GTM Engineering Agency

Sales as a
system

closed:in is a GTM engineering agency. We engineer the full go-to-market system: enriched data, multi-channel outbound, CRM automation and pipeline analytics. The output is a repeatable revenue engine, built on infrastructure rather than headcount.

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50+

Systems built

1,000+

Campaigns

20+

Meetings/mo avg

98%

Deliverability

What is GTM engineering

From manual sales
to engineered revenue.

A GTM engineering agency treats go-to-market as a system to be designed. Instead of buying more SDRs, you build the data, outbound, CRM and analytics infrastructure that makes outbound predictable. Once running, the system produces meetings consistently across reps.

Data layer

Clay-based enrichment, signal scoring, ICP fit detection. Your prospect data becomes a competitive advantage.

Outbound layer

Email infrastructure, multi-step sequences, LinkedIn outreach, copy that respects the buyer's time.

CRM layer

Reply handling, pipeline automation, meeting booking flows. Replies turn into qualified opportunities automatically.

Analytics layer

Weekly reporting on reply rates, opportunity counts, pipeline value and conversion. Decisions backed by data.

How we work

Three phases.
Two to three weeks to launch.

Diagnose

Week 1. We map your current GTM stack, ICP definition, sales cycle and pipeline goals. Output: a written system design.

Build

Weeks 2-3. We set up infrastructure, build Clay tables, write copy, configure CRM and warm up sending capacity.

Run

Week 4 onwards. Live campaigns. Weekly reporting. Iteration on copy, lists and sequences. First meetings booked.

Proof

Systems that produce.

Endresz · Creative agency · Multi-market

247 boutique conversations across Europe

Multi-market GTM system across NL, France, Poland and London with localized messaging that produced USD 128K+ pipeline in 6 weeks.

Verzendbazen · NL/BE · E-commerce fulfillment

78 opportunities with a 13.9% reply rate

Complete outbound engine built with Clay and Instantly to generate qualified e-commerce leads and create EUR 78K in pipeline.

Frequently asked

Questions, answered.

What is GTM engineering?

GTM engineering means treating your go-to-market function as an engineered system rather than a manual sales process. A GTM engineering agency designs and builds the data layer (enrichment, signals), the outbound layer (email, LinkedIn, sequences), the CRM layer (pipeline automation, reply handling), and the analytics layer (reporting, attribution). The goal is a repeatable revenue engine.

How is a GTM engineering agency different from a traditional sales agency?

A traditional sales or cold email agency sends emails on your behalf. A GTM engineering agency builds the underlying system: enriched lead data, signal scoring, multi-channel sequences, CRM automation and analytics. You end up with an asset you own.

Who hires a GTM engineering agency?

B2B SaaS founders, recruitment and PE firms, agencies and product companies selling into mid-market and enterprise. Typically EUR 5K+ ACV businesses that need predictable outbound but do not want to hire an in-house revenue operations team.

Which tools do GTM engineering agencies typically use?

closed:in's core stack: Clay for enrichment and orchestration, Instantly for cold email, Close CRM for pipeline management, Apollo and Sales Navigator for sourcing, LinkedIn for direct outreach, and n8n for custom automation. We are a Clay Solutions Partner, Instantly Certified Expert and Apollo Partner.

How long does a GTM engineering engagement take?

Initial system build runs 3 to 6 weeks depending on scope. Most clients are live with running campaigns and integrated CRM within 2-3 weeks. Ongoing optimization continues over the 3-month minimum engagement, after which clients either renew or take the system in-house.

Do you train my team or do everything for us?

Both options exist. Full done-for-you means we run campaigns end-to-end and report weekly. Done-with-you means we build the system, train your team, and hand over with documentation. Choice depends on whether you want to keep delivery in-house long-term.

Sales as asystem

From manual salesto engineered revenue.