Vector (Hybrid) Search Live A/B Test Results in E-commerce (DIY) Sector

Istvan Simon • Location: Theater 5 • Back to Haystack 2024

“We have statistically significant A/B test results for our Vector (Hybrid) Search for 2 of our large DIY retail clients E-commerce website.

This was a 50-50 user split A/B test. The 2 variants were:

  1. Prefixbox’s existing, manually-optimized Search Engine
  2. Prefixbox’s Vector (Hybrid) Search

Results from 1 of the tests are the following: 21% revenue increase for search users 12% increase in transactions for search users 17% increase revenue for overall site visitors 11% increase in transactions overall site visitors 5.7% increase in SERP clicks

We are using ElasticSearch both for keyword and vector search. We use OpenAI’s embeddings.

In this talk, we are going to explain:

Istvan Simon


Istvan Simon is the CEO and founder of Prefixbox, an AI-powered E-commerce site search solution. While working on Bing at Microsoft London, he was inspired to build a service that would help retailers optimize their online stores, and thus Prefixbox was born 10 years ago. With more than 20 years of technical experience, he brings the ground-breaking ideas that make Prefixbox so powerful.