Hiring a GTM engineer vs fractional vs build and handover

There are four usual ways to get a GTM system built: hire a GTM engineer, bring in a fractional one, pay a retainer agency to run it for you, or have it built and handed over. They differ in how you pay, who owns the system and who runs it after.

Updated November 2026

Groundswell GTM
In-house GTM engineer
Fractional GTM engineer
Retainer agency
Cost model

One build, paid in stages, at a fixed price.

A salary, and months of ramp.

Part of someone’s time, paid by the day or month.

Activity, every month.

Time to live

Starter Builds take weeks. A full build takes five months, or three on Express.

Hiring time first, then the build.

Depends on how much of their time you get.

Usually quick to start.

Who owns the system

You do. It runs in your own accounts and in your name.

You do, but knowledge leaves when the person does.

You do, if it’s built in your own accounts.

Nothing you own.

What you need internally

A point person for 1 to 2 hours a week (5 or more on Express), and someone who can sign things off.

Someone to hire and manage them.

Someone to set their priorities each week.

Someone to review the results.

Best for

B2B companies with sales already coming in, a large market to go after, and someone ready to champion the build.

Teams with enough GTM work for a full-time role.

Teams that need expert help a few days a month.

First-time outbound, early-stage startups, or teams that want everything run for them.

Groundswell GTM

Cost model

One build, paid in stages, at a fixed price.

Time to live

Starter Builds take weeks. A full build takes five months, or three on Express.

Who owns the system

You do. It runs in your own accounts and in your name.

What you need internally

A point person for 1 to 2 hours a week (5 or more on Express), and someone who can sign things off.

Best for

B2B companies with sales already coming in, a large market to go after, and someone ready to champion the build.

In-house GTM engineer

Cost model

A salary, and months of ramp.

Time to live

Hiring time first, then the build.

Who owns the system

You do, but knowledge leaves when the person does.

What you need internally

Someone to hire and manage them.

Best for

Teams with enough GTM work for a full-time role.

Fractional GTM engineer

Cost model

Part of someone’s time, paid by the day or month.

Time to live

Depends on how much of their time you get.

Who owns the system

You do, if it’s built in your own accounts.

What you need internally

Someone to set their priorities each week.

Best for

Teams that need expert help a few days a month.

Retainer agency

Cost model

Activity, every month.

Time to live

Usually quick to start.

Who owns the system

Nothing you own.

What you need internally

Someone to review the results.

Best for

First-time outbound, early-stage startups, or teams that want everything run for them.

Groundswell GTM
In-house GTM engineer
Fractional GTM engineer
Retainer agency
Cost model

One build, paid in stages, at a fixed price.

A salary, and months of ramp.

Part of someone’s time, paid by the day or month.

Activity, every month.

Time to live

Starter Builds take weeks. A full build takes five months, or three on Express.

Hiring time first, then the build.

Depends on how much of their time you get.

Usually quick to start.

Who owns the system

You do. It runs in your own accounts and in your name.

You do, but knowledge leaves when the person does.

You do, if it’s built in your own accounts.

Nothing you own.

What you need internally

A point person for 1 to 2 hours a week (5 or more on Express), and someone who can sign things off.

Someone to hire and manage them.

Someone to set their priorities each week.

Someone to review the results.

Best for

B2B companies with sales already coming in, a large market to go after, and someone ready to champion the build.

Teams with enough GTM work for a full-time role.

Teams that need expert help a few days a month.

First-time outbound, early-stage startups, or teams that want everything run for them.

Groundswell GTM

Cost model

One build, paid in stages, at a fixed price.

Time to live

Starter Builds take weeks. A full build takes five months, or three on Express.

Who owns the system

You do. It runs in your own accounts and in your name.

What you need internally

A point person for 1 to 2 hours a week (5 or more on Express), and someone who can sign things off.

Best for

B2B companies with sales already coming in, a large market to go after, and someone ready to champion the build.

In-house GTM engineer

Cost model

A salary, and months of ramp.

Time to live

Hiring time first, then the build.

Who owns the system

You do, but knowledge leaves when the person does.

What you need internally

Someone to hire and manage them.

Best for

Teams with enough GTM work for a full-time role.

Fractional GTM engineer

Cost model

Part of someone’s time, paid by the day or month.

Time to live

Depends on how much of their time you get.

Who owns the system

You do, if it’s built in your own accounts.

What you need internally

Someone to set their priorities each week.

Best for

Teams that need expert help a few days a month.

Retainer agency

Cost model

Activity, every month.

Time to live

Usually quick to start.

Who owns the system

Nothing you own.

What you need internally

Someone to review the results.

Best for

First-time outbound, early-stage startups, or teams that want everything run for them.

Which one fits

Hiring a GTM engineer

Best when you have enough GTM work to keep someone busy full-time. You don’t need one to get started: if you hire a GTM engineer later, they start from a documented system rather than a blank page.

A fractional GTM engineer

Best when you need expert help for part of the week, and someone on your side can direct the work.

A retainer agency

Best if you’re running outbound for the first time, you’re an early-stage startup, or you’d like an agency to run everything for you on retainer.

Build and handover

Best for B2B companies with sales already coming in. You have at least two people in sales and one in marketing, a large market to go after, and someone ready to champion the build.

Build a GTM system that’s yours to run.

Book your free consultation

Build a GTM system that’s yours to run.

Book your free consultation

Build a GTM system that’s yours to run.

Book your free consultation