Stop guessing which message wins
Test subject lines, content, send times, channels and offers with proper sample sizes. A/B Lab tells you when a result is real, and can send the winner to the rest of your audience automatically.
B earns more per recipient with 97% confidence. Rolling out B to the remaining 80% of the audience.
Compare subject lines and preview text on open rate, click rate or revenue per recipient.
Test layouts, hero images, product blocks, copy length and calls to action.
Free delivery against 10% off, or no coupon at all. Measure orders and margin, not just clicks.
Morning against evening, email against WhatsApp, or AI timing against a fixed send.
Results show confidence and expected lift in plain words, so nobody has to read statistics tables.
Split any journey step and keep the test running until a winner is found, then lock it in.
Subject, content, timing, channel or offer.
Opens, clicks, orders or revenue per recipient.
Test on a share of the audience or all of it.
Send it to the rest, manually or automatically.
Small differences on small samples are often noise. A/B Lab shows the sample size needed and waits for enough data before calling a winner.
Finished tests are saved with their variants, results and notes. Before writing a new campaign, check what has already worked for your audience.
For promotions, revenue per recipient is usually best. Open rate is useful for subject lines but can be affected by privacy features in mail apps.
Yes, up to six variants per test.
No. Every variant must follow the same content rules as any other message.
Up to 2,000 contacts on One Bar, with Email Studio and Audience Lists. No card needed. Upgrade only when your list grows.