In the The Forrester WaveTM: In-Memory Databases, Q1 2017 report, Oracle TimesTen In-Memory Database and Oracle In-Memory were rated the top In-Memory Databases:
The report states:
"Oracle offers Oracle TimesTen In-Memory Database and Oracle Database In-Memory products. With the combination of these two options, customers can deploy any type of application -- transactional, operational, and analytical."
"Oracle customers building new transactional or analytical applications should look at TimesTen, and existing Oracle databases would benefit by upgrading to the in-memory option in Oracle Database."
Forrester evaluated thirteen In-Memory databases based on 24 criteria and considered the current offerings, strategy and market presence.
The DBMS vendors in the Leaders category were:
The DBMS vendors in the Strong Performers category were:
The DBMS vendors in the Contenders category were:
Disclaimer: these are my personal thoughts and do not represent Oracle's official viewpoint in any way, shape, or form.