A/B testing

Increase Your Sales with A/B Tests in E-Commerce

A/B testing tools such as VWO, Optimizely and Kameleoon offer extensive ways to raise conversion in e-commerce.

Jörg Dennis Krüger · 19 July 2024 · 5 min read

A/B testing tools for e-commerce

Choosing the right A/B testing tools matters for the success of e-commerce websites. There are various tools to choose from that offer extensive options for detailed tests. Well-known tools include VWO, Optimizely and Kameleoon.

They let you test different elements of your e-commerce site and analyse the effect on the conversion rate.

One important feature A/B testing tools should offer is ease of use. The interface should be intuitive and user-friendly so that people without technical skills can run tests too. It’s also important that the tools offer comprehensive reporting. In other words, they should generate detailed reports on test results so the results are easy to interpret.

One example of an A/B testing tool is VWO. VWO lets you create and test different versions of a web page to find out which one achieves the best conversion rate. The tool also offers features such as heatmaps and click maps to analyse user behaviour on the site.

Conversion optimisation through A/B tests

One of the biggest benefits of A/B tests is a higher conversion rate. Systematic testing lets you optimise the smallest details, and those can make a big difference. Optimised landing pages, better calls to action and adapted product descriptions, for example, can raise the conversion rate considerably.

To optimise the conversion rate, you need to keep improving the user experience and respond to customers’ needs and preferences. A/B tests let you create and test different versions of a page to find out which one converts best. That lets you keep optimising the site and raise the conversion rate over the long term.

A practical example of conversion optimisation through A/B tests is optimising the checkout. By changing elements such as the cart layout or the number of checkout steps, you can reduce drop-offs and raise the conversion rate.

A/B testing strategies for online shops

Successful A/B tests need well-thought-out strategies. It’s best to start with hypothesis-based tests, where you check specific assumptions. For example, you could find out whether a different button colour raises the click rate, or whether a changed layout keeps people on the site longer.

Another strategy is the split test, where different layout variants are tested against each other. You create two or more versions of a page and show each to a share of visitors. Comparing the conversion rates tells you which version performs best.

When running A/B tests, change only one variable at a time so the results are clear. If you change several variables at once, it’s hard to tell which one had the biggest effect on the conversion rate.

A/B tests for higher sales

One of the central goals of A/B testing in e-commerce is to increase sales. Targeted changes can improve the shopping experience and usability, which can lead to higher sales.

Product presentation is especially well suited to A/B tests. By using different product images or descriptions, you can find out which version leads to more sales. Another example is the navigation structure. Different arrangements of categories and filters can improve usability and make the site easier to navigate, which can ultimately lead to higher sales.

A/B tests can also help optimise the checkout and reduce abandonment. By adjusting elements such as the cart, shipping options or payment methods, you improve the shopping experience and raise the chance of a completed purchase.

Implementing A/B tests in e-commerce

A/B tests should be implemented systematically to get meaningful results. The process has several steps.

First, define a clear goal. What should the A/B tests achieve? This could be a higher conversion rate, a lower abandonment rate or a better user experience.

Next, create a test plan that defines the elements to test and the expected results. Which elements of the site should be tested? Which changes do you expect, and how might they affect the conversion rate?

Once the test plan is ready, you can run the A/B tests with the tool you’ve chosen. Tests should run for a set period to collect enough data.

When the tests are finished, evaluate the results carefully. Analyse and interpret the data so you can make sound decisions based on the results. It can help to look at different segments of your audience to see whether certain variants work better with certain groups.

Step-by-step guide to implementing A/B tests successfully

  • Set goals: Define clear goals and KPIs you want to reach with the A/B tests. For example, your goal could be to raise the conversion rate by 10%.
  • Choose what to test: Pick the important elements you want to test. These could be buttons, headlines or images.
  • Form a hypothesis: Formulate a hypothesis to check with the A/B tests. For example, that a different button colour raises the click rate.
  • Run the test: Set up the A/B test in the tool you’ve chosen. Create different versions of the page and split visitors into groups for a set period.
  • Collect data: Record the test data over a set period. Make sure you collect enough data to get meaningful results.
  • Analyse: Analyse the results and interpret the data. Compare the conversion rates of the variants and check whether the results are statistically significant.
  • Optimise: Implement the winning variants on the site and repeat the process to keep raising the conversion rate.

Increase your sales with A/B tests in e-commerce that are based on real user data, not trends.

Choosing a tool: the decision matrix

Choosing an A/B testing tool isn’t a matter of taste. It’s a strategic decision. The wrong choice costs months. The right one speeds everything up.

We use a simple decision matrix with four dimensions: traffic volume, technical complexity, budget and team size.


  1. Traffic volume.

    Below 10,000 sessions a month, simple tools such as AB Tasty or GrowthBook are enough. From 50,000 sessions a month you need VWO or Optimizely. From 200,000 sessions a month you need enterprise solutions with server-side testing.


  2. Technical complexity.

    If you only test headlines and button colours, a visual editor is enough. If you need complex logic, personalisation or server-side tests, you need a developer tool.


  3. Budget.

    Freemium tools (Kameleoon, discontinued) cost nothing, but they have limits. Mid-market tools (VWO, AB Tasty) cost €300-1,000 a month. Enterprise tools (Optimizely, Dynamic Yield) cost €5,000-20,000 a month.


  4. Team size.

    A one-person team needs a simple tool. A five-person team needs collaboration features. A twenty-person team needs workflows, permissions management and reporting.

An electronics shop chose Optimizely even though it only had 15,000 sessions a month. It used 10 percent of the features. The cost: €8,000 a month. After switching to VWO at €400 a month, the results were identical. The saving: €91,200 a year.

The right tool speeds up your tests. The wrong one slows you down. Decide strategically. Not emotionally. Not by feature list. But by your concrete requirements.

A/B testing is the path to data-driven decisions. The right tool is your vehicle. Choose it wisely.

Test systematically. Decide based on data. Grow continuously.

The right tool makes the difference.

Success lies in the data.

You’ll find more in-depth material in the Academy track A/B-Testing Mastery ↗.

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