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GTM engineering agency for seed to Series C teams

OneGTM is a founder-led GTM engineering agency. Garrett Wolfe, an early Unify employee (#9) who helped grow Unify's ARR from $400K to $6M+, builds custom outbound, signal, CRM, and AI systems for seed to Series C teams. The work uses Clay, Claude Code, and Attio. OneGTM is a Clay Artisan Solutions Partner and an OutboundSync Agency Partner.

By Garrett Wolfe, founder of OneGTM. Updated .

Key takeaways

  • Founder-led by Garrett Wolfe, Unify employee #9, who helped grow Unify's ARR from $400K to $6M+.
  • Clay Artisan Solutions Partner and OutboundSync Agency Partner.
  • Custom outbound, signal, CRM, and AI systems for seed to Series C teams, built with Clay, Claude Code, and Attio.
  • Antimetal: $2.57M in pipeline from 17 automated outbound deals.
  • Coastal Recruiting: 4.7x more accepted intros.
  • Green Dock Partners: a daily digest of industrial site closures, with no deal outcome claimed.

What is a GTM engineering agency?

A GTM engineering agency builds the outbound, signal, CRM, and AI systems a revenue team runs. OneGTM does that work founder-led, for seed to Series C teams, with Clay, Claude Code, and Attio.

Garrett Wolfe leads it. He was employee #9 at Unify and helped grow Unify's ARR from $400K to $6M+. OneGTM is a Clay Artisan Solutions Partner and an OutboundSync Agency Partner.

What OneGTM builds

Outbound systems

Custom outbound for seed to Series C teams, built with Clay and Claude Code and tied to the CRM in Attio.

Signal systems

Signal systems that feed outbound, built with Clay and Claude Code alongside the CRM.

CRM systems

CRM systems in Attio for the team that runs the outbound, the signals, and the AI.

AI systems

AI systems built with Claude Code, used inside the outbound, signal, and CRM work.

Sibling pages go deeper on one slice: the Clay agency page, the outbound agency page, and the RevOps agency page. The full list of systems is on what OneGTM builds.

Published results

OneGTM's published case studies are three. Antimetal: $2.57M in pipeline from 17 automated outbound deals. Coastal Recruiting: 4.7x more accepted intros. Green Dock Partners: a daily digest of industrial site closures, with no deal outcome claimed.

Antimetal

$2.57M in pipeline from 17 automated outbound deals. The writeup is the Antimetal case study.

Coastal Recruiting

4.7x more accepted intros. The writeup is the Coastal Recruiting case study.

Green Dock Partners

A daily digest of industrial site closures, with no deal outcome claimed. The writeup is the Green Dock Partners case study.

Who this is for

Seed to Series C teams that want custom outbound, signal, CRM, and AI systems. The stack OneGTM builds with is Clay, Claude Code, and Attio.

If you are comparing a packaged AI SDR with a system your team runs, the AI SDR alternatives page is the short version, with the same published case studies.

GTM engineering agency FAQ

What is a GTM engineering agency?
A GTM engineering agency builds the outbound, signal, CRM, and AI systems a revenue team runs. OneGTM is a founder-led GTM engineering agency for seed to Series C teams. Garrett Wolfe, an early Unify employee (#9) who helped grow Unify's ARR from $400K to $6M+, leads the work. OneGTM is a Clay Artisan Solutions Partner and an OutboundSync Agency Partner, and builds with Clay, Claude Code, and Attio.
Who runs OneGTM?
Garrett Wolfe, founder of OneGTM. He was an early employee at Unify (#9) and helped grow Unify's ARR from $400K to $6M+. OneGTM is a Clay Artisan Solutions Partner and an OutboundSync Agency Partner.
What does OneGTM build?
Custom outbound, signal, CRM, and AI systems for seed to Series C teams, using Clay, Claude Code, and Attio.
What results has OneGTM published?
Antimetal: $2.57M in pipeline from 17 automated outbound deals. Coastal Recruiting: 4.7x more accepted intros. Green Dock Partners: a daily digest of industrial site closures, with no deal outcome claimed. All three writeups are on this site.
Is OneGTM a Clay partner?
Yes. OneGTM is a Clay Artisan Solutions Partner and an OutboundSync Agency Partner.

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