Superhuman

Superhuman is the fastest email client optimized for sales and professional workflows. October 2025 update introduced Auto Drafts (AI automatically writes follow-ups in your voice) and Auto Labels (every email auto-classified into categories: response needed, waiting on, meetings, marketing, cold pitches). AI can send emails on your behalf without manual review - functioning like executive assistant. Ask AI feature allows natural language inbox search. Custom Labels using conversational prompts instead of complex rules. Acquired by Grammarly in July 2025 for $825M, continues operating independently with Rahul Vohra as CEO. Most expensive premium email client at $30/user/mo. Available on Mac, Windows, iOS, Android.