Lightweight by design
Use only 20–140 MB of RAM instead of the 800 MB or more common in similar email clients.
Performance without compromise
Email that is fast, light, and secure from the ground up.
A native, fully Rust codebase gives Flectar Mail the speed, efficiency, and control web-based clients cannot match.
Native on every platform
Open source for desktop and mobile, with an instant native experience powered by a fully Rust codebase.
Secure without webviews
No embedded webviews. Flectar Mail uses its own Rust HTML and CSS renderer, reducing the application’s attack surface by design.
Client comparison
Lightweight should not mean limited.
Compare the technology behind the clients—not just their inboxes.
| Email client | Typical RAM use | Application architecture | UI runtime / WebView | Platforms |
|---|---|---|---|---|
| Flectar Mail | 20–140 MB | Rust app + custom renderer | No WebView | Windows, macOS, Linux, iOS, Android |
| Gmail in one Chrome tab | ≈300 MB | Browser-based web app | Chrome / Chromium | Web |
| Thunderbird | ≈850 MB | Gecko-based desktop app | Gecko rendering engine | Windows, macOS, Linux, Android |
| Outlook for Windows | ≈800 MB | Windows shell + WebView UI | Microsoft Edge WebView2 | Windows |
| Aerion | ≈450 MB | Go shell + WebView UI | Wails · system WebView | Windows, macOS, Linux |
| Spark | ≈650 MB | Electron shell + web UI | Electron / Chromium | macOS, Windows, iOS, Android |
RAM figures are indicative observations, not a controlled benchmark. Usage varies with the operating system, mailbox size, extensions, active accounts, and activity.
Downloads
Choose your platform.
Flectar Mail is ready for Windows and Linux, with more platforms on the way.
Windows
Download the native Windows installer.
EXE installer
Get Flectar MailLinux
Choose the package format that fits your distribution.
DEBRPMAURAppImage
Get Flectar MailmacOS
A native macOS release is in development.
Android
The Android release is coming soon.
iOS
The iPhone and iPad release is coming soon.
Customization
Make your inbox feel like yours.
Keep the detailed three-pane layout or switch to a streamlined minimal view. Choose light or dark mode, select a built-in color palette or create a custom one, and show or hide sender avatars.
Full workspace or minimal focus
Keep folders, messages, and the selected email visible together, or reduce visual noise and give each part of your inbox more room.
Light or dark, your way
Match your workspace to the time of day and the way you prefer to read, with either theme available across both layouts.
Color palettes that fit
Start with a built-in teal, green, or purple palette, then create a custom color palette of your own.
Choose your color palette
Built-in palettes are available in light and dark mode, alongside a custom palette for a workspace that is distinctly yours.
