The retailer has approached agencies via the AAR with a brief to compete for the business.
Dare is the incumbent agency, having won the account in 2010. Its focus since has been on online advertising strategy and creating digital advertising.
Sainsbury’s will continue to work with Dare while adding other digital agencies to its roster.
A Sainsbury’s statement said: "Since we appointed Dare, the digital landscape has diversified and our digital needs have grown. We need to respond to this by drawing on a wider resource base. Dare continues to be a valued agency partner and will take its place on the digital campaign roster without any need to take part in a selection process."
"We will also continue to work together on a number of our owned media properties, including the Live Well For Less website. We look forward to the relationship going from strength to strength."
Sainsbury’s relationship with ad agency Abbott Media Vickers BBDO is unaffected by the review.