Estuary
Where conversations converge.
A native, webview-free messenger for macOS, built on the same engine as Delta Chat. End-to-end encrypted, decentralized, no phone number required — your account is just an e-mail address on a chatmail relay.
macOS 15+, Apple silicon. Rebuilt on every commit; ad-hoc signed, so first launch is right-click → Open.
Why Estuary?
Actually native
SwiftUI front to back — no Electron, no embedded browser. Fast, light, and at home on your Mac: notifications, dock badge, Quick Look, menu-bar shortcuts.
Delta Chat compatible
The official deltachat-core engine runs in-process. Chat with anyone on Delta Chat, and add Estuary as a second device to your existing profile by scanning a QR code.
Private by default
Instant encrypted profile on a chatmail relay — no sign-up form, no phone number, no visible address. End-to-end encryption is on from the first message.
Open & decentralized
Built on open e-mail infrastructure: no lock-in, thousands of servers to choose from, or run your own. Your data stays yours.
Full-featured
Media, voice-message playback, reactions, replies, groups, search, archive, muting, multi-profile — synced with your other devices.
Public domain
Estuary's code is released under the Unlicense. Fork it, ship it, no strings attached (the bundled core is MPL-2.0).
Build from source
git clone https://github.com/lambadalambda/estuary
cd estuary
make run-appNeeds Rust, Xcode command-line tools, and cmake. Details in the
README.