| Price from | Free | Free |
| Free plan | Yes | Yes |
| Free trial | — | — |
| Open source | — | — |
| Web | — | Yes |
| Windows | — | Yes |
| macOS | — | Yes |
| Linux | Yes | Yes |
| iOS | — | Yes |
| Android | — | Yes |
| API | — | Yes |
| Self-hosted | Yes | Yes |
| Plans published | 1 | 5 |
| Spec score · Data Federation Software | 7.6 (#12) | 8.4 (#4) |
| Deployment | The README documents building from source and installing to /usr/local/pgspider. | Stardog can run as a managed AWS cloud service, in customer cloud environments, or on premises through Docker, Kubernetes, AWS Marketplace, and Azure Marketplace. |
| License | The included license permits use, copying, modification, and distribution without a fee, and disclaims warranties and an obligation to provide support or updates. | Stardog Free is proprietary, licensed software and the pricing FAQ explicitly says it is not open source. |
| Purpose | PGSpider is a SQL cluster engine for distributed big data that accesses data sources through Foreign Data Wrappers. | Stardog connects enterprise data into a semantic layer for AI, analytics, search, and applications. |
