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Stop relying on assumptions. 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. Make every campaign smarter by continuously learning what your audience responds to best.
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. By comparing real engagement data like opens, clicks, and conversions, you can confidently identify the elements that drive the best results. Instead of relying on assumptions, every campaign becomes an opportunity to learn what truly resonates with your subscribers.
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. The live dashboard tracks every open, click, and conversion in real time, giving you immediate visibility into which variant is outperforming the rest. With clear metrics and live confidence tracking, you’ll know the moment a winning email emerges.
From the moment an email appears in the inbox to the final click that drives a conversion, every element influences performance. A/B email testing allows you to experiment with each component of your campaigns and continuously improve results over time. By systematically testing different variables, you uncover exactly what resonates with your audience and scale the strategies that work.
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 significantly impact engagement. By testing different subject line styles, you can discover what consistently motivates your audience to open your emails.
Email Content
Once your email is opened, the design and messaging determine whether readers engage with your 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 or placement can lead to meaningful 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 most active and responsive to emails.
Sender Name
The sender name and email address influence how trustworthy and recognizable your message appears in the inbox. Testing different sender identities can reveal what builds the most credibility with subscribers.
Personalization
Personalization goes far beyond simply adding a subscriber’s first name. 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. Instead of guessing which subject line will work, you start with data-backed predictions designed to maximize open rates.
Get a predicted open-rate score the moment you write a subject line. The AI instantly evaluates tone, length, wording, and engagement signals so you know which version has the highest chance of success before sending.
The system continuously improves with every campaign. As you run more tests, the AI adapts to your specific audience behavior, learning what subject lines, tones, and formats consistently drive higher engagement.
Running out of ideas? Generate multiple high-scoring subject line variations instantly. The AI analyzes your past campaigns and suggests optimized versions designed to outperform previous results.
TrueSend is designed to make A/B email testing incredibly simple. No complex setup, spreadsheets, or technical expertise required. In just a few steps, you can launch a test and let data automatically determine the winning email.
Clone any existing campaign or start from scratch using the template library. Quickly create a base version for testing without rebuilding your email.
Modify one element at a time, such as the subject line, email content, CTA button, sender name, or send time, so you can clearly measure what drives performance.
Choose how your audience will be divided between variants. Set the percentage split, statistical confidence threshold, and the metric that will determine the winner.
Send both versions and monitor results in real time. Track opens, clicks, conversions, and engagement directly from the dashboard as the test progresses.
Once the confidence threshold is reached, the platform automatically sends the winning variant to the rest of your email list, maximizing performance without manual work.
Designed for modern marketers who care about performance, not complexity. Every feature inside the platform is built to make email A/B testing faster to launch, easier to manage, and more impactful for your campaigns.
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 in open rates across every campaign they run.
Testing CTA placement and copy alone delivers an average of 41% more clicks, without changing your offer or audience.
For every $1 spent running split tests, TrueSend customers generate $3.80 in incremental revenue versus not testing.