Open-source Superhuman alternative
Inbox Zero Mail is an open-source email client for Gmail and Outlook. Fast, keyboard-first, and free to use, on web, Mac, Windows and iPhone, with all your accounts in one inbox. Add AI for $20/mo: every email is sorted, and replies are drafted in your voice before you open them. Comment privately with your team, get Slack alerts, and give the AI context from your tools.
Inbox Zero launched on Product Hunt on 2026-10-18 and has 337 upvotes and 29 comments so far.
This tool is open source.