It is understood that the launch will include TV ads, as part of an integrated campaign across Europe.
The new drink is a premium brand of cachaca, a raw sugar-cane alcohol, and is better known as the alcohol base of a caipirinha cocktail.
Cachaca is a popular drink in Brazil, where 1.3 billion litres are consumed every year, but this is the first attempt to introduce it across Europe.
Kevin Dundas, the chief executive of Saatchi & Saatchi, said: "Sagatiba has enormous potential, so we are thrilled to be its partner and launch this new brand throughout Europe."
A media agency has yet to be appointed.
Alex Pinedo, the marketing director of Sagatiba, said: "We are looking for Saatchis to deliver a powerful creative idea in a complex and cluttered market and to create a world-class Brazilian brand. We are confident that it will provide advertising with genuine cut-through."
The Sagatiba brand is owned by the South American company B4.