AgentMail

AgentMail gives AI agents their own real email inboxes so they can send, receive, thread, search, and act on messages the way a person would, but entirely through a REST API instead of a human-facing inbox. A single API call provisions an inbox with no OAuth flow and no manual setup, which matters for cases where an agent needs to get a working email address on its own, without a person in the loop. The service supports custom domains configured with DKIM, SPF, and DMARC for deliverability, plus IMAP and SMTP access, real-time webhooks and WebSocket events, and an MCP server so agent frameworks can plug in directly. It ships Python and TypeScript SDKs and a multi-tenant "Pods" feature aimed at platforms that need to issue many inboxes to many end users or agents at once. AgentMail says thousands of developers already use it to power hundreds of thousands of agents in areas like procurement, logistics, and finance. The company came out of Y Combinator's Summer 2025 batch and raised a $6 million seed round led by General Catalyst, with participation from Y Combinator and angel investors including Paul Graham and Dharmesh Shah. The main open question from the public site is detailed pricing: plans and enterprise tiers are referenced but not broken out in full.