CloudSearch
- Amazon CloudSearch is a fully managed service in the cloud that makes it easy to set up, manage, and scale a search solution for your website.
- It enables you to search extensive collections of data such as web pages, document files, forum posts, or product information.
- Add search capabilities to your website without becoming a search expert or worrying about hardware provisioning, setup, and maintenance.
OpenSearch (ElasticSearch)
- It is a managed service that makes it easy to deploy, operate, and scale OpenSearch, a popular open-source search and analytics engine.
- OpenSearch Service offers security options, high availability, data durability, and direct access to the OpenSearch API.
OpenSearch documentation