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All proof of work
Cost and capacity · B2B SaaS

A twelve-person marketing team, rebuilt around AI

Twelve people across LinkedIn, email, blog, SEO, and outreach became 2.5 FTE, at roughly $33 a month in model spend.

FTE carrying the same surface area
12 → 2.5
Total model spend
~$33/mo
Outbound reviewed by a human
100%

The situation

An in-house B2B marketing team was carrying twelve people across LinkedIn, email, blog, SEO, and sales outreach. The work was real, but most of it was high-frequency and low-judgment: exactly the shape that gets expensive when humans do it and gets sloppy when a large model does it carelessly.

What we did

We built a coordinated AI system that sized each task to the smallest model that could do it: a fast, cheap model for high-frequency work, a stronger model reserved for judgment calls. Both sat behind a deterministic harness that handled sequencing and formatting, so the models only did the part that actually needed a model.

Custom MCP connectors wired the system into the real stack, meaning Apollo, HubSpot, and a custom Outlook connector, instead of a parallel universe of exports. Sales staff review every outbound message before it leaves.

The result

The team went from twelve to 2.5 FTE at roughly $33 a month in model spend. The cost story is striking, but the transferable lesson is the architecture: most of what a marketing team does does not need a frontier model, and a deterministic harness around cheap models beats an expensive model doing everything.

Capabilities
  • Cost-effective LLM workflow design
  • Deterministic AI harness
  • Workflow orchestration
  • MCP connectors
  • Multi-system API integration (Apollo, HubSpot, Outlook)
  • Human-in-the-loop review gates
More proof
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