Outbound Agency Index Find your agency

Growth Engine X

Growth Engine X is an outbound agency based in New York, United States. It runs cold email, GTM engineering, deliverability and list building and serves buyers in the US.

HQ New York, US· Founded n/a· Team n/a· Updated 16 October 2026· Visit coldoutbound.com

Clay NativeVerified Deliverability

Facts

Read from public sources. Last checked 16 October 2026.

Services
Cold email, GTM engineering, deliverability, list building
Stack
Clay, Smartlead, Instantly
Segments
Not stated. Source describes its buyers as: b2b over $1M revenue.
Regions served
US
Pricing model
Retainer
Published minimum
Not published. Ask for a quote.
Source note
High-volume cold email; free test campaign; 3-month minimum

Badges

Earned from the record at each build. A badge whose condition stops holding disappears, image included.

  • Clay Native Lists Clay in its stack.
    Clay Native: Growth Engine X on Outbound Agency Index
  • Verified Deliverability Offers deliverability as a service.
    Verified Deliverability: Growth Engine X on Outbound Agency Index

Third-party proof

Ratings are cited with the platform link and the date we read them. Review text stays on the platform.

No Clutch or G2 rating is on file yet. A rating counts only with a URL and the date we read it.

How it ranks

37Rank 57 of 103. The leader scores 95; this agency holds 36 of 100 raw points.

  • Third-party proof 0 / 40 No Clutch or G2 rating on file
  • Pricing transparency 6 / 20 Retainer pricing
  • Service depth 20 / 20 Leads with cold email
  • Stack transparency 10 / 10 Names 3 tools
  • Editor's pick 0 / 10 Not an editor's pick

How we rank

Listed on

Every ranking page this agency appears on, with its position there.

Written by Outbound Agency Index from public sources. If something here has changed, update it at the source and send the links to hello@outboundagencyindex.com.