A UserZoom competitive UX measurement report

Pick of the bunch

Which online grocery retailers are delivering exceptional customer experiences?

This report is for retail executives who are working to deliver seamless online shopping digital experiences, during a time of accelerated customer demand and fierce competition.

Before we dive into the report, let's quickly discuss the importance of UX measurement and how it can help you identify your place in the market and outpace the competition.

What is competitive UX measurement?

Competitive UX measurement is a way to evaluate the performance of your product’s or service’s user experience relative to your competitors.

UserZoom's approach to competitive UX measurement is unique because:

  • Aligns to strategic business KPIs and revenue-critical experiences
  • Quantifies users’ attitudes and behaviors into a single score to provide a more complete view of the user experience
  • Identifies tactical areas of improvement
  • Consistent across all competitors (we use the same tasks, questions, and screeners each time)

Now let's reveal the US and UK online grocers that we'll be evaluating...


The pandemic put online grocery retailers under huge and unexpected pressure as consumers shifted their entire spend online.

In response to this demand, retailers have had to rethink operations, supply chains, and the entire online experience. Some have struggled to keep websites up and running, others to continue to match customer expectations around delivery and stock availability.

This isn't an isolated challenge, as McKinsey expects a 41% increase in the number of people purchasing groceries online when COVID-19 has subsided.

With more and more consumers planning to shift the majority, or even all, of their spending online, this change in customer behavior will have permanent effects on the retail industry.

As online grocers scale up or adapt to changing customer behavior, the user experience has never been more vital - it’s what enables businesses to retain their new customers and underpin future growth.

How can you ensure your digital experience meets new consumer demands?

Leaders and runners-up

To truly measure our 12 online grocery competitors in an analytically rigorous manner, we use QXscore.

QXscore is a single holistic score that combines behavioral and attitudinal data, plotted on a 100-point index. This meaningful, easily understood standard for measuring user experience identifies tactical areas to improve UX health and can be used to track progress over time, relative to competitors, or across multiple lines of business, digital properties and products.

Both sites also offer a great experience when browsing through categories and searching for specific products. This is a key victory because 'search' was ranked the most important feature by consumers in both regions.

Overall ranking

Using QXscore, this is how the global competitors stacked up against each other.

It’s encouraging to see all sites classified as 'good experiences' with only three of our competing brands on the lower end of 'good' bordering on 'average' experience.

Bottom of the table...

At the other end of the table, we see our lowest ranking US competitor, Kroger, and our lowest ranking UK competitor, Amazon.co.uk.

Lessons from the report

77% of professionals want to track UX improvements over time, and 69% want to see their data relative to competitors, as these are incredibly powerful ways to see the value of UX and communicate the impact UX has on business goals.

However, digital experience professionals struggle to track the results of their activities because they’re unsure of which metrics are most important. 58% of professionals rely on product or site analytics (58%) rather than direct measures of UX. Fewer than half rely on behavioral UX data like task success or time-on-task.

This means they're missing half the story. And if you're missing half the story, you can't provide a completely satisfying customer experience.

With our QXscore, we not only combine attitudinal and behavioral metrics to reveal what users say, do and feel, but we can dive deeper into specific component areas and their related tasks to reveal actionable insights.

Using QXscore, we analyzed the digital experiences of 12 leading grocery retailers across North America and the United Kingdom. Here we’ll take a deeper dive into some of those task-based insights, revealing exactly what consumers are looking for when they visit an online grocer.

Browsing by category

In this task, we asked respondents to browse by categories, without using the search feature.

On average it took Walmart customers less time and fewer pages to complete the task successfully.

Kroger is the bottom performer, with the lowest task success and ease of use, and highest number of problems.

For our UX competitors, Amazon.co.uk had the lowest average time on task and highest ease of use score; but most number of page views, while Sainsbury’s and Morrisons were the most difficult to use and customers experienced the most problems and frustrations.

Why is browsing by category a big deal?

It’s an accessibility issue. Not everyone is able to type into a search tool, and although there is speech recognition software that can input text for users, this may not give the most accurate results.

Accuracy is also a key factor. In this sentence I’ve typed broccoli incorrectly a couple of times, before letting autocorrect takeover. How many retail search tools allow for mistakes or inaccuracies or ‘near enough’ searches?

It’s also a question of preference. There are numerous studies about whether users prefer to use search vs. menu navigation to find what they want, and generally there’s a 50/50 split. So it’s clear that in order to provide a good user experience for 100% of your costumes, you need to optimize for navigation as well as search.

And it also comes down to consumers not having a brand preference, and just wanting to see what’s in stock and the relative price differences. The more information you give your users from the get go, the less they’ll have to root around for the answers and increase the chances they’ll navigate away from your website.

Best practice

Amazon Fresh has helpful images associated with top categories, and clear sub-categorization of products

Walmart has a clear menu structure and filters to help quickly narrow by brand, type, and more.

In our task scorecard, you can see that there's very little between AmazonFresh and Walmart in terms of task success, but it takes far fewer pages to complete a task at Walmart.

Amazon's UK counterpart has clear and easy navigation, with the helpful use of photos in the main category menu. Clear sub-categories make it easy to locate desired individual products quickly.

In the following video, you can see one of our participants navigating Amazon's menu structure during a usability test...

Both Amazon.com and co.uk could also reduce the higher than average number of pageviews needed by including the most important information in the product summary. For example, in the grocery category, very few product reviews are available, making the star ratings much less relevant than say if the item is on sale or if it’s been purchased before.

Using search and save for later

In this task, we asked participants to find and add two packs of Tide pods (US) or Surf Capsules (UK) and some bananas to their basket, and save them for quick access/reordering in the future.

Walmart is top performer here with 100% success, lowest average time on task and pageviews, and presenting the least number of problems.

Amazon Fresh users have lowest success, suffer the most effort, and experience the most problems and frustrations.

For the UK competitors, ASDA customers had the fewest problems and highest ease of use rating and Iceland had the lowest number of pageviews and one of the lowest time on task results.

Tesco and Sainsbury’s customers experienced the most problems/ frustrations mostly due to not being able to save items.

Why is saving for later a big deal?

It’s all about providing convenience, while encouraging repeat visits to your site. If it’s a customer’s first time visiting your site, they may not be ready to do a full shop just yet or are possibly comparing against other retailers, so offering them the chance to save items is a convenient option so they know they’re products are available in a safe and handy place.

Being able to save or favorite items that you regularly shop also encourages repeat visits, as customers know that it will be quicker and easier to shop with you, as there’s a purpose-built shopping list waiting for them.

The speed of online grocery shopping is a key discovery for people new to online shopping, and the faster you make the ongoing process of weekly shopping, the less likely they’ll stray to a competitor.

Best practice

Walmart provides a clear and prominent search bar on the top, and gives relevant search results. Users have the ability to add multiple quantities of items from the results page. There's also a clear indication that an item has been added to the cart, as demonstrated in the usability test video below...

Following your users’ mental models for achieving simple tasks is an effective way to add speed and convenience to your experience. You can suggest an action via short-hand by using the most popular and logical feature. For instance, using a heart symbol to indicate ‘save to favorite’. As you can see in the comparison below, problems and frustrations arise when this mental model isn’t adhered to…

Winning the feature war

When it comes to creating digital experiences your consumers love and keep coming back for, you need to design features that offer convenience, speed and ease. But you won't truly know what's working until you run some meaningful, analytically rigorous testing.

Competitive UX measurement can unlock insight into which of your rivals' features are tempting users to stay and shop, and how they compare against your own product.

The following examples offer a glimpse into what features our participants responded positively to during the studies. But remember, what works for one retail website may not work for you, so running research on any feature development is crucial to understanding your own customers.

Four features consumers loved when grocery shopping

#1: Adding, or opening items, from the search dropdown

ASDA and Iceland were unique in offering the ability to add items to their basket or open the product page directly from the search drop-down.

These two sites were not only the top performers on the search task but also overall.

#2 – Opening the categories menu by default when the page loads

Tesco was the sole grocer to offer this unique feature.

This resulted in a significantly higher number of users browsing by category compared to most other sites

#3: Offering a prominent search bar

Both Kroger and Walmart have a prominent search bar at the top of the page, and large adverts and promotions below. This design made customers more likely to use search than the other retailers

#4 – Offer clear layouts and calls-to-action

Amazon and ASDA customers are more likely to scroll and add items to the basket directly from the home page.

Both sites are designed with a clear layout and calls-to-action that makes it easy for users to directly add items to their basket.

Why UX measurement matters for online grocers

In a highly competitive industry that's seeing increasing demands and pressure from consumers, the need to adapt quickly is essential but this has to be done with complete confidence that it's what your customers demand.

User research is integral to optimizing features and products, and the key to ensuring user-focused product decisions are made is by implementing a UX measurement program tied to business KPIs. This puts a numerical value on UX improvements that you can track and manage.

An analytically rigorous measurement program gives confidence in design decisions. You have concrete evidence to support how UX impacts specific business KPIs and data to sell to leadership teams and stakeholders for further investment and improvements.

Here are our quick-win guides to why you should measure your performance:

Discover how you measure up against your competitors


Remote unmoderated usability testing

Participants follow the on-screen prompts on their own to guide them through the questions and tasks we’re interested in measuring.

Quantitative and qualitative approach: 50+ customers per site:

  • 45 (non-think-out-loud)
  • 5-8 (think-out-loud)

Fielding period: August 20 to October 5, 2020

Who are the participants?

  • n=621 total
  • n=270 (US)
  • n=351 (UK)
  • Mix of genders
  • Mix of ages
  • Existing online customers of the grocer tested