Apache Kafka vs Timely Dataflow
| Apache Kafka | Timely Dataflow | |
|---|---|---|
| Free plan | No | No |
| Free trial | No | No |
| Paid from | — | — |
| Open source | No | No |
| Platforms | — | self-hosted |
| Free plan | Yes | — |
| Deployment model | self-hosted | self-hosted |
| SQL processing | No | — |
| Stateful processing | Yes | Yes |
| Event-time windows | Yes | — |
| Supported languages | Java, Scala | Rust |
Both are listed in Best Stream Processing Software. On Freedom251, Timely Dataflow scores higher on our published basis.