Brian Balfour is the Founder and CEO at Reforge. He’s also a Venture Partner at Long Journey Ventures. Formerly, Brian was VP of Growth at HubSpot, EIR at Trinity Ventures, Founder at Viximo, and Product Manager at ZoomInfo.
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EC: What’s the biggest misconception product leaders still have about growth today?
BB: The biggest misconception is that AI has changed everything. It hasn't. The same fundamental principles are still true. There are just different ways to apply them.
Some examples:
Retention is still the king of growth. Those with the highest retention will win categories.
To have retention, you need to build a habit. The journey to build a habit is through a ‘setup’ moment, ‘aha’ moment, ‘habit’ moment. The onboarding experiences we are able to build change, but the fundamentals are the same.
To grow you need to build a compounding growth system out of growth loops (not funnels). AI has just changed the common bottlenecks of growth loops. For example, in UGC loops the bottleneck used to be on content creation. AI reduces that friction, but shifts the bottleneck elsewhere.
When you create your monetization model, it still needs to pass three checks:
Customer View — Your customers see that Perceived Value > Perceived Price + Friction
Growth Loops — Monetization models enable/disable certain growth mechanisms. They work together.
Costs — Your monetization model needs to cover cost to serve + cost to acquire.
In AI, Costs have become much more important, which is driving people towards different monetization models.
Point is, if you know the fundamentals well, then you'll have an easier time navigating and winning in all of these change.







