“1. Mailchimp Best straightforward option”
“Best straightforward option”
“Tests up to three variations.”
“Can test subject lines, sender names, content and send times.”
“Automatically selects the winner based on open rate, click rate or revenue (where supported).”
“Sends the winner to the remaining subscribers after the test period.”
“A/B testing is available on paid marketing plans.”
“3. ActiveCampaign Best automation-focused option”
“Best automation-focused option”
“Tests subject lines and sender information.”
“Can also test entire email content.”
“Automatically selects the winner based on open or click rate.”
“Sends the winning version to the remainder after a specified period.”
“An important distinction: its campaign split tests support automatic winner selection, but its newer split testing inside the Send Email automation action requires manual winner selection.”
“4. Klaviyo Best for ecommerce marketing”
“Best for ecommerce marketing”
“Tests multiple subject-line variations.”
“Automatically identifies the winning variation.”
“Sends the winning version to the remaining campaign audience.”
“Supports open rate, click rate and, in eligible configurations, placed order rate.”
“Also offers AI-powered personalized variation selection for eligible large accounts.”
“5. Brevo Good accessible alternative”
“Good accessible alternative”
“Tests two email variations.”
“Allows you to specify the test audience size.”
“Selects the winner based on open or click rate.”
“Automatically sends the winning version to the remaining recipients.”
“Allows test durations of up to seven days.”
“A particularly clear implementation of the exact workflow you're describing.”
“Tests subject lines, sender details and email content.”
“Automatically selects the best-performing variation.”
“Sends the winner to the rest of the audience.”
“Supports testing on all plans, according to its documentation.”
“Worth considering for ecommerce businesses.”
“2. HubSpot Best integrated marketing platform”
“Best integrated marketing platform”
“Tests different email versions on a sample of recipients.”
“Supports open rate, click rate and click-through rate as winning metrics.”
“Automatically sends the winning version to the remaining audience after the configured test duration.”
“Integrates with CRM, segmentation and marketing workflows.”
“Important: Regular marketing email A/B testing requires Marketing Hub Professional or Enterprise.”
“Salesforce Marketing Cloud | Yes | Yes | Campaign sends”
“Mailjet | Yes | Yes | Campaigns”