Created in 1871, Tranquilidade is a trademark held by Seguradoras Unidas, SA, the second greatest non-life insurance operator in Portugal with a 15% market share. In the market, they operate under two brand names: Tranquilidade (for Portugal and Madeira) and Açoreana (for the Azores).

With a complete and specialised range of offers, including Life Risk and Group Health, for individuals and businesses as well a large network of professional insurance mediation throughout the country, Tranquilidade is investing on innovation, proximity, simplicity, and service quality in order to be the best choice for mediation Partners and Clients.

Tranquilidade has been a member of Insurope since 1978.