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Top 8 Java event-streaming Projects
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Ingest real-time data from Kafka, Pulsar, or CDC sources like Postgresand MySQL, with built-in support for Debezium.
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InfluxDB
InfluxDB – Built for High-Performance Time Series Workloads. InfluxDB 3 OSS is now GA. Transform, enrich, and act on time series data directly in the database. Automate critical tasks and eliminate the need to move data externally. Download now.
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debezium
Change data capture for a variety of databases. Please log issues at https://issues.redhat.com/browse/DBZ.
Project mention: Streaming Postgres Changes with Debezium and Kafka Connect: A Hands-On Tutorial | dev.to | 2025-05-05Debezium
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git clone https://github.com/obsidiandynamics/kafdrop.git
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eventmesh
EventMesh is a new generation serverless event middleware for building distributed event-driven applications.
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Project mention: Kafbat UI – Resurrected Kafka UI from the Original Core Team | news.ycombinator.com | 2025-04-15
We brought Kafbat UI back to life — a clean, modern UI for Apache Kafka (kafka-ui), originally built by the core team that created the widely used Kafka tools you may have seen before.
Key features:
Built by the original maintainers
Instant cluster introspection and topic browsing
Zero-config local startup (Docker support included)
Actively maintained & open source
GitHub: https://github.com/kafbat/kafka-ui
We’d love your feedback and contributions — let’s build the Kafka UI we all wanted back.
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zilla
🦎 A multi-protocol edge & service proxy. Seamlessly interface web apps, IoT clients, & microservices to Apache Kafka® via declaratively defined, stateless APIs.
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SaaSHub
SaaSHub - Software Alternatives and Reviews. SaaSHub helps you find the best software and product alternatives
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pulsar-recipes
A StreamNative library containing a collection of recipes that are implemented on top of the Pulsar client to provide higher-level functionality closer to the application domain.
NOTE:
The open source projects on this list are ordered by number of github stars.
The number of mentions indicates repo mentiontions in the last 12 Months or
since we started tracking (Dec 2020).
Java event-streaming discussion
Java event-streaming related posts
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Every Database Will Support Iceberg — Here's Why
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Kafbat UI – Resurrected Kafka UI from the Original Core Team
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Show HN: Kafbat UI for Apache Kafka v1.2 is out
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Introducing Kafbat UI: Simplify Kafka Management with a Modern UI
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Show HN: Kafbat UI for Apache Kafka v1.1 is out
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Kafka-on-Pulsar Got Archived
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UI for Apache Kafka - An open-source tool for monitoring and managing Apache Kafka Clusters - v0.17 release
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A note from our sponsor - SaaSHub
www.saashub.com | 21 May 2025
Index
What are some of the best open-source event-streaming projects in Java? This list will help you:
| # | Project | Stars |
|---|---|---|
| 1 | Apache Pulsar | 14,601 |
| 2 | debezium | 11,397 |
| 3 | kafka-ui | 10,761 |
| 4 | kafdrop | 5,824 |
| 5 | eventmesh | 1,646 |
| 6 | kafka-ui | 1,072 |
| 7 | zilla | 585 |
| 8 | pulsar-recipes | 12 |
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