Growth Engine X

Verified

Cold-email and outbound lead-gen agency sending 8M+ emails/month — trusted by Clay, Notion and Instantly.ai.

Headquarters: Unknown
Employees: 11–50
Serves: North America

About

Growth Engine X is the outbound agency of Eric Nowoslawski, one of the most respected operators in cold email. It builds and runs B2B lead generation campaigns at scale — 8M+ emails per month, 62K+ positive responses in 2025 — for companies with $1M+ in revenue, with free test campaigns for qualifying businesses. Clients include Clay, Notion and Instantly.ai.

Services

Outbound Email + LinkedIn
Sales/SDRs

Works with

B2B Software

Notable clients

Baton Market
Clay
Donut
Instantly.ai
Notion
Numeral

Client relationships are compiled from public sources, including the agency's own site, and are not independently verified.