This document describes the ECOSTAR project, which promotes entrepreneurship and innovation for biodiversity-based business. ECOSTAR is a hub and business accelerator that focuses on business models that make profit by marketing and enhancing biodiversity and ecosystem services. It provides an online training program, connects startups to mentors and investors through its network, and runs a 3-month accelerator program for selected startups to help them grow. The goal is to support innovative businesses that can succeed financially while protecting and improving natural capital.