A fast desktop mail, calendar and contacts client

Kestrel

Outlook-style mail, calendar and people for Windows, macOS and Linux, built for very large mailboxes. Never loses a draft, keeps background work out of your way, and updates itself.

Download

Version 0.1.2

Install once; after that Kestrel checks for updates itself, downloads them in the background and asks before restarting. Every update is signed and verified by the app before it installs (how this works).

Windows

Installer (per user)Kestrel-0.1.2-windows-x64-setup.exe · SHA-256
MSI packageKestrel-0.1.2-windows-x64.msi · SHA-256

macOS

Apple siliconKestrel-0.1.2-macos-arm64.dmg · SHA-256
Universal (Intel + Apple silicon)Kestrel-0.1.2-macos-universal.dmg · SHA-256

Linux

AppImage (updates itself)Kestrel-0.1.2-linux-x86_64.AppImage · SHA-256
Debian / Ubuntu (.deb)Kestrel-0.1.2-linux-x86_64.deb · SHA-256
Fedora / RHEL (.rpm)Kestrel-0.1.2-linux-x86_64.rpm · SHA-256

First launch of an unsigned build. macOS: right-click the app and choose Open the first time. Windows: if SmartScreen warns, choose More info then Run anyway. Linux packages (.deb/.rpm) show when an update is available; the AppImage updates itself.