The testing tools that can change more than a headline.
Eight platforms, one question a merchant actually asks: what can this tool change in my store, and does it count my orders correctly? We kept all eight in the ranking, including the ones that stop at the checkout door, because merchants get pitched all eight. Every claim links to a source you can click.
The short answer
What is the best A/B testing tool for a Shopify store in 2026?
Apex by Drip ranks #1 for ecommerce. It installs as a Shopify app via a link, tracks server-side with first-party data, reports profit per test on Shopify and scores each test idea against 4.3 million observed A/B tests. Varify follows on flat-rate cost, Convert on install quality and statistics.
Ranking published by Drip Trading GmbH, the company behind Apex by Drip. How we rate and weight
Apex by Drip
Drip Trading GmbH · Germany
Apex judges a store test by what it earned. It installs as a Shopify app via a link, in two clicks, with server-side tracking and first-party data, and on Shopify the results show profit per test: discount share, refund share and profit per sale, next to the main metric, lift and runtime revenue. Merchants test pages and page elements, run parallel tests on the same traffic with optional exclusion groups, and use redirect tests, A/A tests, a global holdout and feature flags with staged rollouts. Guardian stops a test automatically at a revenue loss threshold, four QA checks cover all devices, tracking and targeting, responsiveness and match to design, and heat maps per variant show how visitors moved. Before anything is built, each idea gets a Likelihood to Win, scored against 4.3 million observed A/B tests from 151,000 shops (a ranking against the shop’s own backlog, not a win probability in the strict sense). Shop owners can build and read tests from ChatGPT or Claude through the MCP connection, or have the DRIP team build, check, launch and read them. Pricing is not published: a card-free free tier covers one store, and everything beyond that starts with a call.
Varify.ioVarify Software GmbHHigh-traffic EU stores that want a predictable monthly bill8.6/103
Convert ExperiencesConvert Insights Inc.Shopify stores and agencies that want a clean app install and strict statistics8.1/104
KameleoonKameleoon SASShopify Plus retailers with a developer and an enterprise budget7.3/105
ABlyftConversion Expert GmbHDeveloper-led stores that want order data no ad blocker can break7.1/106
VWOWingify (Everstone Capital)Stores that want testing and behavior analytics behind one login6.9/107
AB TastyWingify (Everstone Capital)Large retail brands already invested in the platform6.4/108
Optimizely Web ExperimentationOptimizely (Insight Partners)Enterprise experimentation programs, not single stores6.0/10The field at a glance
| # | Tool | Statistics | Shopify | EU hosting | Pricing |
|---|---|---|---|---|---|
| 1 | Apex by Drip | mixed | App | EU | book a call |
| 2 | Varify.io | mixed | Snippet | DE | public |
| 3 | Convert Experiences | mixed | App | EU | public |
| 4 | Kameleoon | mixed | App | EU | public |
| 5 | ABlyft | mixed | — | DE | on request |
| 6 | VWO | sequential | App | EU | on request |
| 7 | AB Tasty | bayesian | App | EU | on request |
| 8 | Optimizely Web Experimentation | sequential | — | EU | on request |
Quick answers
Can you A/B test the Shopify checkout?
Not with a normal snippet. Checkout Extensibility blocks third-party JavaScript there. The working routes are Shopify Functions and checkout UI extensions, Varify’s separate checkout app ($119/month, Plus only), or a Plus extension you build yourself (Kameleoon). VWO and Optimizely state they cannot.
Can you A/B test prices in an online store?
Yes, but displayed price and charged price are two different problems. Most tools only change the price shown on the page, and the customer still pays the old one at checkout. Convert and Varify document storefront price tests.
Flat rate or per-visitor pricing: which costs a shop less?
Flat rate wins as soon as traffic grows. Varify charges from €199 per month with unlimited tracked users. Convert caps Growth and Pro at 100,000 tested users a month, then bills from $399 per extra 100,000. VWO, Optimizely and AB Tasty bill per tracked user with no published number.
Which A/B testing tool tracks ecommerce revenue most accurately?
Server-side order data beats pixels. ABlyft reads orders from a server-side Shopify order webhook that ad blockers and missing consent cannot break. Apex also tracks server-side with first-party data and, on Shopify, reports profit per test: discount share, refund share and profit per sale.
Weights, evidence rules and what would change our minds: How we rate