The Letter Company Releases Letterpress-1: A Coding Agent Built for Growth Engineering

The Letter Company has released the beta of Letterpress-1, a coding agent, harness and IDE for growth engineering that reads a website and its market, builds changes in a sandbox and opens a pull request with a live preview. It runs on Letter's hosted platform against your git repository, exposes 760 tools through one registry over MCP, REST and CLI, and starts at $100/month with agent runs costing model spend plus 20%. No public benchmark is available, and Letter's performance claims are self-reported.