Ekolab was established in 2002 under the name Ellehauge & Kildemoes. In 2012 the company changed its name to Ekolab.
At its inception, the company's background was mainly in the development and dissemination of sustainable energy technologies at home and abroad, but has gradually expanded its competencies to include general work on sustainability and indoor climate, etc. Furthermore, a large part of the activities now consists of traditional design tasks, which benefit from the great professional insight and experience of the company's staff (see employees), as well as the professional cutting-edge experience gained through the development projects.