Hazelcast is the leading open source In-Memory Data Grid.
It gives software elastic In-Memory performance with elastic scale, all on top of commodity hardware and open source, thus delivering optimal price performance from zero to billions of transactions.
Developers can download a small (~2.6MB) Java JAR file distributed under the Apache 2 license and embed it in their application with no dependencies other than Java. Under the hood, Hazelcast provides distributed data structures and distributed processing utilities in which Hazelcast nodes automatically discover one another and elastically scale.
We sell to top investment banks, telcos, logistics, gaming and gambling, startups, health care, system integrators, governments and major Enterprises looking to gain In-Memory performance without expensive proprietary hardware and software.