Superhuman

Superhuman started as a fast, keyboard-driven email client and is now an AI productivity suite combining Superhuman Mail, Grammarly, Superhuman Docs (formerly Coda) and Go, an assistant that works across apps. The mail client remains the design reference: command-driven, with a shortcut for nearly every action and onboarding that coaches people into using them. It is a key study for anyone designing keyboard-first productivity software or bringing AI into an existing workflow.