What is A/B Email Testing Tool?
It’s a data-driven feature that removes the guesswork from your campaigns. By automatically sending two slightly different email variations, such as testing different subject lines, messaging templates, or send times, to small sample groups, it identifies which version performs best. The winning version is then sent to the rest of your audience. Ultimately, it maximises open rates and review completion rates, helping you collect far more authentic customer feedback with total confidence.
Read real success stories
Lovat Parks let customer data lead and gained a 52% uplift in transactions
Lovat Parks run 50+ A/B tests a year to let data lead their strategy. Discover how switching to the Feefo widget drove a 51.5% increase in ...
March 20, 2026
LV= brings transparency back to finance
Opening itself up to unedited customer comments was a bold move in an industry low on trust, so to help make this leap LV= engaged with Fee...
September 14, 2019
FAQs
What does the A/B testing tool measure?
The A/B testing tool measures Response Rate (Email Template & Scheduling), Email Open Rate (Subject Line & Scheduling), and Form Completion Rate (Email Template, Scheduling & Subject Line).
Can the A/B testing tool be split by tag or SKU?
Yes, a certain test can be sent based on a specified tags or SKUs.
Can the A/B test be for a set, limited time?
Yes, the A/B test can be scheduled to run for a specific date period. We recommend a minimum of 3 weeks for reliable results.
How many tests can I run simultaneously?
You can run one A/B test at a time on a single variable (Subject Line, Template, or Schedule). This ensures your results are accurate and easy to attribute. Depending on your package, you are typically allocated 3 to 5 tests per year.
What is the minimum sample size for reliable A/B results?
Feefo recommends a minimum duration of 3 weeks rather than a specific number of emails. This ensures the data accounts for weekly shopping habits. For the results to be reliable, you must also ensure you are only testing one variable at a time to isolate the cause of any performance changes.
Book a demo
What you can expect next:
A brief conversation to align goals and priorities.
See a personalised demonstration of our platform.
To speak with a real, local human.
