Ecofys B.V. (Ecofys) is a provider of energy saving and renewable energy solutions. It operates as a subsidiary of Econcern BV. The company focuses on providing energy savings, sustainable transport, corporate carbon energy solutions, and climate policies. It offers research, consultancy, and project development services in the fields of solar energy, wind energy, bio energy, hydrogen, and fuel cell technology. Since its inception, the company conducted extensive research and completed various projects for several energy companies, housing corporations, building companies, international and local authorities. Ecofys is headquartered in Utrecht, the Netherlands.

Recently, the company launched BEAM² analysis tool, which will provide an overview of energy demand and CO2 emissions as well as investment and operating costs for space heating and cooling, hot water and electricity for buildings across Europe.