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The Four Fits: A Growth Framework for the AI Era

Brian Balfour · 25 Sept 2025

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  1. Everyone knows about Product Market Fit. And while it is one of the Four Fits, it’s only one of them.
  2. Product Channel Fit recognizes that products must be built for the channels where customers discover them (channels do not mold to products).
  3. AI increases both the problem space and the solution space.

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