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 first for ecommerce. It is the only tool in this ranking that changes the price a customer is actually charged (Shopify Cart Transform) and tests shipping offers and post-purchase upsells. 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 is the only tool here that reaches past the storefront into the money: Shopify Cart Transform makes the tested price the price the customer is actually charged, and shipping offers and post-purchase upsells are first-class test types instead of workarounds. Results sit on order-level revenue with refunds, deduplication, average order value and revenue per visitor, and a prediction model trained on 4.3 million tests from 151,000 shops lifts the average program win rate from 27% to 55%. Two honest caveats: the commerce surfaces are switched on per shop by Apex staff rather than self-serve, and revenue significance is deliberately gated in code after an internal certification measured false-positive rates above 20%. The Shopify app passed Shopify’s review but is not App Store listed, so merchants install through a direct link, and pricing only exists in 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 (Apex), 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. Apex uses Shopify Cart Transform, so the tested price is the charged price. 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 and Apex read orders from Shopify webhooks, so ad blockers and missing consent cannot silently drop revenue. Apex also deduplicates by order, models refunds and tests revenue per visitor, but holds back the revenue winner call as uncertified.
Weights, evidence rules and what would change our minds: How we rate