#10
Superhuman
$30/mo. Waitlist. Sub-100ms. Mandatory onboarding call. NPS 58 (iPhone: 47).
Superhuman is a keyboard-first email client: every action is bound to a shortcut, and its AI drafts, summarises and triages messages. It is unusual in two ways — it required a one-to-one onboarding call before you could start using it, and it charges a subscription well above the free webmail most of its users are arriving from. Grammarly acquired the company in 2025.
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