Java event-streaming

Open-source Java projects categorized as event-streaming
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Top 8 Java event-streaming Projects

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  1. Apache Pulsar

    Apache Pulsar - distributed pub-sub messaging system

    Project mention: Top Open-Source Data Engineering Tools- Unravelling the Best in 2026 | dev.to | 2025-12-10

    Pulsar

  2. AppSignal

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  3. debezium

    Change data capture for a variety of databases. Please log issues at https://github.com/debezium/dbz/issues.

    Project mention: 7 Free Tools for Data Pipeline Reconciliation and Cross-Source Validation | dev.to | 2026-05-13

    Debezium is an open-source CDC (change data capture) platform that streams database changes - inserts, updates, deletes - from supported databases (PostgreSQL, MySQL, MongoDB, SQL Server) to downstream consumers via Apache Kafka.

  4. kafka-ui

    Open-Source Web UI for Apache Kafka Management

  5. kafdrop

    Kafka Web UI

  6. eventmesh

    EventMesh is a new generation serverless event middleware for building distributed event-driven applications.

  7. zilla

    🦎 A lightweight, multi-protocol gateway for event-driven applications and AI agents. Expose and govern Kafka, MQTT, APIs, and MCP through one high-performance engine with shared routing, security, schema, and observability.

  8. 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.

  9. SaaSHub

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  10. kafka-schema-registry-spring-demo

    Kafka Schema Registry Spring Boot demo with Avro producer/consumer and PostgreSQL persistence

    Project mention: Building a Kafka Event-Driven Spring Boot Application with Avro, Schema Registry and PostgreSQL | dev.to | 2026-01-04

    👉 Full source code: 🔗 https://github.com/mathias82/kafka-schema-registry-spring-demo

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).

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Java event-streaming related posts

  • 7 Free Tools for Data Pipeline Reconciliation and Cross-Source Validation

    4 projects | dev.to | 13 May 2026

  • Every Database Will Support Iceberg — Here's Why

    10 projects | dev.to | 22 Apr 2025

  • Kafbat UI – Resurrected Kafka UI from the Original Core Team

    1 project | news.ycombinator.com | 15 Apr 2025

  • Show HN: Kafbat UI for Apache Kafka v1.2 is out

    1 project | news.ycombinator.com | 21 Mar 2025

  • Introducing Kafbat UI: Simplify Kafka Management with a Modern UI

    1 project | dev.to | 17 Jan 2025

  • Show HN: Kafbat UI for Apache Kafka v1.1 is out

    1 project | news.ycombinator.com | 13 Jan 2025

  • Kafka-on-Pulsar Got Archived

    1 project | news.ycombinator.com | 24 Jan 2024
  • A note from our sponsor - AppSignal
    www.appsignal.com | 7 Oct 2026
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Index

What are some of the best open-source event-streaming projects in Java? This list will help you:

# Project Stars
1 Apache Pulsar 15,340
2 debezium 13,175
3 kafka-ui 12,242
4 kafdrop 6,157
5 eventmesh 1,756
6 zilla 1,716
7 pulsar-recipes 12
8 kafka-schema-registry-spring-demo 12

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