Most people didn’t notice last month when a 35-person company in San Francisco called HoneyBook announced a $22 million Series B*.

What was unusual about the deal is that nearly all the best-known Silicon Valley VCs competed for it. That’s because HoneyBook is a prime example of an important new category of digital company that combines the best elements of networks like Facebook with marketplaces like Airbnb — what we call a market network.