Cold Email Referencing a Mutual Customer's Success

## Overview Write a cold email that uses a company the prospect already has a relationship with — a shared vendor, integration partner, or known peer — as a social proof bridge. ## Use Cases - SaaS integration platforms mentioning that their prospect's key partner is a customer - Enterprise vendors using platform ecosystem relationships to open new accounts - Service providers reaching companies who share customers with existing clients ## Why This Prompt Works This prompt is engineered for professional outreach that converts. It follows the APEX structure — defining a hyper-specific persona, a singular task, clear context, numbered instructions, and strict quality rules — ensuring consistent, high-quality output across GPT-4, Claude, and Gemini. ## Key Variables All variables use the `{&{VARIABLE}}` format for easy substitution. Replace each variable with your specific context before using.