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Case Studies

How Growth Alliance Builds Scalable Outbound for $5M+ Companies Using the Forge Stack

Growth Alliance is a revenue activation consultancy that helps $5M+ companies turn fragmented marketing operations into scalable, predictable outbound revenue engines. They don’t run campaigns. They build scalable systems. As a Forge Expert partner, Growth Alliance uses the Forge Stack as a unified outbound ecosystem - both internally and across client engagements - to design revenue engines that scale across domains, inboxes, ICPs, and teams without sacrificing deliverability or control. A key part of that transformation was consolidation: moving away from multiple disconnected platforms and standardizing outbound on one integrated stack - from infrastructure to warm-up to sending. In their own words, Growth Alliance implements unified strategies on a unified system that scales.

The Challenge

Growth Alliance works with companies that are already past early traction. At this stage, outbound doesn’t fail because of messaging - it fails because the underlying system can’t scale. Common issues included:

  • Infrastructure that breaks down as volume increases
  • Tool sprawl across domain setup, mailboxes, warm-up, and sending
  • Manual handoffs between platforms creating friction and risk for in-house sales teams
  • No clean way to isolate reputation between teams or clients
  • Siloed outbound setups that require constant monitoring and fixes

“Switching between tools, platforms, and contexts are the ultimate killers in efficient growth. As I'm a firm believer in scalable processes that are unified in strategy, it’s sort of a no-brainer to have everything in one place, working consistently, and have a support team that takes rapid feedback to heart.”

Spencer Tahil
Founder & Chief Growth Officer at Growth Alliance

The Setup

Growth Alliance standardized fully on the Forge Stack, replacing several standalone tools with one integrated ecosystem that covers the entire outbound lifecycle. From domain and mailbox setup, to warm-up, to sending, everything runs inside one stack - supported end to end, even at enterprise scale.

Growth Alliance’s Outbound System

To run and validate outbound systems, Growth Alliance operates:

  • Salesforge
    • Active email sequences
    • Ongoing experimentation with multi-channel LinkedIn + email outreach
    • Participation in developing new features and Forge products as a Design Partner
  • Infraforge
    • A portfolio of 1000+ domains and mailboxes across their clients
    • Additional dedicated IPs for isolation and control
  • Warmforge
    • All mailboxes fully warmed
    • 89+ Heat Scores across inboxes

This internal setup allows Growth Alliance to test messaging, sequencing, and channel strategies inside the same system they deploy for clients, ensuring everything holds up under real conditions.

“As we have a handful of boutique clients in our portfolio at any moment relying on our expertise in the industry, there's no way that I would ever recommend a tool that I don't trust individually. It's for that reason that if we don't use them, we don't recommend them. It's just that simple. We use the Forges because it works, it works well, and the support is near instant. This is the pinnacle of white-glove and everything we stand behind service wise.”

Spencer Tahil
Founder & Chief Growth Officer at Growth Alliance

The Results

Across internal use and multiple portfolio client deployments, Growth Alliance achieved exactly what they set out to build: scalable outbound systems that hold up under real volume. Key outcomes include:

Hundreds of domains and thousands of mailboxes deployed
Smooth transitions from multiple tools to one unified stack
Stable inbox health with 89+ Heat Scores where warm-up is complete
Multiple completed outbound sequences producing replies
Clean separation between internal and client infrastructure
One standardized outbound ecosystem used across all engagements

The Takeaway

Growth Alliance shows what outbound can look like when it’s built for $5M+ companies - and when it runs on a single, unified stack. By consolidating on the Forge Stack, they’ve created a repeatable way to:

  • Transition complex outbound setups without friction
  • Deploy scalable systems across clients
  • Protect deliverability while increasing volume

This isn’t campaign-based outbound. It’s a revenue engine.

“Scaling comes from doing the boring things consistently better than everyone else. Moving from siloed tools to a unified system in the same way we treat our own clients is what really moved the needle.”

Spencer Tahil
Founder & Chief Growth Officer at Growth Alliance

Build Scalable Outbound Like Growth Alliance

If you’re a $5M+ company - or an agency building outbound for clients - the Forge Stack gives you everything you need in one place. Start building your outbound engine today.
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Every Aspect of Successful Outreach, Covered ✅

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