EmailShepherd

EmailShepherd is an agentic email production platform built by the team behind Taxi for Email — the people who pioneered the Email Design System approach that modern email teams now take for granted. It is the same core idea, rebuilt from scratch for how email gets made today: a design system defines the approved components, colors, and layouts, and everything produced inside it stays on brand by default, whether a person or an AI agent is doing the building.

For teams already working the Taxi way, EmailShepherd is the natural next step. The mental model is familiar — design system as guardrails, developers own the framework, marketers work inside it — so there is no need to rethink how your email program is structured or retrain everyone on a different way of working. What changes is what sits on top: modern tooling, a faster editor, and the people who invented the approach still building it.

The newer layer is native AI. Building agents produce complete, production-ready emails within your design system's guardrails, and review agents catch typos, placeholder URLs, missing disclaimers, and compliance problems before anything ships. An MCP server and full API expose the same capabilities to your existing tools, so AI assistants can build and manage emails programmatically rather than through a UI.

Around that, marketers get an intuitive no-code visual builder while developers keep complete HTML control and a proper developer platform. Comments, collaboration, and approval workflows keep stakeholders aligned from first draft to sign-off, and finished emails publish as clean, optimized code straight into the ESPs teams already use.