Geode, Hazelcast , Redis, and EhCache

Apache Geode is the oldest in-memory data grid. Indian and China Railways re-architected their legacy system to handle 36% of the world population's ticketing demands using the commercial version of Geode. But the Apache Geode APIs are ancient and lack readability; the documentation is also not easy to understand.

Hazelcast, Redis, EhCache, Infispan, and other in-memory data grids are not as feature-rich as Apache Ignite. Especially the service grid, IGFS and Hadoop MapReducec play a key role in choosing Apache Ignite. Key-value pair and SQL query performance are also faster in Apache Ignite.