Tieto Oyj operates as a software and digital engineering company in Norway, Sweden, Finland, and internationally. It operates through four segments: Tieto Tech Consulting, Tieto Banktech, Tieto Caretech, and Tieto Indtech Services. The Tieto Tech Consulting segment provides business advisory and design, data engineering, and other software research and development services. The Tieto Banktech segment offers Banking-as-a-Service platform and software products for payments, cards, wealth management, financial crime prevention, and credit domains. The Tieto Caretech segment provides modular, open, and interoperable software for customers in the health and social care sectors. The Tieto Indtech segment offers software and services to various industries, such as case management, pulp, paper, and fiber; and supports processes, including billing and invoicing and industry messaging, as well as purchase-to-pay process automation. It serves automotive, banking and financial services, education, energy and utilities, healthcare and welfare, manufacturing, public sector, pulp, paper, fibre, packaging and tissue, and telecom sectors. The company was formerly known as TietoEVRY Oyj and changed its name to Tieto Oyj in March 2026. Tieto Oyj was incorporated in 1968 and is headquartered in Espoo, Finland.