If we do not know who the customer is, we do not know what quality is.
A startup is a human institution designed to deliver a new product or service under conditions of extreme uncertainty.
The lean startup method is not about cost, it is about speed.
Sustainable growth is characterized by one simple rule: New customers come from the actions of past customers.
Learning is the essential unit of progress for startups.
The only person who can put you out of business, in the early days, is yourself.