The research firm offers services such as ad monitoring and vouching. The deal with GroupM is significant because its agencies, MindShare, MediaCom and Mediaedge:cia, decide how to spend a combined 25% of all UK ad budgets.
As part of the partnership, GroupM and all its agencies will use the enhanced and tailored Thomson Intermedia services and promote its client system to its customer base of more than 650 UK advertisers.
Nick Theakstone, chief operating officer of GroupM UK, said: "Thomson Intermedia's systems have now become an essential ingredient in adding value to our clients, its products aid us in providing clients with accuracy and timeliness of data. This partnership will support our desire to provide the best transparency and vouching products to all our clients."
Thomson Intermedia, which is listed on the Alternative Investment Market in London, said that the deal had been made possible by investments in technology and improvements in data services.
Sarah Jane Thomson, joint-chief executive of Thomson Intermedia, said: "This is an exciting and significant partnership for us, it represents a tipping point for Thomson Intermedia's products becoming the UK standard and could have a profound impact on the speed of increasing our subscriber base."
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