This is a comparison of object–relational database management systems (ORDBMSs). Each system has at least some features of an object–relational database; they vary widely in their completeness and the approaches taken.
The following tables compare general and technical information; please see the individual products' articles for further information. Unless otherwise specified in footnotes, comparisons are based on the stable versions without any add-ons, extensions or external programs.
| Name | Vendor | License | OS | Notes | |
|---|---|---|---|---|---|
| Adaptive Server Enterprise | SAP | Proprietary | Cross-platform | ||
| Caché | InterSystems | Proprietary | Cross-platform | ||
| CUBRID | NHN Corporation | GPL/BSD | Linux, Windows | ||
| IBM Db2 | IBM | Proprietary | Cross-platform | ||
| GigaSpaces | GigaSpaces | Apache-2.0 or Proprietary | Cross-platform | ||
| Greenplum Database | Greenplum division of EMC Corporation | Proprietary | ? | Uses PostgreSQL codebase | |
| Informix | IBM | Proprietary | Cross-platform | ||
| Microsoft SQL Server | Microsoft Corporation | Proprietary | Windows, Linux | Supports data objects in .NET languages | |
| OpenEdge Advanced Business Language (formerly Progress 4GL) | Progress Software Corporation | Proprietary | Cross-platform | ||
| Oracle Database | Oracle Corporation | Proprietary | Linux, Windows, Unix | ||
| PostgreSQL | PostgreSQL Global Development Group | PostgreSQL License | Cross-platform | ||
| Virtuoso Universal Server | OpenLink Software | GPLv2 or proprietary | Cross-platform | ||
| VMDS (Version Managed Data Store) | GE Energy, a division of General Electric | Proprietary | ? | GIS for public utilities; can be stored inside Oracle Database | |
| WakandaDB | 4th Dimension | AGPLv3 or proprietary | Windows, Linux, macOS | Based on REST and server-side JavaScript | |
| XDB Enterprise Server | Micro Focus | Proprietary | DOS, Windows NT, OS/2 | ||
| YugabyteDB | Yugabyte | Apache 2.0 | Linux | ||
| Zope Object Database | Zope Corporation | Zope Public License | Cross-platform | For Python, also included in Zope web application server |
Information about what fundamental ORDBMSes features are implemented natively.
Information about what data types are implemented natively.