GridGain stands out for its speed, particularly for real-time, large-scale data processing. I have been impressed with its distributed in-memory data grid, which really speeds up any applications. The SQL support over the in-memory store has been particularly useful and the integration with the existing databases has been seamless. Review collected by and hosted on G2.com.
GridGain is a powerful tool but the learning curve is very steep since getting it set up in a more complex environment is difficult. The documentation can definitely be geared to new users better. It also takes quite a long time to configure and tune it initially, which may or may not be suited to teams with little background in distributed systems. Review collected by and hosted on G2.com.