“Yes! MailerLite does exactly that.”
+ A/B split test campaign with automatic winner selection
“It's called an A/B split test campaign, and it can automatically send the winning subject line to the rest of your mailing list.”
+ A/B testing available on Free plan
“A/B testing is available on MailerLite's Free plan too.”
+ Can test subject lines, sender names, and email content
“You can also test sender names and email content.”