With A/B email testing, you can experiment with subject lines, email content, CTAs, send times, layouts, and more, then let real performance data automatically determine the winning version.
A/B email testing, also known as split testing, allows you to send two or more variations of an email to different segments of your audience and measure which version performs better.
Design Variant A and Variant B, changing only one element at a time, such as the subject line, CTA, layout, or send time, so you can clearly understand what caused the performance difference.
Divide your email list into controlled segments and send each variation to a portion of your audience. The platform automatically calculates the ideal sample size to ensure accurate results.
Once the test reaches the required confidence level, the system automatically identifies the winning version and sends it to the rest of your audience for maximum impact.
Watch your A/B email tests unfold as they happen. With clear metrics and live confidence tracking, you’ll know the moment a winning email emerges.
A/B email testing allows you to experiment with each component of your campaigns and continuously improve results over time.
Subject Lines
The subject line is often the most influential factor in whether an email gets opened or ignored. Small changes in wording, tone, or structure can impact engagement.
Email Content
Testing variations in layout, visuals, and copy structure helps identify the format that best captures attention and drives interaction.
CTA Buttons
Your call-to-action is the final step that turns interest into action. Even subtle adjustments to wording can lead to improvements in click-through rates.
Send Time
Timing can have a major influence on engagement. Testing different delivery windows helps determine when your audience is responsive to emails.
Sender Name
The sender name and email address influence how trustworthy and recognizable your message appears in the inbox
Personalization
By testing deeper personalization strategies, you can create more relevant and engaging experiences that significantly increase conversions and revenue.
Our AI engine analyzes every subject line before you even send the campaign, predicting performance using insights trained on billions of historical email interactions.
Get a predicted open-rate score the moment you write a subject line.
The system continuously improves with every campaign.
Generate multiple high-scoring subject line variations instantly.
TrueSend is designed to make A/B email testing incredibly simple. No complex setup, spreadsheets, or technical expertise required.
Clone any existing campaign or start from scratch using the template library.
Modify one element at a time so you can measure what drives performance.
Choose how your audience will be divided between variants.
Send both versions and monitor results in real time.
The platform automatically sends the winning variant of your email list.
Designed for modern marketers who care about performance, not complexity.
Audience segments are split using fully randomized distribution methods, ensuring unbiased test groups every time. This eliminates selection bias and guarantees your results remain statistically reliable.
Learn moreDefine your preferred confidence threshold, whether 80%, 90%, or 95%; and the system automatically sends the winning email variant to the remaining audience once the threshold is reached.
Learn moreGo beyond simple A/B experiments. Test multiple variations simultaneously to discover the best combination of subject lines, design, content, and CTAs faster.
Learn moreExperiment with different delivery times across time zones and subscriber behavior patterns. Over time, the platform identifies the optimal send window for each audience segment.
Learn moreRun separate experiments for different subscriber groups simultaneously. For example, VIP customers, returning buyers, and new subscribers can each receive tailored test variants.
Learn moreMove beyond opens and clicks. Connect campaign results directly to revenue to understand which email variant actually drives sales and conversions.
Learn moreEvery test you run is automatically stored and organized. Search past experiments, compare performance, and build a growing knowledge base of what works best for your audience.
Learn moreStay informed the moment results are finalized. Receive instant notifications via email or Slack when a winning variant is declared or when key milestones are reached.
Learn moreAdvanced statistical checks ensure your results remain valid. Built-in safeguards prevent premature decisions by enforcing minimum sample sizes and proper significance thresholds.
Learn more
TrueSend customers who run A/B tests consistently outperform those who don't, across every metric that matters.
Customers who consistently test subject lines see a compounding improvement
Testing CTA placement and copy alone delivers an average of 41% more clicks
TrueSend customers generate $3.80 in incremental revenue versus not testing.