GTM infrastructure sequencing at Series B
The infrastructure that works at 20 reps breaks at 50. How to sequence the GTM build: data layer, scoring, enrichment, and activation as the team scales.
Series B is when GTM motions that worked at 10 reps start breaking at 40. The playbook built on tribal knowledge and founder relationships hits a wall. Most companies reach for more headcount. Infrastructure is what works.
The sequencing matters. Building in the wrong order wastes money and creates technical debt in the GTM stack.
Why does the CRM data foundation come first?
The CRM needs to be accurate, enriched, and structured before anything else gets built. That means operationalising the ICP definition as a scoring model that runs against every record in the system, plus enrichment waterfalls across tech stack, job titles, company size, and funding stage. Nothing downstream works without this layer.
An ICP definition that lives in a slide deck doesn’t count as operationalised.
Why does inbound infrastructure come before outbound?
At Series B, inbound volume is usually high enough that routing accuracy becomes the biggest single lever on conversion, so the inbound build comes before outbound. Enrichment-at-signup, tier-based routing, rep assignment logic, and first-message generation. A Tier 1 account landing at the right rep with context in two minutes beats a generic sequence three days later.
Across 300 trials a month, that gap compounds.
What does a signal-driven outbound layer look like?
Once inbound is clean, outbound runs on signals: job changes, intent spikes, funding rounds, tech stack changes, competitor migrations. Each signal needs a play. n8n or a comparable orchestration layer routes each signal to the right sequence, with enrichment running at trigger time.
When should you build ABM infrastructure?
Build ABM infrastructure last. It requires a defined target account list, account-level intent data, and a sales team large enough to run coordinated plays; ABM on a weak data layer is expensive noise. Only start once the data, inbound, and outbound layers underneath it hold up.
Companies that skip ahead (launching ABM before inbound infrastructure is right, building outbound sequences before the ICP model is solid) end up doing everything at 60% effectiveness. The sequencing is unglamorous. It works.