The revenue model answers a narrow question: where does the money come from. It names revenue streams such as one-time sales, subscriptions, licensing, transaction fees, or advertising, and pairs each with a pricing logic. A single business can run several streams at once.
It sits inside the wider business model but is distinct from it. The business model describes the whole system of value creation and capture; the revenue model describes only the capture side. Getting it right shapes margins, growth, and how a company weathers demand swings.