Who competes with relevance marketer dunnhumby?

Answer 1

TNS TNS operates a diary panel using a representative sample of consumers across all channels. Dunnhumby operates a loyalty card for Tesco. So, while TNS provides time series information on Tesco shoppers; a) the TNS sample size is less robust

b) TNS's diary system is prone to huuman error, leading to data "holes". The loyalty card avoids this by entering data electronically at the point of purchase.

TNS operates on a global scale. Dunnhumby is UK focused, but expanding fast into US, Australia etc If you define Dunnhumby's business as providing insight on the behaviour of Tesco shoppers, then I don't think anybody else comes close to competing. Certainly, I don't think the folks at Tesco do. They insist on suppliers using Dunnhumby data for all their presentations. By the way, Dunnhumby is 51% owned by Tesco...