KeyDB is described as 'What is KeyDB?' and is an app in the Development category. There are more than 25 alternatives to KeyDB for a variety of platforms, including Linux, Mac, Windows, Online / Web-based and BSD. The best alternative is MongoDB, which is free. Other great apps like KeyDB are Redis (Free, Open Source), Apache Cassandra (Free, Open Source), CouchDB (Free, Open Source) and RethinkDB (Free, Open Source).
BigMemory: a commercial in-memory data management suite for real-time Big Data applications that stores up to hundreds of terabytes in distributed memory across multiple servers without performance hits from the Java garbage collector.