Elisa Oyj engages in the provision of telecommunications, information and communications technology, and online services. It operates through the Consumer Customers, and Corporate Customers segments. The Consumer Customers segment provides consumers and households with telecommunications services, such as voice and data services. The Corporate Customers segment offers to the corporate and community customers voices and data services, information and communication solutions, and contact center services. The company was founded by Daniel Johannes Wadén in 1882 and is headquartered in Helsinki, Finland.