VoltDB is a blazingly fast NewSQL database system. It is specifically designed to run on modern scale-out architectures - fast, inexpensive servers connected via high-speed data networks.
Cost / License
- Free
- Open Source
Platforms
- Mac
- Windows
- Linux
Couchbase is described as 'The NoSQL database market share leader, with production deployments at AOL, Deutsche Post, NTT Docomo, Salesforce.com, Turner Broadcasting Systems, Zynga and hundreds of other organizations worldwide' and is an app in the development category. There are more than 50 alternatives to Couchbase for a variety of platforms, including Linux, Windows, Mac, Self-Hosted and Web-based apps. The best Couchbase alternative is SQLite, which is both free and Open Source. Other great apps like Couchbase are PostgreSQL, MySQL Community Edition, MongoDB and MariaDB.
VoltDB is a blazingly fast NewSQL database system. It is specifically designed to run on modern scale-out architectures - fast, inexpensive servers connected via high-speed data networks.
Clustrix is the leading scale-out SQL database engineered for the cloud. With Clustrix, you can scale transaction throughput, run real-time analytics, and simplify operations.
high-performance, integrated and distributed in-memory platform for computing and transacting on large-scale data sets in real-time.
NCache is an Open Source in-memory distributed cache for .NET, Java, and Node.js. NCache provides an extremely fast and linearly scalable distributed cache that caches application data and reduces expensive database trips.




TayzGrid is an elastic in-memory data grid with a self-healing peer to peer dynamic data grid clustering architecture. TayzGrid is extremely fast and linearly scalable data grid and provides intelligent replication for data reliability without compromising on scalability.




Skytable is a free and open-source realtime NoSQL database that aims to provide flexible data modelling at scale.

Cachelot works within a fixed amount of memory. No garbage collector. Small metadata, near perfect memory utilization (overhead is 5-7% of the total memory).
The Starcounter database is built with the real-time systems of today in mind. Real-time systems supporting thousands or millions of simultaneous users. Systems like online stores, location-based services or banking applications.
NuoDB is a distributed database that can be deployed in any datacenter, in any cloud, anywhere, without the compromises inherent in other New SQL solutions.
MarkLogic is the only Enterprise NoSQL database, bringing all the features you need into one unified system: a document-centric, schema-agnostic, structure-aware, clustered, transactional, secure, database server with built-in search and a full suite of application services.
Mimer SQL is an SQL-based relational database management system from the Swedish company Mimer Information Technology AB (formerly: Upright Database Technology AB), which has been developed and produced since the 1970s.