DolphinDB vs kdb+
| DolphinDB | kdb+ | |
|---|---|---|
| Free plan | Yes | No |
| Free trial | Yes | No |
| Paid from | Free | — |
| Open source | No | No |
| Platforms | api, extension, Linux, self-hosted, Web, Windows | Windows, macOS, Linux |
| Free plan | Yes | — |
| Deployment | both | both |
| SQL support | Yes | Yes |
| Retention policies | Yes | Yes |
| Horizontal scaling | Yes | Yes |
| Query languages | DolphinDB SQL; ANSI SQL/SQL-92; DolphinDB scripting language | q, q-SQL |
| Ingestion methods | Text, binary, JSON, HDF5, Parquet, Arrow, ODBC, APIs, Kafka, MQTT, ZeroMQ, MySQL, MongoDB, HBase, kdb+ | tickerplant, feed handlers, batch mode, TCP/IP, Apache Kafka, Python, Java, C |
Both are listed in Best Time-Series Databases, Best OLAP Software. On Freedom251, DolphinDB scores higher on our published basis.