I judge each option using two questions before looking at the price. Does a test keep one destination URL, so an ad never has to be edited? Google's campaign editing guide explains what changes when you edit an ad. And does the page match what the ad promised, which Google scores as landing page experience?
I would shortlist the first three, then decide with a real test. Evan Miller's How Not To Run an A/B Test explains why you should fix the sample size before a test starts, and our split test sample size calculator works out how many visitors and how many days that requires.
1. PageFly
Best Replo alternative for keeping the page on the Shopify domain for less
Offers a free plan, or starts at USD 24/mo.
I would switch to PageFly when the landing page needs to use the Shopify URL already in the ads. The Builder plan includes the drag-and-drop editor. A/B testing starts on Optimize, and the free plan publishes one page or section. See PageFly's pricing page.
Read the full PageFly review
2. Leadpages
Best Replo alternative for one ad URL off the store
Starts at USD 99/mo.
I would choose Leadpages when the test has to keep a single address and the page does not need to live on Shopify. Its server-side testing is the reason to switch. See how Leadpages runs its tests.
Read the full Leadpages review
3. Swipe Pages
Best Replo alternative for a fast mobile page on Meta
Starts at USD 29/mo.
Swipe Pages builds fast mobile pages for Meta ads, and the order can still be completed on Shopify. I would choose it when the Shopify theme is a poor fit for visitors from a cold ad. See the Swipe Pages review.
Read the full Swipe Pages review
4. Landingi
Best Replo alternative for a cheaper hosted plan outside Shopify
Starts at USD 24/mo.
Landingi is the hosted builder I would consider when the account is small and the page should live off the store. Check which plan includes testing before you assume the cheapest paid plan has it. See the Landingi review.
Read the full Landingi review