Esper vs Siddhi
| Esper | Siddhi | |
|---|---|---|
| Free plan | Yes | No |
| Free trial | No | No |
| Paid from | Free | — |
| Open source | No | No |
| Platforms | api, Linux, self-hosted, Windows | api, Linux, macOS, self-hosted, Windows |
| Free plan | Yes | — |
| Deployment model | self-hosted | self-hosted |
| SQL processing | Yes | Yes |
| Stateful processing | Yes | Yes |
| Event-time windows | Yes | Yes |
| Supported languages | Java, C# | Siddhi Streaming SQL, Java, Python, JavaScript |
| Source connectors | — | 16 |
Both are listed in Best Stream Processing Software. On Freedom251, Esper scores higher on our published basis.