Brian Balfour Essays to help you build a growth machine. Subscribe Sent Weekly MarketingGrowthPersonal Detailed essays on growth and user acquisition by Brian Balfour, Founder/CEO of Reforge, previously VP Growth @ HubSpot, to help you build a growth machine. Discussion What do you think of this newsletter? Post Discover Interesting Newsletters Every Week 🎉 Every week we share the best new newsletters as well as tips to start writing your own.