Growth Engine X

Review

★7.9/10

🇺🇸 New York, New York, United States·10 - 49 employees·Est. 2021·Reviewed Sep 2026

High-volume B2B cold email outbound for companies ready to scale pipeline

Visit Website

Best For

B2B companies with large TAMs and enough ACV to turn cold email replies into revenue

Hourly Rate

$50-99/hr

In line with the $75/hr median for lead gen agencies in United States

Min. Project

$5,000+

Industries

SaaS, B2B Services, Technology

About Growth Engine X

Growth Engine X operates Cold Outbound, a B2B lead generation practice focused on high-volume cold email. The official site highlights free test launches, inbox infrastructure, list building, and ongoing optimization for companies sending at meaningful outbound scale.

Who Growth Engine X Is Best For

Growth Engine X is best for teams that already have a sales motion and want high-volume cold email outbound. The official Cold Outbound site emphasizes free test campaigns, millions of monthly sends, and partnering only when outbound results are clear.

Why Choose Growth Engine X

Official site centers B2B cold email lead generation rather than general marketing

Offers a free test campaign before longer commitments

Publishes large monthly send volume and client response examples

Strong Clay and cold-email tooling footprint in public founder materials

Things to Consider

Optimized for large TAMs; small niche markets are called out as a weaker fit

Needs an internal sales team to convert replies into revenue

High-volume email model is not a phone-first appointment desk

Public street HQ detail is limited beyond US operations

Growth Engine X Services

B2B Lead GenerationCold EmailOutbound CampaignsList BuildingDeliverability

Alternatives to Growth Engine X

Lead Gen Agencies with a similar market, price band, and focus.

Direct B2B

★ 7.6

Business Services, Software, Professional Services, outbound sales teams

Direct B2B is a B2B lead generation firm based in H1W 2Y8, Canada, founded in 2005, offering b2b lead generation, appointment setting, cold calling. The team focuses on outbound prospecting, meeting booking, and pipeline support for growth-stage buyers.

View Profile

Calling Agency

★ 8.6

B2B SaaS, manufacturing, logistics, multichannel appointment setting

Calling Agency is a New Castle, Delaware B2B lead generation company founded in 2016. The team runs multichannel outbound programs across cold calling, email, LinkedIn, and paid ads for more than 250 active clients. DesignRush cites a 70%+ meeting-to-opportunity conversion rate, 95% client retention, and thousands of monthly appointments booked across SaaS, manufacturing, logistics, and professional services verticals.

View Profile

Lunas Consulting

★ 7.9

Startup B2B outbound, Toronto delivery, sales outsourcing

Lunas Consulting is a Toronto, Canada B2B sales outsourcing and outbound lead generation agency founded in 2021 with under 49 employees. The team helps early-stage startups worldwide with sustainable revenue growth, appointment setting, and outbound prospecting. DesignRush lists a 4.3 rating and a verified case citing 15% monthly lead increases and 10% overall revenue growth.

View Profile