
AI email client that drafts replies, prioritizes messages, and manages scheduling for busy professionals.
Stamp AI, Inc. is a San Francisco-based company founded in 2024 by Archit Mehta and Akshat Mehta. The company participated in the Y Combinator Winter 2025 batch and operates as a privately held business.
The company builds Stamp, an AI-native email and calendar assistant that drafts replies, prioritizes messages, extracts action items, and schedules meetings for individual professionals and teams.
Stamp is an AI-powered email and calendar assistant designed to act as a personal secretary. The product drafts replies in the user's voice, prioritizes and categorizes incoming emails, extracts action items, and schedules calendar events. It learns preferences over time through long-term memories, plain-English AI labels, and context search.
The product is available as a web application and mobile app with voice mode. It integrates with existing email accounts and offers a free Hobby tier plus paid Personal and Business subscription plans.
The AI email assistant market in 2026 includes products that summarize threads, draft replies, and automate narrow workflows. Stamp's positioning assumes that reducing decision load and completing work is more valuable than incremental composition speed.
Competitors range from native email clients with AI layers, such as Superhuman and Spark, to ecosystem assistants like Gemini in Gmail and Copilot in Outlook, plus automation platforms like Zapier and self-hosted options like OpenClaw.
Stamp differentiates itself by focusing on delegated inbox handling rather than drafting alone. The product continuously observes, organizes, drafts, and prepares actions before the user starts reviewing email, reducing decision overhead and the volume of messages that require manual triage.
Persistent memory about users, contacts, and workflows improves prioritization and reply quality over time, while plain-English AI labels let users express inbox logic without building rigid rules.
Stamp's delegation-first model requires users to trust the product with continuous inbox access and automated actions. The value of the assistant depends on the quality of its memory, labels, and context search, which improve over time but may produce errors early in usage.
The product also competes with free or bundled AI features in Gmail, Outlook, and Apple Mail, which may be sufficient for users who only need summarization and drafting rather than full inbox delegation.
Stamp monetizes through direct, self-serve subscription tiers. The Hobby plan is free with limited AI features, the Personal plan is $20 per month, and the Business plan is $50 per month, with annual billing offering a 20% discount.
The pricing structure targets individual professionals, startups, and mid-sized teams that want increased usage limits, more connected email accounts, and profile enrichments.