Over the first three years of the agreement they are to identify a further 20 sites.
Currently, the two companies are looking for suitable locations to establish three automated warehouse facilities. "But the multitude of things we think we can do was what really got us over the finish line". "We are actively creating a seamless digital experience for our customers".
Rodney McMullen, chairman and chief executive of Kroger, said the partnership would allow it to "speed up our efforts to redefine the food and grocery customer experience".
"Ocado's unique, proprietary and industry-leading technology is set to transform the shopping experience of consumers around the world".
The Ocado CEO said his firm will work with Kroger to roll out up to 20 robotic warehouses across the USA over the first three years of the agreement.
The heated grocery wars have pressured No. 2 player Kroger, which issued cautious full-year profit guidance back in March amid rising competition.
Kroger Buys Stake in Online UK Grocer Ocado
Ocado has broken off talks with other U.S. supermarket chains following the deal with Kroger, which operates nearly 2,800 stores across the USA under various brands.
Ocado said its "transformative" entry into the United States market centred on sharing its technology with Kroger, which had annual sales of $122bn (£90.4bn) in 2017.
"This model - a pure-play retailer using its platform as service support - was very successful for Amazon a decade ago, and this could potentially be a similar game changer for Kroger", she explained.
Ocado has always been considered a weak link in the supermarket sector by some analysts who brand it grossly overvalued. The Kroger partnership represents the fourth agreement Ocado has made during the past six months, although this represents its first foray into the US market.
The world's largest retailer reported a 3.1 percent decline in first quarter U.S. EBIT.
European Union prepares measures to protect from United States sanctions on Iran
"With the nuclear deal in place we have better chances to address any other issue.with Iran ", Mogherini said . The EU vowed on Tuesday to seek ways to work and trade with Iran.