KSQL for Kafka
Open Source Streaming SQL for Apache Kafka
KSQL for Kafka launched on August 28, 2017 with 2 votes. The site was still online in September 2026, 9 years on.
What it does
Note ksqlDB is the successor to KSQL. Read the announcement to learn more. To get started with ksqlDB in Confluent Cloud, you can sign up for fully managed Apache Kafka […]
I’m really excited to announce KSQL, a streaming SQL engine for Apache Kafka ® . KSQL lowers the entry bar to the world of stream processing, providing a simple and completely interactive SQL interface for processing data in Kafka. You no longer need to write code in a programming language such as Java or Python! KSQL is distributed, scalable, reliable, and real time. It supports a wide range of powerful stream processing operations including aggregations, joins, windowing, sessionization, and much more. Well, it’s actually quite different to a SQL database. Most databases are used for doing on-demand lookups and modifications to stored data. KSQL doesn’t do lookups (yet), what it does do…from confluent.io
Does a similar job
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UI for Apache Kafka2021 · github.com · ▲158Open-Source Web UI for Apache Kafka Management. Contribute to provectus/kafka-ui development by creating an account on GitHub.




DuckDB for Kafka Stream ProcessingDec 2025 · sql-flow.com · ▲77Hello Everyone! We built SQLFlow as a lightweight stream processing engine. We leverage DuckDB as the stream processing engine, which gives SQLFlow the ability to process 10's of thousands of messages a second using ~250MiB of memory! DuckDB also supports a rich ecosystem of sinks and connectors! https://sql-flow.com/docs/category/tutorials/ https://github.com/turbolytics/sql-flow We were tired of running JVM's for simple stream processing, and also of bespoke one off stream processors I would love your feedback, criticisms and/or…
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