Growth Engine X

Growth Engine X is a cold email agency founded by Eric Nowoslawski, a well-known voice in the Clay and cold email community. It runs data-driven outbound for B2B companies with more than $1 million in revenue, and it says it sends over 8 million cold emails a month for its clients on enterprise-grade infrastructure.

The agency builds repeatable data collection strategies, often using Clay to find and qualify leads and to personalize messages based on signals, then runs large-scale cold email campaigns and follows positive replies through to booked meetings. It is a Clay Solutions Partner and works closely with leading sending tools, and it has served hundreds of customers. Because it manages its own sending infrastructure, clients do not need to set up domains and inboxes themselves.

It suits B2B companies with a customer lifetime value of several thousand dollars or more that want high-volume, well-targeted cold email run by specialists.

Pricing is not published. Growth Engine X offers a free test campaign so that prospective clients can see results before committing.