AWS offers two main ways to run Redis in the cloud: Amazon ElastiCache for Redis or managing your own Redis instances on Amazon EC2. The cost of these services depend on various factors including instance types, data transfer, and additional features.
Amazon ElastiCache is a fully managed service that simplifies the setup, operation, and scaling of a distributed cache environment on the AWS Cloud.
You can check the detailed pricing here.
Running your own Redis instances on EC2 gives you more control but requires more management effort.
You can check the detailed EC2 pricing here.
In summary, while ElastiCache might seem more expensive at first glance, it provides benefits such as automated patching, backups, and high availability that could justify its price. However, if you have the expertise to manage your own Redis cluster and need tight control over its configuration, running Redis on EC2 could be the better choice.