Amazon ElastiCache is a great managed Redis or Memcached service. ElastiCache with the Redis engine is great for caching expensive responses or queries. It is great if you need a distributed mutex. It is great as a message broker. If you need Redis but don't have the resources to manage it yourself, consider ElastiCache. It may not be economical for very large scale installations, however.
Amazon Elasticache is better than Amazon Elasticsearch and Amazon SQS as the former is good for dumping a lot of data for searching purposes later on and the latter is good for maintaining a message bus whereas Amazon ElastiCache purely works as a caching data store to provide faster data access. AWS DynamoDB is a good alternative if you're looking for a serverless solution as in Amazon ElastiCache, we get to see instances while in AWS DynamoDB, we can simply access the data without the need of bringing up a server.
