Staff from Van, co-founded by Mark Cooper and Matt de Leon a decade ago, have relocated to Richmond Towers’ Frith Street, London offices as part of the deal.
It will become a separate division within the parent agency, joining the food and drink teams, the sustainability-focused Eco agency and social media specialist Straight Social.
de Leon joins the Richmond Towers board to direct the Van team while Cooper remains with the business as a consultant.
de Leon said: "This is a great opportunity to put two very effective businesses together and offer clients more as a result. Van has had a fantastic first 10 years, delivering creative solutions and brand reputation management consultancy to companies that range from challenger brands to UK market leaders and global household names.
"The time is now right to take Van to the next level, so we’re delighted to be joining Richmond Towers and continuing our journey."
Richmond Towers MD Rob Metcalfe added: "We have known the Van team and admired its work since it launched in 2004 and look forward to building the business further over the coming years."
Van currently works with clients including Volkswagen, Iceland and Illy.