In simple English
Many email programs are slow, bloated, or consume too much memory on your computer. Aerion is a fresh alternative designed to run light and fast. It supports multiple mail providers, unified inboxes, and keyboard shortcuts. You can download and use it for free under an open source licence. It costs you nothing except a little time to set up your accounts.
What it is
Aerion is an open source desktop email client built with Go and Svelte. It connects to standard email providers via IMAP and SMTP without needing heavy browser frameworks or external system accounts.
What it is good for
Solo builders and anyone tired of slow email apps who want a fast, clean client with a unified inbox and strong privacy focus.
- Consumes very little RAM and CPU compared to web-based desktop apps.
- Supports multiple accounts, unified inboxes, and conversation threads.
- Includes built-in PGP and S/MIME support for encrypted email.
- Requires manual setup and configuration for each email provider.
- Some advanced features like calendar and contacts extensions are still in alpha.
- No automatic package manager install commands provided out of the box.
Thunderbird, Mailspring, or webmail tabs
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Download the installer for your operating system from the official website at https://aerion.3df.io/docs/getting-started/installation/.