I built an email API for AI agents in a weekend. Here's how it compares to the $6M-funded competitor.

This article is an opinionated product review. I wrote the tool I'm ranking #1. The conflict disclosure is loud and on purpose — skip to the bottom if you want the honest "where we lose" section. The category exists now Three weeks ago, "email infrastructure for AI agents" was a category that didn't have a name. Today it has four credible entries: AgentMail — raised $6M seed led by General Catalyst on 2026-03-10. YC Summer 2025. Paul G