Flectar Mail

Flectar Mail is a lightweight, native home for your email, calendars, and contacts. It is engineered to open instantly, stay responsive, and use a fraction of the memory of a typical web-based mail client.

Why Flectar Mail?

• Fast from the first click. A native interface and local-first data path get you to your inbox without waiting on a browser runtime.
• As little as 20 MB of RAM. Flectar Mail is deliberately designed to keep memory use low, even with a full-featured inbox at your fingertips.
• Everything in one place. Move between mail, calendars, and contacts without stitching together separate apps.
• Offline by design. Your mailbox and calendar are stored locally, so your synced data remains useful without a connection.
• Works with your accounts. Connect Gmail, Outlook and Microsoft 365, or standards-based IMAP/SMTP, JMAP, and CalDAV services.
• Privacy-conscious defaults. Remote images are blocked until you allow them, helping prevent tracking pixels from reporting when you read a message.
• Security by architecture. Email content is never opened in a WebView. Flectar Mail renders HTML and CSS through its own Rust-native pipeline, does not execute email scripts, and blocks remote images by default. This avoids the embedded-browser attack surface by design.
• An experimental Rust renderer. Building an email renderer without a browser engine is new territory. Rendering issues are expected, especially in complex messages, while compatibility continues to improve.
• Made for every screen. Spacious and minimal desktop layouts share the same experience as the touch-friendly compact interface.
• Native and open source. Built from the ground up with Rust. It is not a browser wrapped in a window, and it is released under the AGPLv3.