Superhuman is a premium email client built for speed and focus. Its AI features include Instant Reply (one-click AI-drafted responses), thread summarization that condenses long email chains to the key points, and AI triage that surfaces only the emails that actually need your attention. The keyboard-first interface with split-second load times makes it the fastest email client available - an advantage that becomes apparent after years of slower tools. The Focused Inbox learns who matters to you. Read Status shows when recipients have opened your emails. At $25-30/mo, it targets professionals for whom email is a significant time sink. The productivity gain has to clear a real cost bar, but for high-volume inbox users, the math often works.