How Vanderbuild Saves 4+ Hours Per Client and Hits 99.3% Deliverability

Vanderbuild is a GTM engineering agency run by Founder and CEO Mateusz Sekta. It builds outbound and CRM data systems for SaaS companies, software houses, VCs and agencies across DACH, the UK and the US.

Before switching to the Forge Stack, Vanderbuild ran client outbound across three different vendors. Infrastructure setup relied on custom automations. MCP connectors kept disconnecting, LinkedIn accounts needed reconnecting whenever a client changed SDRs, and new operators had to learn where to find everything across tools.

The goal was simple. Spend less time on setup, whether onboarding a new client or a new team member.

Why Vanderbuild Chose The Forge

Vanderbuild wanted infrastructure, sequences and reply handling working together in one tool that still connects to the rest of its stack through API and MCP.

On the Forge Stack, client infrastructure lives in one place, multichannel outbound is priced on usage instead of seats, and real people on the Forge team answer support tickets.

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The Results

Vanderbuild moved its client campaigns onto Primeforge, Warmforge and Salesforge. Here's what changed after the switch:

The Takeaway

With the Forge Stack, Vanderbuild runs its proven outbound playbook on a single stack, onboards clients faster and keeps deliverability steady.

Here's what Mateusz had to say about managing outbound on the Forge Stack: “The Forge MCP lets us run outbound from Claude without switching tools. Campaign management got faster.”