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White Noise - Secure Private Messenger
A truly secure and private messenger that's lightning fast, massively scalable, and identity-free.

Signal Messenger: Speak Freely
Say "hello" to a different messaging experience. An unexpected focus on privacy, combined with all of the features you expect.

Wave - Secure Messaging App
Privacy-first messaging with quantum-level encryption. No signup, fully decentralized, zero tracking.
Quiet FAQ
A private, p2p alternative to Slack and Discord built on Tor & IPFS - TryQuiet/quiet
Beeper — All your chats in one app
Get the most popular messaging services, all in a single app. WhatsApp, Signal, Instagram, Telegram, and more.

Peersky Browser (@peersky@mastodon.social)
Attached: 1 image 💬#PeerSky v1.0.0-beta.23 is here! Introducing #PeerChat, a chat that lives on your machine, not a server! - Create rooms for friends or teams with a name, bio, link, and avatar - Direct Messages: start private chats instantly with automatic key sharing - Real-time chat with live updates, emoji reactions, and unlimited file attachments Try it out! 👉 https://peersky.p2plabs.xyz/ Source: https://github.com/p2plabsxyz/peerchat
Whisper — E2E Encrypted P2P Messages
Sign in with your Bluesky account. Messages travel directly between browsers — no server can read them.
Webxdc: mini apps shared in a chat
Secure mini apps for chats. No internet access, no tracking, no servers.

NOX: One Inbox for All Your Messages
iMessage, WhatsApp, Slack, email: one AI-powered inbox on macOS. Draft replies in your voice. Never miss a message.

How to Use Signal Encrypted Messaging
The best end-to-end encrypted messaging app has a host of security features. Here are the ones you should care about.

better-email | sTeam Public
What i find interesting about this article is not the realization that MPI is like email, but the reverse, that human collaboration using messages is like MPI. The suggestion to use SMTP as a transport for things much more complex than emails is something worth looking at. It relates to my belief that the instant messaging difference does not come from the new protocols like XMPP for jabber, but from the new client interface that facilitates short messages in a conversational style. SMTP is equally (if not more) capable of transporting these messages. Sure, SMTP is not designed for "instant" messaging. but todays use of SMTP where my local SMTP server talks directly to your SMTP server, makes email is just as instant.
XMPP - The universal messaging standard
XMPP is the Extensible Messaging and Presence Protocol, a set of open technologies for instant messaging, presence, multi-party chat, voice and video calls, collaboration, lightweight middleware, content syndication, and generalized routing of XML data.

proto instant messenger
AIM-inspired group chat on the AT Protocol. Real-time chat rooms, presence, away messages — a safe space for community.

Underrated "feature" of AIM / IRC: you could only send people messages if they were online! Sort of built-in backpressure. If you're busy, you won't sign on much, so you won't end up with a "big unread count". Feels so quaint now, like a little village. Say hi to your friends during passeggiata…