How We Built MongoDB to ElasticSearch Sync for $89/Month (And Saved Our Sanity)

How We Built MongoDB to ElasticSearch Sync for $89/Month (And Saved Our Sanity) It was 2 AM on a Thursday when our product search died. Again. I watched the server metrics climb as a single user typed "wireless headphones" into our search bar. 30 seconds later, they got results. Thirty. Seconds. They were long gone by then, and so was the sale. At Avluz.com , we track prices across 10,000+ products from Amazon, eBay, and Walmart. Our MongoDB database held everything beautifully, but searching through it? That was killing us—literally costing us customers and revenue every day. I knew we needed ElasticSearch. But when I looked at the quotes—$1,200/month for Algolia, $450/month for AWS OpenSearch—I felt that startup founder panic. We couldn't justify those costs, but we couldn't survive with 30-second searches either. So we built our own solution for $89/month. Here's exactly how we did it. The Problem: When Your Database Becomes Your Bottleneck Let me show you what we w dealing with: //