The best In-memory Database alternative to Microsoft SQL Server is SQLite, which is both free and Open Source. If that doesn't suit you, our users have ranked more than 50 alternatives to Microsoft SQL Server and three of them are In-memory Databases so hopefully you can find a suitable replacement. Other interesting In-memory Database alternatives to Microsoft SQL Server are SAP HANA and Oracle TimesTen.
SQLite is a software library that implements a self-contained, serverless, zero-configuration, transactional SQL database engine. SQLite is the most widely deployed SQL database engine in the world. The source code for SQLite is in the public domain.
SAP HANA is a completely re-imagined platform for real-time business.
It transforms business by streamlining transactions, analytics, planning, predictive, sentiment data processing on a single in-memory database so business can operate in real-time.
TimesTen is a memory-optimized, relational database management system with persistence and recoverability. Originally designed and implemented at Hewlett-Packard labs in Palo Alto, California, TimesTen was spun out into a separate startup in 1996 and acquired by Oracle...
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