One of the most instructive things I have built was a B2C division created from nothing inside a company that had only ever sold B2B. It grew from zero to a multi-million-dollar business, and almost none of the hard part was the product.
The Company Is the First Obstacle
A B2B organization has muscle memory: long sales cycles, account managers, relationship-driven deals. Drop a consumer product into that body and the existing reflexes fight it. The pricing logic is wrong. The fulfillment assumptions are wrong. The metrics everyone watches are wrong.
Launching B2C inside a B2B company is, before anything else, the act of building a parallel system that can run on different physics without the parent rejecting it.
Zero to One Is a Systems Problem
From nothing, you are building the whole machine at once: positioning, acquisition channels, the funnel, the measurement, the fulfillment path. The temptation is to launch fast and figure out the system later. That is how you end up with a product that has revenue and no engine underneath it.
I did it the other way. Kill criteria first. Channels piloted from zero. A measurement layer in place before scale, so that when the thing worked, we knew exactly why and could pour fuel on the specific parts that earned it.
A New Revenue Line Where None Existed
The result was not a side project. It was a new revenue line where none had existed, with a system mature enough to keep producing after I moved on. That last part matters. A launch that depends on its founder is a liability. A launch that runs itself is an asset.
New products are easy to start and hard to sustain. The difference is whether you built a system or just a splash.