Polars vs Rocky
| Polars | Rocky | |
|---|---|---|
| Free plan | Yes | No |
| Free trial | Yes | No |
| Paid from | Free | — |
| Open source | No | No |
| Platforms | api, Linux, macOS, self-hosted, Web, Windows | Linux, macOS, Windows |
| Free plan | Yes | Yes |
| Deployment model | hybrid | self_hosted |
| Transformation interface | code | sql |
| Supported data formats | CSV, JSON, Parquet, Delta Lake, Avro, Excel, Feather, Arrow IPC | SQL; TOML; warehouse tables including Delta and Iceberg (adapter support varies) |
| Workflow orchestration | Yes | Yes |
| Version control | — | Yes |
| Data quality checks | — | Yes |
Both are listed in Best Data Transformation Tools. On The Geeks Club, Polars scores higher on our published basis.