RiiMail · Open source desktop email

A calmer inbox, with intelligence that stays local.

RiiMail is a focused desktop email client with spam and phishing checks that run on your device. Your mailbox is synchronized over IMAP, cached locally, and presented without a cloud AI dependency.

Download

Choose your software.

Available

macOS — Apple Silicon

M1, M2, M3, M4 and later · macOS 14+

Download DMG ↓

Coming soon

macOS — Intel

64-bit Intel Macs · macOS 14+

Not yet available

Planned

Linux

Desktop package · Distribution support to be announced

Coming later

Planned

Windows

64-bit PCs · Version support to be announced

Coming later

Version 0.2.1 Apple Silicon · 683 MiB Published 6 November 2026 Release notes ↗

What stays local

Private by design.

01
Email is cached on your device in local SQLite storage.
02
The bundled model rates suspicious messages on-device.
03
Mailbox credentials are protected by your operating system's secure credential store.
04
Telemetry export is disabled unless you explicitly opt in.

Installation

From download to inbox.

01
Download the installer for your platform.
02
Open it and follow your platform’s installation prompts.
03
Launch RiiMail and connect your IMAP account.

The current macOS release is ad-hoc signed for testing and is not notarized. macOS may show a Gatekeeper warning when you open a downloaded build.