Partner spotlight: Growth Engine X

Eric Nowoslawski built Growth Engine X on a belief most outbound shops skip: cold outbound is a data problem before it’s a sending problem.

Growth Engine X has been an OutboundSync agency partner for a while. If you run outbound through Smartlead, Instantly, HeyReach, or Clay, they’re the kind of team that engineers the machine behind it — and they use OutboundSync to land that activity in the CRM.

Who’s behind it: Eric Nowoslawski

Eric Nowoslawski is the founder of Growth Engine X and one of the most recognizable operators in cold outbound. His foundation is old-school sales, not growth hacks: he worked through Dale Carnegie, Sandler, Jeb Blount, and Oren Klaff, then built and ran the outbound process across 32 startups at once inside a tech incubator. Doing it 32 times made the real problem obvious — the manual playbook that books meetings for one company doesn’t scale to many — and closing that gap is what Growth Engine X was built to do. (A nice full circle: Oren Klaff, whose pitch method Eric studied early on, is now a client.)

He has stayed on the front edge of how outbound actually gets built. Eric is one of Clay’s heaviest users and, by his own account, had never written a line of code until recently — he now runs hundreds of Clay tables in parallel and writes his own tooling to enrich data at a scale most agencies don’t attempt. The throughline is the one his clients buy into: outbound is an engineering problem, and the person running yours should think like one.

Why Growth Engine X treats outbound as a data problem

Most outbound comes down to a list and a sending tool, and the results usually look like it. Growth Engine X starts a layer earlier. Eric’s team merges firmographic, technographic, and persona data from more than 20 databases inside Clay to build targeted playbooks per segment — the work that made the agency, by its own reporting, Clay’s largest user by enrichment volume.

The same obsession shows up in infrastructure. Backup sending domains are always warmed and ready, so when one degrades they swap it instantly instead of losing weeks to recovery. The point isn’t volume for its own sake — it’s that clean data and resilient infrastructure are what make volume safe.

What Growth Engine X actually does

The work runs the full cycle: data collection, cold email infrastructure, then interest-based calls that turn replies into booked meetings — not just a hand-off of positive responses. Campaigns run in three tiers — broad, focused, and niche — so the messaging matches how tightly defined each segment is.

The scale is real, and it runs on the stack outbound operators recognize — Clay, Smartlead, Instantly, HeyReach, Prospeo, HubSpot, and Make. The client roster runs from fast-growing startups to names like Notion — and Clay itself.

The fit with OutboundSync

Growth Engine X already runs on the platforms OutboundSync supports, and uses OutboundSync to push that outbound activity into the CRM. They build the engine — data, sequences, infrastructure, calls — and OutboundSync makes the resulting activity visible on the right records in HubSpot so the rest of the revenue team can act on it.

If you want an outbound program engineered from the data up, Eric’s team is one to know.