Q: What exactly is ksqlDB?

A: ksqlDB is a database management system specifically built on top of Apache Kafka. It is designed to process data streams using a SQL-like interface.

Q: Who develops and maintains ksqlDB?

A: ksqlDB is developed by Confluent Inc. The software is open-source, with its code available on GitHub.

Q: Is ksqlDB free to use?

A: Yes, ksqlDB is classified as free software. This means users are free to run, study, change, and distribute it and any modified versions.

Q: When was the "5.0.0" version of ksqlDB released?

A: The 5.0.0 version, listed as a preferred release, was published on July 31, 2018.

ksqlDB

database built on Apache Kafka

CreativeWork free_software Q107291842

Facts

9 properties

Instance of: free software, database management system^[2]
Official website: ksqldb.io^[7]
Website: ksqldb.io
Copyright status: copyrighted^[9]
Developer: Confluent Inc.^[3]
Software version identifier: 0.3, 0.4, 5.0.0^[4]^[5]^[6]
Twitter: ksqlDB
Uses: Apache Kafka^[8]
Version: 0.3, 0.4, 5.0.0

🏷️ Also known as

en ksqlDB

🔖 Identifiers · 2

Source code repository URL: github.com
X (Twitter) username: ksqlDB (2019–present)

Report an error or request removal Lineage (PROV-JSON)

🔗 Connections

Instance of 2

free software, database management system

Uses 1

Apache Kafka

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Summary

ksqlDB is a free software^[1].

References

Programmatic citations — every numbered marker resolves to a verifiable graph row below.

Direct Wikidata claims

[2] ↑ ksqlDB — instance of (P31): database management system. wikidata.org.
[3] ↑ ksqlDB — developer (P178): Confluent Inc.. wikidata.org.
[4] ↑ ksqlDB — software version identifier (P348): 0.3. github.com. Retrieved 2021-06-20. github.com. Provenance: wikidata.org.
[5] ↑ ksqlDB — software version identifier (P348): 0.4. github.com. Retrieved 2021-06-20. github.com. Provenance: wikidata.org.
[6] ↑ ksqlDB — software version identifier (P348): 5.0.0. github.com. Retrieved 2021-06-20. github.com. Provenance: wikidata.org.
[7] ↑ ksqlDB — official website (P856): https://ksqldb.io/. wikidata.org.
[8] ↑ ksqlDB — uses (P2283): Apache Kafka. wikidata.org.
[9] ↑ ksqlDB — copyright status (P6216): copyrighted. wikidata.org.

Class ancestry

[1] ↑ ksqlDB is an instance of free software (Q341) [P31, primary]. Wikidata. wikidata.org.

📑 Cite this page

Use these citations when quoting this entity in research, articles, AI prompts, or wherever provenance matters. We aggregate Wikidata + Wikipedia + authoritative open-data sources; the stitched, scored, cross-referenced view is what 4ort.xyz contributes.

APA 4ort.xyz Knowledge Graph. (2026). ksqlDB. Retrieved May 3, 2026, from https://4ort.xyz/entity/ksqldb

MLA “ksqlDB.” 4ort.xyz Knowledge Graph, 4ort.xyz, 3 May. 2026, https://4ort.xyz/entity/ksqldb.

BibTeX

@misc{4ortxyz_ksqldb_2026, author = {{4ort.xyz Knowledge Graph}}, title = {{ksqlDB}}, year = {2026}, url = {https://4ort.xyz/entity/ksqldb}, note = {Accessed: 2026-05-03}}

LLM prompt

According to 4ort.xyz Knowledge Graph (aggregator of Wikidata, Wikipedia, and authoritative open-data sources): ksqlDB — https://4ort.xyz/entity/ksqldb (retrieved 2026-05-03)

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