XMTP

XMTP AND THE FUTURE OF PRIVACY IN A QUANTUM WORLD As of today, XMTP is now a fully quantum-resistant decentralized messaging protocol. This means, any developer, anywhere in the world can leverage XMTP to provide their users with private, decentraliz...

To read more about XMTP and the future of privacy in a quantum world:
paragraph.com/@xmtp_commun...

Any developer, anywhere in the world can get started building with the world's most private, secure, open messaging network.

👁️ Privacy through Transparency

As with everything in XMTP, this change will be released in the open. XMTP client code, servers, and data are available to the public. You can read a more detailed security analysis of the feature here.

github.com/xmtp/libxmtp...

XMTP was built on the belief that private communication must not depend on trust in any single party, including us.

We believe this architecture aligns with the highest privacy standards demanded by the most privacy-conscious organizations and individuals.

🥷 How XMTP defends against "Harvest Now, Decrypt Later"

Our partners at Cryspen have been working on a post-quantum OpenMLS, & have implemented hybrid ciphersuites that can be dropped in to replace all cryptography with post-quantum algorithms.

This now means no one can HNDL.

Quantum computing isn’t just sci-fi; it will break the cryptography we rely on for messaging.

While applications like Signal can protect at the application level, there has been no quantum-level secure open messaging protocol for developers.

XMTP is this solution for the world.

As of today, XMTP is now a fully quantum-resistant decentralized messaging protocol.

This means, any developer, anywhere in the world can leverage XMTP to provide their users with private, decentralized, & quantum-resistant messaging.

ATproto devs, app builders, dreamers of a more agentic world—this our opportunity to shape secure, private open E2EE messaging!

This preliminary AT Messaging spec needs your help to finish. Dive in, share your brilliance, join #e2eeWG, and let’s build it together!

github.com/ATProtocol-C...

To build a new communication network that requires global trust, you have to open source everything. True security comes from transparency.

This is why XMTP's node software is open source—anyone can inspect, & verify every line of code. No more blind trust in a black box.

One inbox. Many identities.

XMTP lets users link multiple identities + passkey or crypto wallet to a single secure inbox.

This means any DiD, can link to XMTP and access secure, private messaging with XMTP.

Ephemera We help grow the XMTP ecosystem. We do XMTP infrastructure R&D. We develop Converse, the secure and encrypted crypto-native messenger.

Messaging should be open, secure, and user-owned. Come & build with us to continue to make decentralized messaging a reality.

Read our full release here on @paragraph_xyz:
paragraph.xyz/@xmtp_commu...

Come join the core team building XMTP:
ephemerahq.com/careers

7/7

We're officially adding Passkeys 🔑 in May so that XMTP works on:
✅ Any network (inc Sol, BTC, Nostr, Bluesky)
✅ Any identity
✅ Anywhere in the world

No phone number required—just secure, global, decentralized messaging with XMTP. 💬 🔒 🌍

6/7

XMTP combines optimum security with a comprehensive set of features so that devs can build consumer messaging apps:

✅ Secure group chats & DMs
✅ Reactions and replies
✅ Block/Allow lists
✅ Multimedia attachments
✅ Push notifications
✅ Disappearing messages

5/7

XMTP is more than a protocol, it's a network of apps & identities.

Meaning, the 2.2M identities on XMTP-- across @base, @ensdomains, @LC, @unstoppableweb & FIDs-- can use any app, such as @CoinbaseWallet, @family, or @converseapp_ (+ 60 other apps)

This is true ownership.

4/7

XMTP is the first decentralized implementation of the MLS (Messaging Layer Security), built entirely on the IETF's open standards.

🔒 E2EE encryption
👁️ Forward secrecy & post-compromise security
⚡ Efficient scale for large groups
📱 Support for multi-device messaging

3/7

XMTP ensures that no government, company, or individual has control.

Our core pillars are:
✅ Secure, audited encryption
✅ Full-stack transparency
✅ Global decentralization

Decentralized messaging means we own & control our messages, the way we own and control our money.

2/7

Privacy is under attack.

🇬🇧 The UK made Apple drop ADP.
🇮🇳 India forced a backdoor to WhatsApp.
🇷🇺 Russia & 🇹🇷 Turkey banned Discord.

Centralized systems are breaking down & encryption is not enough.
We need decentralized messaging.

1/7

A Vision for End-to-End Encrypted Messaging on ATproto | chrisb A Vision for End-to-End Encrypted Messaging on ATproto End-to-end encrypted (E2EE) messaging built on ATproto could become the open, decentralized alternative to WhatsApp—free from lock-in, surveilla...

The #ATmosphereConf last weekend was 🔥🔥🔥

One amazing breakout was on E2EE Messaging—a topic I’m passionate about bringing to life on ATproto. To align the community, I wrote a vision paper on E2EE Messaging for ATproto. Check it out and let’s push this forward together!👇

whtwnd.com/boscolo.co/3...

Ephemera We help grow the XMTP ecosystem. We do XMTP infrastructure R&D. We develop Converse, the secure and encrypted crypto-native messenger.

Messaging should be open, secure, and user-owned. Come & build with us to continue to make decentralized messaging a reality.

Read our full release here on @paragraph_xyz:
paragraph.xyz/@xmtp_commu...

Come join the core team building XMTP:
ephemerahq.com/careers

7/7

We're officially adding Passkeys 🔑 in May so that XMTP works on:
✅ Any network (inc Sol, BTC, Nostr, Bluesky)
✅ Any identity
✅ Anywhere in the world

No phone number required—just secure, global, decentralized messaging with XMTP. 💬 🔒 🌍

6/7

XMTP combines optimum security with a comprehensive set of features so that devs can build consumer messaging apps:

✅ Secure group chats & DMs
✅ Reactions and replies
✅ Block/Allow lists
✅ Multimedia attachments
✅ Push notifications
✅ Disappearing messages

5/7

XMTP is more than a protocol, it's a network of apps & identities.

Meaning, the 2.2M identities on XMTP-- across @base, @ensdomains, @LC, @unstoppableweb & FIDs-- can use any app, such as @CoinbaseWallet, @family, or @converseapp_ (+ 60 other apps)

This is true ownership.

4/7

XMTP is the first decentralized implementation of the MLS (Messaging Layer Security), built entirely on the IETF's open standards.

🔒 E2EE encryption
👁️ Forward secrecy & post-compromise security
⚡ Efficient scale for large groups
📱 Support for multi-device messaging

3/7

XMTP ensures that no government, company, or individual has control.

Our core pillars are:
✅ Secure, audited encryption
✅ Full-stack transparency
✅ Global decentralization

Decentralized messaging means we own & control our messages, the way we own and control our money.

2/7

Privacy is under attack.

🇬🇧 The UK made Apple drop ADP.
🇮🇳 India forced a backdoor to WhatsApp.
🇷🇺 Russia & 🇹🇷 Turkey banned Discord.

Centralized systems are breaking down & encryption is not enough.
We need decentralized messaging.

1/7

✅ Any network
✅ Any identity
✅ Anywhere in the world

No more phone numbers needed.

💬 🔒 🌍 Secure, global, decentralized messaging with XMTP.
x.com/ShaneMac/st...

Wow, this is unreal.

This is such a huge moment for the future of encryption.

it's honestly shocking, especially for UK.

100%. Hard to imagine a society operating even remotely free without credible encryption.

To build a new communication network that requires global trust, you have to open source everything. True security comes from transparency.

This is why XMTP's node software is open source—anyone can inspect, & verify every line of code. No more blind trust in a black box.