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Sender > Features > Email A/B Testing

Introducing Experiments

A/B test your way to success

A/B testing turns your hunches about what might work into real, concrete data you can trust. With Sender’s email A/B testing tools, you’ll uncover what resonates most with your audience and turn every campaign into a chance to grow faster.

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No Credit Card Required. Cancel Anytime.

Join over 180,000 companies using Sender

Optimize email conversions using A/B testing strategies

29%

improvement in conversion rates is typically achieved by A/B testing subject lines.

(Growbo, 2025)

37%

higher email marketing ROI is achieved by brands that A/B test every email.

(Litmus, 2019)

Up to 25%

higher open rates are possible when testing the optimal sending time compared to sending at random times.

(Optimazely, 2024)

What to test?

Subject lines

Test whether your audience wants you to get to the point or spell everything out in subject lines. Find out if emojis make you relatable or unprofessional, and whether "act now!" urgency drives clicks or just drives people crazy.

Email content

Test if your readers want a simple, single-column layout or prefer multiple columns with more to explore. Experiment to find the CTA that practically clicks itself, and figure out whether your audience prefers pretty pictures or text.

Time & frequency

Discover when your audience actually wants to hear from you. Find your sweet spot between staying top-of-mind and becoming that sender who won't take a hint, and make sure your emails land when people are ready to read them.

Sender information

Test whether your readers prefer hearing from "Sarah from Marketing" or your company name. Find out which department email address gets the best response (hint: it's rarely noreply@) and whether letting people actually reply to you builds trust.

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Statistical significance
tracking

Numbers don't lie, but they can be confusing. Our statistical significance calculator tells you straight up when you've got enough data to call a winner.

Real-time results
dashboard

Watch your A/B testing in email marketing happen live. See which version's winning while the campaign's still running. Make decisions based on what's happening right now.

Integration
capabilities

Pull behavioral targeting data from your CRM, ecommerce store or other platform, apply segmentation and personalization, and run smarter email marketing test campaigns.

How does email split
testing work?

Create test variations.
Send and track results.
Winner email is sent out to everyone else.

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No Credit Card Required. Cancel Anytime.

Easy integrations with popular tools

Website integration is a breeze with Sender. Connect instantly with leading content management systems, CRMs, and ecommerce platforms, including Wordpress, PrestaShop, WooCommerce, Zapier, and more.

WordPress

WooCommerce