1. UniData，UniVerse：
它是具有SQL映射层和元数据库功能的MultiValue数据库和应用程序服务器。 UniData简化了数据库设计，消除了SQL规范化的约束。 UniVerse是MultiValue应用程序平台的组件，其优点是用于开发企业应用程序的快速，灵活的数据服务器。基于UniVerse的应用程序可最大化可用资源的处理吞吐量，动态分配可用资源。
2. VelocityDB：
它是一个.NET对象数据库，可以嵌入/分发并扩展为图形数据模型(VelocityGraph)。该数据库速度快且内存消耗低。 VelocityDB是一个极高性能，易于使用，可伸缩，可嵌入和可分发的对象数据库系统。
UniData，UniVerse和VelocityDB之间的区别：
| S.NO. | UniData, UniVerse | VelocityDB |
|---|---|---|
| 1 | Developed by Rocket Software and initially released on 1985. | Developed by VelocityDB Inc and initially released on 2011 Current release of VelocityDB is 7.x. |
| 2 | Server operating systems of UniData, UniVerse is AIX, HP-UX, Linux, Solaris, Windows. | .NET is the Server operating system. |
| 3 | Primary database model is Multivalue DBMS. | Primary database model is Graph DBMS and Object oriented DBMS. |
| 4 | UniData, UniVerse supports .Net, Basic, C, Java, programming languages. | Supports .Net programming languages. |
| 5 | APIs and other access methods of UniData, UniVerse is Proprietary protocol, RESTful HTTP API, Java API, JDBC, ODBC, OLE DB, SOAP-based API. | APIs and other access methods of VelocityDB is .Net |
| 6 | UniData, UniVerse has a schema-free Data Schema. | It also has a Data Schema. |
| 7 | It has Implementation language C . | It has Implementation language-C# |
| 8 | ACID (atomicity, consistency, isolation, durability) Transaction concepts in UniData, UniVerse. | Transaction concepts of VelocityDB is ACID ( Atomicity, Consistency, Isolation, and Durability). |
| 9 | Replication methods of UniData, UniVerse is Master-slave replication. | Absence of Replication methods. |
| 10 | UniData, UniVerse doesn’t hold Consistency concept. | VelocityDB has Immediate Consistency concept. |
| 11 | Absence of Partitioning methods in UniData, UniVerse. | Sharding is a Partitioning methods of VelocityDB. |