Every plan (even the 50$ one!) includes Elastic Search and Redis (on top of MySQL of course). No need for integrating with external services to add functionality to your site.
Everything you need to run a secure, high-performance WordPress installation is included in the price, and everything is managed for you. You don’t need to learn how to deploy and manage Redis, Elastic Search or any other service. When you backup your site, we make a full copy of everything.