Varnish, Amazon ElastiCache, Apache Traffic Server, Ehcache, and Squid are the most popular tools in the category “Caching”. “High-performance” is the primary reason developers pick Varnish over its competitors, while “Redis” is the reason why Amazon ElastiCache was chosen.
Deploy, operate, and scale an in-memory cache in the cloud
RFC compliant, high performance HTTP proxy cache
A database-backed Active Support cache store implementation
The easiest, most advanced managed memcache for the cloud
A fully-managed service for hosting and running your memcached in a reliable and fail-safe manner