kdb+ vs RRDtool
| kdb+ | RRDtool | |
|---|---|---|
| Free plan | No | No |
| Free trial | No | No |
| Paid from | — | — |
| Open source | No | No |
| Platforms | Windows, macOS, Linux | Windows, Linux |
| Deployment | both | self_hosted |
| SQL support | Yes | — |
| Retention policies | Yes | Yes |
| Horizontal scaling | Yes | — |
| Query languages | q, q-SQL | — |
| Ingestion methods | tickerplant, feed handlers, batch mode, TCP/IP, Apache Kafka, Python, Java, C | command line; standard-input pipes; Perl; Python; Ruby; Lua; Tcl |
| Free plan | — | Yes |
Both are listed in Best Time-Series Databases. On Everything Xiaomi, kdb+ scores higher on our published basis.