Fast, open-source email app for Gmail and Outlook with optional AI
The Inbox Zero email client is a keyboard-driven email app for Gmail and Outlook accounts, available on the web, desktop and iPhone. It is free to use and open source, with one-key shortcuts, a Cmd-K command bar and a split inbox. Optional AI sorts each email into tabs such as To Reply and Newsletter and drafts replies in your voice. It launched on Product Hunt on October 18, 2026 as an open-source Superhuman alternative.
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