List of in-memory databases
This article is a list of in-memory database system software.
| Name | Developer | Availability | Client Interface | License | Description/Notes |
| Aerospike DBS | Aerospike Company | 2012 | Java, C#, C, Python, Go, Node.js, Perl, libevent, PHP, Ruby, Rust | Open Source | Flash-optimized in-memory open source NoSQL database. |
| ALTIBASE HDB | Altibase Corporation | 1999 | Java, C, C++, JDBC, ODBC, SQL | Open source | "Hybrid DBMS" that combines an in-memory database with a conventional disk-resident database in a single unified engine. Supports full ACID properties, standard connectivity interfaces such as JDBC and ODBC as well as interoperability. |
| ALTIBASE XDB | Altibase Corporation | 1999 | Java, C, C++, JDBC, ODBC, SQL | Open source | General purpose database that has high data processing speeds in main-memory alone. It comes with high-availability, replication and scalability features; three interfaces as well as conventional client/server protocols such as TCP/IP and IPC for more complex database operations. Supports full ACID properties, standard connectivity interfaces such as JDBC and ODBC as well as interoperability. |
| Ancelus | Time Compression Strategies | Proprietary | Ancelus is an ACID compliant database with extreme performance characteristics. It replaces pre-defined storage structures with an algorithmic process that delivers constant performance at any size or complexity. | ||
| Apache Ignite | Apache Software Foundation, GridGain Systems | 2014 | Java, SQL, JDBC, ODBC | Open Source | Apache Ignite is an in-memory computing platform that is durable, strongly consistent, and highly available with powerful SQL, key-value and processing APIs. With full SQL support, one of the main use cases for Apache Ignite is the in-memory database which scales horizontally and provides ACID transactions. |
| Apache Geode | Apache Software Foundation | 2015 | Java, C, C++,.NET, Node.js, JDBC, ODBC | Open Source | Apache Geode is a data management platform that provides real-time, consistent access to data-intensive applications throughout widely distributed cloud architectures. Apache Geode pools memory, CPU, network resources, and optionally local disk across multiple processes to manage application objects and behavior. It uses dynamic replication and data partitioning techniques to implement high availability, improved performance, scalability, and fault tolerance. In addition to being a distributed data container, Apache Geode is an in-memory data management system that provides reliable asynchronous event notifications and guaranteed message delivery. |
| ArangoDB | ArangoDB GmbH | 2011 | AQL, HTTP, Java, JavaScript, PHP, Go, Scala,.Net, Python, Ruby | Open Source | ArangoDB is a transactional native multi-model database supporting two major NoSQL data models with one query language. Written in C++ and optimized for in-memory computing. In addition ArangoDB integrated RocksDB for persistent storage. ArangoDB supports Java, JavaScript, Python, PHP, NodeJS, C++ and Elixir. For resilient cluster behavior, ArangoDB offers a Raft-based cluster management. |
| Datablitz | Bell Labs | 1997 | Proprietary | Dali prototype was a research project at Bell Labs. It was commercialized and used by Lucent as database for in premier wireline and wireless products. | |
| Ehcache | Terracotta, Inc. | 2006 | Java | Open source | For Java, distributed |
| eXtremeDB | McObject | 2001 | SQL, Lua, C, C++, C#, Java, Python | Proprietary | Cross-platform, including Linux, Windows, RTOS and server platforms. Interfaces include type-safe, native C/C++; native Java &.NET; SQL/ODBC/JDBC. Specialized editions for clustering, high availability, 64-bit support, and hybrid storage. eXtremeDB Financial Edition implements columnar data handling, vector-based statistical function library, integrated performance monitoring. |
| H2 | H2 | Java, ODBC, JDBC | Open Source | For Java | |
| HSQLDB | HSQL Development Group | Java, SQL, ODBC | Open Source | Relational, for Java | |
| Hazelcast | Hazelcast Team | Java, C#, C++, Node.js, Python, Go | Open Source | For Java, NoSQL, distributed | |
| Informix Warehouse Accelerator | IBM | JDBC, SQL | Proprietary | IWA supports Dynamic In-memory Parallel Vector Processing, Actionable Compression, and Data Skipping technologies, collectively called "Blink Technology" by IBM. The Informix Advanced Enterprise and Advanced Workgroup Editions include IWA. Released: March 2011. | |
| InfinityDB | Boiler Bay Inc. | 2002 | Java, HTTP, | Proprietary | Java extended standard ConcurrentNavigableMap NoSQL with caching, durability, transactions, compression. |
| Kinetica | Kinetica | 2014 | C++, C#, Java, JavaScript, Node.js. Python, HTTP | Proprietary | GPU-accelerated, in-memory, distributed database for analytics. Functions like a RDBMS for fast analytics on datasets in the hundreds of GBs to 10's of TBs range. Interact with SQL and REST API. Geospatial objects and functions. UDF framework allows for custom code and machine learning workloads to run in-database. Received $50mil Series A funding in June 2017. |
| Memcached | Danga Interactive | 2003 | Proprietary text and binary protocols in any language | Open Source | Hashtable with LRU purge |
| MemSQL | MemSQL, Inc. | Proprietary | SQL relational | ||
| SQLite | SQLite | Open Source | SQL database that supports in-memory storage with the :memory: connection string. | ||
| Microsoft COM+ IMDB | Microsoft Corporation | Proprietary | Defunct | ||
| Microsoft SQL Server | Microsoft | 2012 | Proprietary | In SQL Server 2014, a feature codenamed Hekaton, and named In Memory OLTP, provided limited memory optimization, which can be used in conjunction with natively compile stored procedures which are persisted as C. In SQL Server 2012, an in-memory technology called xVelocity column-store indexes targeted for data-warehouse workloads. | |
| Mnesia | Ericsson | 2014 | Open Source Erlang Licence | Mnesia is a distributed, soft real-time database management system written in the Erlang programming language. It is distributed as part of the Open Telecom Platform. | |
| MonetDB | CWI | 2004 | Open Source | Column-store RDBMS with an SQL top-level interface and ODBC, JDBC drivers | |
| MySQL NDB Cluster | MySQL | 1997 | Dual_license open source and optional proprietary | Highly available distributed real-time in-memory NoSQL database. Often used with MySQL for SQL cross-shard parallel query processing. | |
| OmniSci | OmniSci | 2013 | Open Source | GPU-accelerated, SQL database and visualization platform for real-time analytics. Product consists of the core database plus a BI visualization tool. Received $55mil Series C funding in Aug 2018. v4.8 announced in August 2019 with support for JupyterLab. | |
| Oracle RDBMS | Oracle Corporation | 2014 | Proprietary | RDBMS Oracle 12c contains an option for in-memory technology. | |
| Oracle Coherence | Oracle Corporation | Proprietary with developer download | For Java, relational, distributed | ||
| Perst | McObject | 2006 | Java, Android,.NET | open source and optional proprietary | Object-oriented embedded database system for Java, Android and.NET platforms. No ORM. Schema evolution, XML export/import, replication, specialized indexes, including full text, b-tree, t-tree, r-tree, patricia trie, kd-tree and time series |
| Polyhedra | ENEA AB | 1993 | Proprietary, with a free-to-use edition | Relational in-memory database system originally developed for use in SCADA and embedded systems, but used in a variety of other applications including financial systems. Supports data durability via snapshots and journal logging, and high availability via a hot-standby. First released in 1993; version 8.7 released in March 2013. Polyhedra Lite appeared with a free-to-use license in 2012. | |
| Raima | Raima Database Manager | 1982 | Proprietary | Raima Database Manager is an In-memory database management system used by application developers. It is a linkable library of functions that becomes a part of the application program. It has multiple interfaces available to C, C++, C#, or Java programmers. RDM supports ODBC, JDBC, SQL and SQL PL in RDM 14.0. RDM 14.0 was released in 2016. | |
| Redis | Redis Labs | 2009 | C, C++, Python, Lua, C#, etc. | Open Source | Redis is an open-source software project that implements data structure servers. It is networked, in-memory, and stores keys with optional durability. |
| SafePeak | SafePeak Technologies | Proprietary | Automated In-Memory Dynamic Caching for SQL Server OLTP applications and databases. Code-free, Dynamic Caching, Relational | ||
| SAP HANA | SAP SE | 2012 | Proprietary | SAP HANA, short for 'High Performance Analytic Appliance' is an in-memory, column-oriented, relational database management system written in C, C++ | |
| solidDB | Unicom Global | 1992 | Proprietary | Relational with standard SQL support. ODBC and JDBC interfaces. Includes in-memory and on-disk tables in the same engine. Supports high availability. | |
| SQL CE | Microsoft Corporation | Free | Compact relational embedded database produced by Microsoft for applications that run on mobile devices and desktops. ADO.NET, OLE DB. No ODBC driver. | ||
| Tarantool | Mail.ru Group | 2010 | Open Source | In-memory database and application server | |
| TerminusDB | TerminusDB | 2019 | JavaScript, Python, Prolog, Rust, JSON-LD | Open Source | Open source in-memory graph database designed for knowledge graph representation |
| TimesTen | now Oracle Corporation | 1997 | Java, JDBC, ODBC, SQL, PLSQL, C | Proprietary | Standalone database or in-memory cache for Oracle Database |
| TPF | IBM | 1979 | Marketed | Generalized extension of IBM Airlines reservation system. IBM's DB/DC system backed up the in-memory transaction processing computer. | |
| Starcounter | Starcounter AB | 2014 | Proprietary | In-memory database engine combined with an application server that melds the Virtual Machine and the Database Management System. | |
| VoltDB | VoltDB Inc. | Open Source / Proprietary | Relational; implements H-Store design | ||
| Xeround | Xeround Inc. | Proprietary / Not for sale, service only | Cloud database, defunct as of 2014 |