The purchase is part of Vivaldi’s growth strategy and adds social and digital marketing skills to its business, brand strategy and data analytics services.

The two companies are already working together on clients in the enterprise software, tourism and retail sectors.

Gravity Thinking’s managing partners Stephen Firth and Andrew Roberts will join Vivaldi’s leadership team and continue to be based in London. All of Gravity Thinking’s staff will be retained and will work closely with Vivaldi’s global team across its nine offices, including New York, Chicago, Toronto, Buenos Aires, London, Zurich and Munich.

Gravity Thinking was founded in 2007 by managing partners, Andrew Roberts and Stephen Firth.

Tom Ajello, Vivaldi’s global chief creative officer, said: “Our industry still operates in silos. Yet people and brands have evolved – we are the only independent global player that has the passion and persistence to successfully merge what others have kept separated for too long.”

Gravity Thinking was advised by growth and M&A specialists Waypoint Partners.