Accessible at and still in beta, the mobile marketplace is designed for customers who want to build and manage their own campaigns and offers aggregated premium European inventory.
A company spokeswoman said: "We are creating more transparency for advertisers so return on investment should be higher for certain segments."
"In some instances there will be a reduced cost, but we will also be implementing a bidding system, so if a certain publisher or channel is performing well then the price will vary if lots of advertisers want to be visible on these areas of the market place that are performing well."
The company has local offices in eight countries – the UK, France, Spain, Germany, Italy, Russia, Netherlands and the USA.
Buongiorno! Digital, which also calls itself B!Digital, said its rebrand is designed to address the convergence of mobile and internet campaigns, with consumers increasingly viewing web pages on the mobiles.
Adhish Kulkarni, managing director at B!Digital, said: "The new brand and interactive website represents the best way for us to present our offering to the market which now needs a variety of options.
"Companies in the early stages of digital marketing require end-to-end managed services while more mature players want to build and manage their own campaigns."