What are the best In-Memory Databases Tools?

Redis, Hazelcast, Aerospike, VoltDB, and SAP HANA are the most popular tools in the category “In-Memory Databases”. “Performance” is the primary reason developers pick Redis over its competitors, while “Distributed Locking” is the reason why Hazelcast was chosen.

Redis
Hazelcast
Aerospike
VoltDB
SAP HANA
Beringei
NCache
KeyDB
Apache Ignite
Azure Redis Cache