A transition towards a circular economy holds great promise for achieving a sustainable economic development. Yet, although the Netherlands has been one of Europe’s frontrunners when it comes to the recycling of materials, with 80% of all the waste generated being recycled, downcyclingrather than upcycling remains the rule, resulting in recycled material of lower value than the original. Moreover, far less attention has been paid to prevention, reuse and repair. The white paper outlines the roles played by new entrepreneurial ventures in the circular economy (called circular start-ups) to accelerate the transition towards a circular economy.