A single-binary streaming SQL engine built on ClickHouse for stream processing, real-time analytics and pipelines over Kafka and other sources.
2.3K+2 this week112C++Apache-2.0Well maintainedUpdated 9 days ago
1 alternative
Best open-source alternatives to ksqlDB (2026)
Looking for a free, open-source alternative to ksqlDB? These 1 projects can replace it. Each one passed our quality screening and is explained in plain words, so you can compare stars, license and maintenance at a glance.
Quick comparison
| Project | Stars | License | Last commit |
|---|---|---|---|
| timeplus-io/proton | ★ 2.3K | Apache-2.0 | 9 days ago |
FAQ
- Is there a free, open-source alternative to ksqlDB?
- Yes. The most popular open-source alternatives to ksqlDB on Repolode are proton.
- Which ksqlDB alternative should I choose?
- proton has the most GitHub stars and is released under Apache-2.0. Compare the license and last commit of each option in the table above before choosing.
How this list is made: AI reads each project's documentation to match it with products it can replace, every project passes our quality screening, and the list is ranked by GitHub stars. Stars updated Nov 7, 2026. How Repolode works