Redis themselves offer a managed service. There's https://www.envkey.com/ and several alternatives. Elasticsearch offers 3 completely different tiers of support and offerings.

Everyone going to AWS is going there for an AWS-like experience. As someone who runs pretty big workloads on AWS, you still very much need the help when you get to a certain scale, and there is a ton of value in just buying a support contract from Elastic or Redislabs, even when using their managed services or running it on an ec2.