Amazon Prime Versus Walmart+: A Clear Winner and Dual Memberships
Amazon Prime is the clear winner when it comes to subscriber count, but Walmart+ has taken over a complimentary role to stay relevant.
Market Winners
What is remarkable about the United Kingdom eCommerce market? The market has produced top online grocers over the past thirty years, from Tesco to Sainsbury's to Ocado, dominating not only Grocery eCommerce in the UK.

Antonia Tönnies
Data Journalist
March 04, 2025
Retailers

No time to buy groceries after work? No worries, online shopping can do just about anything. On one particular island, it's been commonplace for much longer than in other developed eCommerce countries: we're talking about the United Kingdom.
If there is one thing the United Kingdom is good at in eCommerce, it is certainly supermarkets and Grocery. A glance at the leading online stores in the UK reveals that – after the generally dominant online store amazon.co.uk – most of them are online grocers. Online supermarkets already have a longer history in the UK: Tesco Plc, J Sainsbury Plc and ASDA Stores, Ltd., for example, expanded their online influence back in the 1990s – one could say they are the OG's in this segment.
The former has been online since 1994, and last year generated almost US$5 billion in grocery net sales – 63.5% of its total net sales. This puts tesco.com as the number one online grocer in the UK. Although the growth rate of 8.5% in 2024 is slightly above the average growth rate, ECDB analysts expect a further decline from once 11.6% in 2023 to 3.5% in 2025. For other online shops, this could be an opportunity.
An online store specializing in Grocery shopping with future potential is ocado.com. The online retailer has a remarkably high AOV of US$150, which includes purchases across all product categories via the retailer. In comparison, the leader in this ranking has an AOV of US$117, while the average AOV in the UK amounts to US$118.5. The other top online Grocery retailers have even lower AOVs, ranging from US$51 at sainsburys.co.uk to US$57 at asda.com and US$58 at morrisons.com.
So why does ocado.com have such a high AOV? The online-only store is owned by the Marks & Spencer Group Plc, which specializes in product development, and the Ocado Group, which focuses on technology and logistics. This combination enables ocado.com to offer a wide range of products beyond groceries. M&S provides the online retailer with products such as Care Products and Fashion at a higher price point than typical supermarkets, increasing the AOV.
The Ocado Group was founded in 2000 and over the years has built up a so-called Ocado ecosystem consisting of various Customer Fulfillment Centers. The group partnered with affiliate online stores, among other things in France and the United States to expand its network and make use of cost-saving effects this way.
The UK's fifth-largest online grocer, morrisons.com, which was Ocado's first partnership, is benefiting too. The success of morrisons.com, which generated net sales of US$1.2 billion last year, is partly linked to Ocado – and vice versa. They have managed to cut costs while attracting customers with lower prices and faster delivery – a win-win situation for all.
Related Articles
Amazon Prime is the clear winner when it comes to subscriber count, but Walmart+ has taken over a complimentary role to stay relevant.
The global number of mid-sized retailers is declining from 9,133 to 9,042 between 2023 and 2025. Subsequently, they are losing their grip on overall e-commerce revenues. Why market concentration is a threat to smaller businesses.
Amazon.com is by far Amazon's most important domain, but its relative importance in US e-commerce doesn't reflect that. The underlying market structure explains the divide.
Click here for
more relevant insights from
our partner Mastercard.
Our Tool
We’re not just another blog—we’re an advanced e-commerce data analytics tool. The insights you find here are powered by real data from our platform, providing you with a fact-based perspective on market trends, store performance, industry developments, and more.
Analyze retailers in depth with our extensive Retailer dashboards and compare up to four retailers of your choice.
Learn MoreCombine countries and categories of your choice and analyze markets in depth with our advanced market dashboards.
Learn MoreCompile detailed rankings by category and country and fine-tune them with our advanced filter options.
Learn MoreDiscover relevant leads and contacts in your chosen markets, build lists, and download them effortlessly with a single click.
Learn MoreBenchmark transactional and conversion funnel KPIs against market standards and gain insight into the key metrics of your relevant market.
Learn MoreOur reports provide pre-analysed data and highlight key insights to help you quickly identify key trends.
Learn MoreFind your perfect solution and let ECDB empower your e-commerce success.