AgentMail is an API-first email infrastructure platform built specifically for AI agents, enabling them to programmatically create, send, receive, and search emails via REST API with support for two-way conversations, real-time webhooks, and unlimited inbox provisioning at scale. Backed by General Catalyst and Y Combinator, it rebuilds email infrastructure from scratch to handle the high-volume, autonomous inbox creation and messaging demands of agentic workflows that legacy providers like Gmail cannot support.
“There's a startup called AgentMail — it's an email service built specifically for agents to send emails.”
Source→“I went to Claude and I asked what we should use for if we wanted to build this outbound AI campaigns. And it said to use a YC company called Agent Mail that's pre-warmed and set up... It did work in about one minute. And the emails, it says they're warmed. I got the emails instantly to the top of my email.”