San Francisco-based startup AgentMail has raised $6 million in seed funding to develop an email infrastructure designed specifically for autonomous AI agents. The round was led by General Catalyst with participation from Y Combinator, Phosphor Capital, and prominent angel investors including Paul Graham, Dharmesh Shah, Paul Copplestone, and Karim Atiyeh.

AgentMail is building an API-first platform that allows AI agents to create and manage their own email inboxes—enabling them to send, receive, and process emails autonomously without human intervention. The system supports features such as threading, labeling, search, structured data parsing, and real-time communication through API calls.

Founded by Haakam Aujla, Michael Kim, and Adi Singh, the startup aims to provide AI agents with a digital identity layer using email, which remains a core communication infrastructure across online services.

The funding will support the expansion of AgentMail’s platform as demand grows for infrastructure enabling AI agents to operate autonomously across business workflows and internet services.