The Catbird for Bluesky client app now has experimental end to end encrypted group chats. Built using AT Protocol primitives, all you need is to log into Catbird with your Bluesky account. Chat with friends, share images and posts, find your community again. Now available for testing:
Join the Catbird for Bluesky beta
testflight.apple.comMar 20, 2026 at 7:54 PM
Unlocking Quantum-Encrypted Group Chats for ATProto on XMTP
Developers building with ATProto (the protocol powering Bluesky) have been asking how they can use XMTP to power messaging between users in their apps. It’s possible today to add secure messaging to any Bluesky app, and to add Bluesky identity to any messenger built on XMTP. 0:00 /0:
Weblog.social | AT Protocol Bridge
To connect securely, you must generate a dedicated Application Password via Bluesky.
CryptPad: end-to-end encrypted collaboration suite
CryptPad: end-to-end encrypted collaboration suite
CryptPad: end-to-end encrypted collaboration suite
CryptPad: end-to-end encrypted collaboration suite
Whisper — E2E Encrypted P2P Messages
Sign in with your Bluesky account. Messages travel directly between browsers — no server can read them.
ATSMS — end-to-end encrypted group messaging
Encrypted group messaging on AT Protocol identities, with no server ordering anything.
Beyond Bluesky: These are the apps building social experiences on the AT Protocol | TechCrunch
A list of AT Protocol-based, consumer-facing apps that are either built on top of Bluesky or its underlying protocol, allowing users to take back control over their social networking experiences and personal data.
Request For Comments: A secure contact import scheme for social networks | Bluesky
This article outlines plans for a future Bluesky feature \- it doesn’t exist yet\! By sharing our ideas early, we hope to solicit feedback from the community.
freeq — IRC with identity
IRC server with AT Protocol (Bluesky) identity authentication. Connect with any IRC client, authenticate with your Bluesky account.
Bluesky Protocol Services
High scale open social, unlocked for every builder. Bluesky operates public infrastructure for the AT Protocol — Jetstream, Relay, and the Bluesky API — as open services anyone can build on.
Build a Voice & Video Agent — IRC with identity
IRC server with AT Protocol (Bluesky) identity authentication. Connect with any IRC client, authenticate with your Bluesky account.
Discord DAVE Protocol Whitepaper
Whitepaper for Discord's Audio & Video End-to-End Encryption (DAVE) protocol
This Website is Hosted on Bluesky
Well, not this one. But this one is! How? Let’s take a closer look at Bluesky and the AT Protocol that underpins it. Note: I communicated with the Bluesky team prior to the publishing of this post. While the functionality described is not the intended use of the application, it is known behavior and does not constitue a vulnerability disclosure process. My main motivation for reaching out to them was because I like the folks and don’t want to make their lives harder.
