In a comprehensive comparison of Elasticsearch 8.7 and OpenSearch 2.7, Elasticsearch consistently outperformed OpenSearch across various performance metrics, demonstrating a speed improvement of 40%–140% in key areas such as text querying, sorting, date histogram, range, and terms. The study highlighted Elasticsearch's superior resource efficiency, using less disk space and optimizing data compression better than OpenSearch. The testing involved creating equivalent clusters for each platform and running extensive queries to ensure statistical accuracy, validated by a third-party enterprise strategy group. The findings suggest that Elasticsearch offers a compelling choice for organizations requiring fast, efficient, and accurate search capabilities, making it particularly suited for use cases in ecommerce, security analysis, and large-scale observability.