Many people have been asking me about how we designed the XMTP Identity system to be fundamentally different from others in the space. With our latest update, we completely changed how XMTP ID works, making it solely a passkey to provide global interoperability. Let's breakdown how XMTP is the most open, unopinionated, and interoperable standard for everyone... Messaging Isn’t an App. It’s a Protocol. Think of XMTP like SMTP was for email. Except this time: It’s encrypted It’s decentralized It’s unowned It’s yours This isn’t another messaging app. XMTP is the foundation every app can build on. One Identity. Any Network. At the heart of XMTP ID is a passkey. That means you can bind any owned identity — ENS, Farcaster, Solana, Lens, Nostr, Mastodon, Bluesky, or even a traditional email address — to your XMTP ID. Once linked, you can message any other bound identity across any network. Want to message someone’s ENS from your Farcaster handle? Want your email to reach someone’s .sol address — privately, securely? Now you can. One key. All networks. What Makes XMTP Different 🟦 XMTP ID is not a global ID. You don’t need to register a new name. XMTP lets your existing identity speak. 🟦 It’s unopinionated by design. XMTP doesn’t force a naming system. It works with what you already own. 🟦 It’s private by default. End-to-end encrypted. No central servers. Quantum-resistant encryption for the future. 🟦 It’s a protocol, not a platform. No lock-in. No rent-seeking middlemen. Just a simple primitive any developer can integrate. Why This Matters Identity on the internet is finally composable. With XMTP ID, you can: Reach any owned identity across networks Create secure, private communication between communities 🟦 Build apps where the inbox is portable and user-owned 🟦 Protect attention through programmable messaging and paywalls have completely changed how XMTP ID works, making it Enable true interoperability across the decentralized internet This Is the New Layer of the Internet We believe private communication is a human right. We believe the messaging layer of the internet should not be owned by any company. We believe one open protocol — simple, flexible, and secure — can connect the world. That’s what we’re building. One key to reach them all. One protocol to rebuild private communication for the world. Join us. We are @xmtp_