Stamp is an AI-native email client and "AI Secretary" that automates email and calendar management by drafting replies in your voice, prioritizing and categorizing messages, generating summaries and to-dos, and executing agent tasks like bulk drafting, web research, and scheduling; its AI uses long-term memories and context from past emails to personalize responses and surface high-priority items. Users—especially busy professionals—choose Stamp to cut manual triage, accelerate replies with a single-key approval workflow (Stamp Mode), reduce missed follow-ups, and offload repetitive inbox work so their email effectively acts like a 24/7 second brain.