Brian Balfour

Brian Balfour is Miro’s chief growth officer and the founder of Reforge, the product-development and professional-education company acquired by Miro in 2026. His frameworks for growth, distribution, and AI product strategy address a central question for software companies: how to build a durable advantage when competitors can increasingly access the same technologies.

From startups to Reforge

Balfour grew up in Michigan and attended the University of Michigan. He co-founded Viximo, subsequently acquired by Tapjoy, and Boundless Learning, subsequently acquired by Valore, and was an entrepreneur-in-residence at Trinity Ventures. At Boundless, he served as chief marketing officer.

From 2014 to 2016, he was HubSpot’s vice president of growth, building a team around new products including HubSpot Sales and HubSpot CRM. Launching a CRM into an already crowded market sharpened his focus on finding overlooked customer needs within established categories.

He founded Reforge in 2016 and created its original Growth Series with Andrew Chen. Collaborators including Casey Winters, Shaun Clowes, Kevin Kwok, and Elena Verna helped expand the company into an expert-led learning community and product-development software business.

Ideas that shaped his work

• The Four Fits framework: Balfour’s growth framework links market-product fit, product-channel fit, channel-model fit, and model-market fit. Product design, distribution, business economics, and market characteristics function as an interdependent system; changing one can destabilize the others.

• Compounding growth loops: With Winters, Kwok, and Chen, Balfour developed an alternative to linear acquisition funnels: growth loops that reinvest the output of one cycle into the next. The model connects product activity, customer acquisition, retention, and distribution instead of treating them as isolated departmental targets.

• AI-native product teams: His work on AI-native development describes teams moving directly from ideas to prototypes, exploring more solutions, shortening feedback cycles, and reducing coordination overhead. Faster execution increases the value of deciding which problems deserve attention.

• Differentiation through proprietary context: Balfour argues that broadly available foundation models create little competitive advantage independently. His AI product-strategy framework combines distinctive customer data, specialized functionality, integrations, and unmet needs. He points to Granola’s combination of user-written notes, meeting transcripts, calendar context, and desktop integration as an example of features reinforcing one another around a specific customer problem.

At Reforge, Balfour applied those ideas through Reforge Insights, an AI product-research tool, and Compass, designed to automate routine project-management work. When Reforge joined Miro in March 2026, its learning platform and AI product-development tools joined Miro’s collaborative workspace, while Reforge Learning continued as a distinct, vendor-neutral offering.