Open source alternatives to Superhuman

One project on starwire does the same job. Ranked by how much of what Superhuman does each one covers, read from its README and website. Ties go to the most active.

What Superhuman does

Fast email clientcore
Keyboard-driven inbox triagecore
Split inbox
Snooze and reminders
Scheduled send
AI writing and summaries
Read receipts

Each dot in the table is one job, in this order. Square dots are core jobs and count double. Full means yes, half means partly. "See the evidence" under a project shows the line behind each one. Coverage is what a project documents, not how well it works or how hard it is to move to. How we score this

Project	Covers	Stars	Commits, 12 weeks	Last release	Closed vs opened	Setup	License
inbox-zeroOpen source AI email assistant for triaging and clearing an inbox	Covers one part44%	13k+85	1,162	2 days ago	54%	Hosted version	Custom license
Covers 1 of 2 core jobs. Not shown: Keyboard-driven inbox triage; Snooze and reminders; Scheduled send; Read receipts.See the evidence Fast email clientcoreYesA fast email client for Gmail and Outlook Keyboard-driven inbox triagecoreNot shownNeither the README nor the website mentions it. Split inboxYeswith a split inbox, all your accounts in one place Snooze and remindersNot shownNeither the README nor the website mentions it. Scheduled sendNot shownNeither the README nor the website mentions it. AI writing and summariesYespre-drafts replies in your tone and style Read receiptsNot shownNeither the README nor the website mentions it.

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