1. UniData，UniVerse：
它是一个具有 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 应用平台的一个组件，它的优势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 的应用程序最大化可用资源的处理吞吐量，动态分配可用资源。
2.速度数据库：
它是一个 .NET 对象数据库，可以嵌入/分布式并扩展到图形数据模型 (VelocityGraph) 数据库速度快且内存消耗低。 VelocityDB 是一个性能极高、易于使用、可扩展、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. |