and we do not block 3rd party servers. We do remove addresses of groups that distribute CSAM from our servers, without any impact on users privacy.
> Yeah, so far it's only to stop CSAM distribution but we all know how that's a slippery slope. The good old "Think of the children" tactic. If there's a method to ban, block or censor, it will be used and ABUSED.
Not true. Freedom of speech without SOME restriction cannot exist - unlimited freedom always leads to abuses of power and tyranny. Study some history. Our freedom ends where the freedom of our neighbours starts, so some limits absolutely must exist to defend our freedom.
> SimpleX Chat ... not decentralized
Not true as well - there are 100s if not 1000s of community run servers. If you don't want to use ours or Flux's, use your own or anybody else's - it's all in a single network.
> not censorship-resistant.
This is correct, and this will change, as was explained in livestream.
Censorship-resistance and privacy are technically contradictory requirements, so they have to be balanced.
> I also found out they are getting funded by VCS such a Village Global
We were never hiding it, and who are it's LPs is irrelevant - they have no influence or control on SimpleX Chat.
Read this post: https://simplex.chat/blog/20240814-simplex-chat-vision-funding-v6-private-routing-new-user-experience.html