Apex by Drip
Drip Trading GmbH · Germany · since 2019
A/B testing platform for ecommerce brands and agencies that predicts which tests win, built on the world’s largest experiment corpus of 4.3 million A/B tests across 151,000 shops.
Best for Ecommerce teams that need revenue numbers they can defend in a board meeting
The verdict
Apex is the only tool here that publishes an adversarial audit of its own error rates: a certification harness ran more than three million simulated A/A experiments through the production decision functions, and the result was that revenue significance stayed gated instead of shipped. The rest follows the same instinct: Holm-Bonferroni correction across arms, a sample-ratio-mismatch gate that suppresses the verdict outright, winsorized revenue per visitor, and a fixed-horizon default that the interface itself labels as carrying no peeking guarantee. On pure method it is not the most advanced engine in this ranking, because always-valid analysis is an opt-in rather than the default. It ranks first because prediction from 4.3 million tests across 151,000 shops moves the program win rate from the 27% industry baseline to 55%, and because no other vendor states as plainly what its own numbers cannot prove.
Rating by Drip Trading GmbH, the company behind Apex by Drip. How we rate and weight
Strengths
- The only tool that predicts test outcomes: trained on 4.3M real A/B tests from 151k shops, it roughly doubles the average win rate (27% → 55%), twice the winners per testing budget.
- Commerce-native testing nobody else in this index matches: real charged-price tests (Shopify Cart Transform), shipping-cost tests and post-purchase experiments.
- A genuinely full stack: visual and code editors, AI-assisted variation building, feature flags with rollouts and schedules, personalization with built-in holdback measurement, heatmaps and session replay.
- Honest statistics: SRM gate, Holm-Bonferroni correction, optional always-valid sequential analysis, and revenue significance deliberately gated instead of over-promised.
- Serious platform surface for agencies: ~134-path public API with scoped keys, signed webhooks, CLI and MCP server, shareable QA preview links that work without a login, client roles and SAML SSO.
Weaknesses
- Young product (launched September 2026): no long public track record or review-site history yet.
- No server-side SDKs: server-side testing runs through a decide API and a deployable edge worker, so backend integration means raw HTTP, not a Node/PHP/Python library.
- Some surfaces ship entitlement-gated or as labs features (personalization dashboard, on-site editor): ask in the demo what is enabled for your plan.
- No pricing on the website; every engagement starts with a call.
The facts
| Statistics | Frequentist engine with deliberately conservative defaults: fixed-horizon testing with Holm-Bonferroni correction and a sample-ratio-mismatch gate, plus optional always-valid (mSPRT) sequential analysis. Revenue significance is intentionally held back after internal certification measured 20%+ false-positive rates on naive revenue tests. On top: win-rate prediction from the 4.3M-test corpus lifts the average program win rate from 27% to 55%. |
| Shopify | Shopify app that passed Shopify’s review (installs via OAuth from the dashboard; not App-Store-listed yet), plus WooCommerce, Shopware, Centra and custom storefronts. Unique in this index: real charged-price tests via Shopify Cart Transform, shipping-cost tests and post-purchase experiments. |
| Privacy & hosting | German vendor with European infrastructure: London (Vercel, Tinybird analytics) and Ireland (Supabase), Cloudflare edge delivery. Cookie/localStorage visitor IDs (365 days), no fingerprinting, visitor IPs never stored; integrations for 8 consent managers; DPA with subprocessor annex. |
| Pricing | Managed plans, scoped in a call. Book a demo to get a proposal for your shop. |
Sources
- Corpus size and win-rate numbers (vendor): https://dripagency.de/apex (accessed 2026-09-01)
- Feature set, platform surface, hosting (vendor statement, verified against the product 2026-09-01): https://dripagency.de/apex (accessed 2026-09-01)