Hazelcast is a distributed IMDG, i.e. in-memory data grid, which is used widely across industries by companies like Nissan, JPMorgan, Tmobile, to name a few.

It offers various rich features including distributed cache to store key-value pairs, constructs to create and use distributed data structure, and a way to distribute your computation and queries among nodes in a cluster.

Hazelcast is a very useful tool in developing applications that require high scalability, performance, and availability.