Eight tools, twenty-eight matchups, one win record.
Every tool meets every other tool once. Each matchup is decided criterion by criterion, and whoever holds more than half the criteria weight wins it. The order below is a win record, not a mood: it changes when a fact changes, and every fact links to a source you can click.
The short answer
Which A/B testing tool wins the most head-to-head comparisons?
Apex by Drip wins 6 of its 7 matchups and draws the seventh with Kameleoon. Varify follows with 6 wins and 1 loss, Convert with 5 and 2. Each matchup is decided on five criteria: statistics validity 25%, commerce testing 25%, platform breadth 20%, pricing transparency 15%, privacy 15%.
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 by Drip wins six of its seven matchups and draws the seventh with Kameleoon. It takes the commerce criterion against every tool in the field, the only one here that tests the price a customer actually pays through Shopify Cart Transform, plus shipping cost and post-purchase steps, and it ties Optimizely at the top of statistics validity with Holm-Bonferroni correction, a sample-ratio-mismatch gate and optional always-valid analysis. It loses platform breadth to Optimizely, VWO, Kameleoon, AB Tasty and Convert, which all ship server-side SDKs where Apex offers only a decide API and an edge worker. It loses pricing transparency to Convert, Varify and Kameleoon, because Apex publishes no price at all: every engagement starts with a call.
Varify.ioVarify Software GmbHHigh-traffic EU shops that want a fixed invoice and bring their own statistics discipline7.0/103
Convert ExperiencesConvert Insights Inc.Agencies and practitioners who will be asked to defend the statistics behind a result6.6/104
VWOWingify (Everstone Capital)Teams replacing a testing tool plus an analytics tool with a single contract5.9/105
KameleoonKameleoon SASRegulated and consent-heavy sites that must prove where every byte goes5.4/106
Optimizely Web ExperimentationOptimizely (Insight Partners)Large organisations with in-house engineers and a formal experimentation program2.8/107
AB TastyWingify (Everstone Capital)Existing customers weighing whether to stay through the VWO consolidation2.2/108
ABlyftConversion Expert GmbHDeveloper teams that would rather store nothing than configure consent2.2/10The 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 | VWO | sequential | App | EU | on request |
| 5 | Kameleoon | mixed | App | EU | public |
| 6 | Optimizely Web Experimentation | sequential | — | EU | on request |
| 7 | AB Tasty | bayesian | App | EU | on request |
| 8 | ABlyft | mixed | — | DE | on request |
Quick answers
Varify or ABlyft: which German A/B testing tool wins?
Varify wins 60 to 25. It takes commerce testing, platform breadth and pricing, with Shopify revenue import, a server-side API and published prices from 199 euro a month. ABlyft takes statistics validity, frequentist or Bayesian per experiment against Varify’s one-sided default, and the two draw on privacy.
VWO or Optimizely: which one wins the matchup?
VWO wins 75 to 25. It takes commerce testing, platform breadth, pricing access and privacy: a Shopify app, eight server-side SDKs plus heatmaps and a CDP, a 30-day trial and an EU data region. Optimizely takes only statistics validity, with its always-valid Stats Engine and false-discovery-rate control.
VWO vs AB Tasty after the merger: are they still competitors?
No. Everstone Capital merged Wingify (VWO) and AB Tasty in January 2026, and in June 2026 all French AB Tasty development teams were cut. They are sister products now. In the matchup VWO wins 100 to 0, taking all five criteria, from statistics and Shopify support to pricing access and EU hosting.
Convert or Varify: which one wins the matchup?
Varify wins 55 to 45. It takes commerce testing, pricing and privacy: unlimited tracked users from 199 euro a month against Convert’s 100,000-user cap, plus German cookieless hosting. Convert takes statistics validity with sequential testing and SRM checks, and platform breadth with feature flags.
Apex by Drip or VWO: which one wins the matchup?
Apex wins 65 to 35. It takes commerce testing, since VWO cannot test the Shopify checkout while Apex tests the charged price through Cart Transform, plus statistics validity and privacy. VWO takes platform breadth with eight server-side SDKs and a CDP, and pricing access with a 30-day trial.
Weights, evidence rules and what would change our minds: How we rate