Apache Druid vs Apache Kudu
Apache Druid
druid.apache.orgApache Kudu
kudu.apache.orgSide by side
| Figure | Apache Druid | Apache Kudu |
|---|---|---|
| Price from | Free | Free |
| Free plan | Yes | Yes |
| Free trial | — | — |
| Open source | — | — |
| Web | Yes | — |
| macOS | Yes | Yes |
| Linux | Yes | Yes |
| API | Yes | Yes |
| Self-hosted | Yes | Yes |
| Plans published | 1 | 1 |
| Spec score · Columnar Databases | 9.0 (#6) | 8.1 (#11) |
| Deployment | Druid can run on commodity hardware in *NIX environments and is designed to run in AWS, GCP, Azure, and other cloud environments. | Kudu stores data on the Linux filesystem and recommends ext4 or XFS for storage directories. |
| Integrations | Core extensions support systems and formats including S3, HDFS, Google Cloud Storage, Azure, Kafka, Kinesis, Avro, ORC, Parquet, MySQL, and PostgreSQL. | The project lists Apache Impala, Apache NiFi, Apache Spark SQL, and Presto among its frequently used integrations. |
| Notable limitation | The FAQ says Druid is not commonly used for full-text search over text logs, though it is often used to ingest and analyze semi-structured data such as JSON. | The FAQ says Kudu does not currently support automatic record deletion through a time-to-live property. |
| Purpose | Apache Druid is a high-performance real-time analytics database for sub-second queries on streaming and batch data at scale. | Apache Kudu is an open source distributed data storage engine for fast analytics on rapidly changing data. |
| Security | Security features include TLS, authentication, and authorization, but they are disabled by default and the documentation says to configure them for production. | Kudu supports Kerberos authentication, TLS for authenticated internal connections, and fine-grained authorization using Apache Ranger policies. |
| Support | The project directs users to its community network for help using Druid. | The project points users to documentation, mailing lists, and its chat room for help; training may be offered by third-party vendors. |
Plans
In their own words
Apache Druid
Apache Druid is a free, open-source analytics database for querying streaming and batch data. It is designed to return OLAP queries in milliseconds, including on high-cardinality datasets with billions to trillions of rows. The project describes applications ranging from hundreds to 100,000 queries per second. Native Apache Kafka and Amazon Kinesis integrations support low-latency ingestion and querying as data arrives. Druid organizes ingested data into columnar, time-indexed, encoded and compressed storage. Queries can use Druid SQL or JSON-over-HTTP, and joins are available during ingestion or at query time. Its web console can load data, manage datasources and tasks, show server status and run queries. Extensions connect to storage, databases and formats including S3, HDFS, Azure, PostgreSQL, Avro, ORC and Parquet. Druid can be self-hosted on Linux, macOS and other Unix-like systems; Windows is not supported. The local quickstart needs at least 6 GiB of RAM and Java 17. Production security controls require configuration.
Apache Kudu
Apache Kudu is an open-source distributed storage engine for analytics on rapidly changing data. It combines fast inserts and updates with efficient columnar scans in one storage layer. Tables use strongly typed columns and primary keys, allowing reads, updates, and deletes by key, with millisecond-scale access to individual rows. Java, C++, and Python APIs are provided, and frequently used integrations include Apache Impala, Apache NiFi, Apache Spark SQL, and Presto. Kudu runs on Linux, stores data in the Linux filesystem, and recommends ext4 or XFS for storage directories. Raft replicates tablet operations, while clients can use strict snapshot consistency. Security options include Kerberos authentication, TLS for authenticated internal connections, and fine-grained Apache Ranger authorization. It is self-hosted, supports Parquet, and is free under the Apache 2.0 license. Kudu is not designed as an OLTP system and does not currently support automatic record deletion through a time-to-live property. The listed latest release is 1.18.1, released January 9, 2026.