Knowband offers OpenCart Elasticsearch extension for allowing the e-merchant to store the entire product catalog on the server. They can also provide search and autocomplete suggestions to the users.
Install OpenCart on Ubuntu 18.04 - Tutorials and How To - CloudCone
OpenCart - OpenCart Elasticsearch
FlexPod Datacenter for Hybrid Cloud with Cisco CloudCenter and
Brainy Filter for OpenCart / Giant Leap Lab
OpenCart Elasticsearch Advanced Vendor Search Engine
OpenCart Elasticsearch Advanced Vendor Search Engine
OpenCart Elasticsearch Advanced Vendor Search Engine
OpenCart - Elasticsearch for OpenCart
Opencart Marketplace Aramex Shipping - WebKul
ElasticSearch Hosting. Elastic Press WordPress
GitHub - adempiere/proxy-adempiere-api: Storefront GraphQL API