Java Messaging

Open-source Java projects categorized as Messaging

Top 23 Java Messaging Projects

  • Apache Kafka

    Mirror of Apache Kafka

    Project mention: On Implementation of Distributed Protocols | | 2024-04-05

    Apache Kafka — a distributed event streaming platform implementing a variant of the Raft consensus protocol (written in Java, integrated with Scala);

  • Apache RocketMQ

    Apache RocketMQ is a cloud native messaging and streaming platform, making it simple to build event-driven applications.

    Project mention: Critical Analysis: Unraveling the Apache RocketMQ Remote Code Execution Vulnerability (CVE-2023-33246) | | 2023-07-29
  • WorkOS

    The modern identity platform for B2B SaaS. The APIs are flexible and easy-to-use, supporting authentication, user identity, and complex enterprise features like SSO and SCIM provisioning.

  • Apache Pulsar

    Apache Pulsar - distributed pub-sub messaging system

    Project mention: Choosing Between a Streaming Database and a Stream Processing Framework in Python | | 2024-02-10

    Stream-processing platforms such as Apache Kafka, Apache Pulsar, or Redpanda are specifically engineered to foster event-driven communication in a distributed system and they can be a great choice for developing loosely coupled applications. Stream processing platforms analyze data in motion, offering near-zero latency advantages. For example, consider an alert system for monitoring factory equipment. If a machine's temperature exceeds a certain threshold, a streaming platform can instantly trigger an alert and engineers do timely maintenance.

  • Aeron

    Efficient reliable UDP unicast, UDP multicast, and IPC message transport

    Project mention: LMAX Disruptor – High Performance Inter-Thread Messaging Library | | 2023-11-17

    Semi-related is the Aeron project:

  • Apache Camel

    Apache Camel is an open source integration framework that empowers you to quickly and easily integrate various systems consuming or producing data.

    Project mention: Show HN: Winglang – a new Cloud-Oriented programming language | | 2023-12-06
  • strimzi-kafka-operator

    Apache Kafka® running on Kubernetes

    Project mention: Knative switchboard series, part 1. Setup Knative Eventing with Kafka from scratch, scale based on events volume, and monitor | | 2024-01-04

    Knative dashboards together with Kafka's dashboards it sheds light on almost any aspect of what's going on in the system.

  • ChatKit for Android

    Android library. Flexible components for chat UI implementation with flexible possibilities for styling, customizing and data management. Made by Stfalcon

  • InfluxDB

    Power Real-Time Data Analytics at Scale. Get real-time insights from all types of time series data with InfluxDB. Ingest, query, and analyze billions of data points in real-time with unbounded cardinality.

  • signal-cli

    signal-cli provides an unofficial commandline, JSON-RPC and dbus interface for the Signal messenger.

    Project mention: How Beeper Mini Works | | 2023-12-05

    Not official but this works darn well:

  • Smack

    A modular and portable open source XMPP client library written in Java for Android and Java (SE) VMs

  • JeroMQ

    Pure Java ZeroMQ

  • Apache ActiveMQ

    Mirror of Apache ActiveMQ

  • RabbitMQ Java client

    RabbitMQ Java client

  • automq

    A cloud native implementation for Apache Kafka, reducing your cloud infrastructure bill by up to 90%.

    Project mention: Show HN: AutoMQ – A Cost-Effective Kafka distro that can autoscale in seconds | | 2024-04-07

    Yes, thank you for the clarification. AutoMQ has replaced the topic-partition storage with cloud-native S3Stream ( library, thereby harnessing the benefits of cloud EBS and S3.

  • hivemq-community-edition

    HiveMQ CE is a Java-based open source MQTT broker that fully supports MQTT 3.x and MQTT 5. It is the foundation of the HiveMQ Enterprise Connectivity and Messaging Platform

    Project mention: Broker times client out while broker is sending client large message. | /r/MQTT | 2023-12-08

    It is developed and supported by HiveMQ, so if you observe any issue you can contact the developers directly.

  • Nakadi

    A distributed event bus that implements a RESTful API abstraction on top of Kafka-like queues

  • MBassador

    Powerful event-bus optimized for high throughput in multi-threaded applications. Features: Sync and Async event publication, weak/strong references, event filtering, annotation driven

  • Apache ActiveMQ Artemis

    Mirror of Apache ActiveMQ Artemis

  • Hermes

    Fast and reliable message broker built on top of Kafka. (by allegro)

  • threema-android

    Threema App for Android.

  • countly-sdk-android

    Countly Product Analytics Android SDK

  • parallel-consumer

    Parallel Apache Kafka client wrapper with per message ACK, client side queueing, a simpler consumer/producer API with key concurrency and extendable non-blocking IO processing.

  • NATS client

    Java client for NATS

  • Citrus

    Framework for automated integration tests with focus on messaging integration

  • SaaSHub

    SaaSHub - Software Alternatives and Reviews. SaaSHub helps you find the best software and product alternatives

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). The latest post mention was on 2024-04-07.

Java Messaging related posts


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

Project Stars
1 Apache Kafka 27,218
2 Apache RocketMQ 20,495
3 Apache Pulsar 13,706
4 Aeron 7,039
5 Apache Camel 5,296
6 strimzi-kafka-operator 4,432
7 ChatKit for Android 3,653
8 signal-cli 2,962
9 Smack 2,366
10 JeroMQ 2,318
11 Apache ActiveMQ 2,249
12 RabbitMQ Java client 1,219
13 automq 1,129
14 hivemq-community-edition 1,024
15 Nakadi 947
16 MBassador 942
17 Apache ActiveMQ Artemis 911
18 Hermes 787
19 threema-android 786
20 countly-sdk-android 672
21 parallel-consumer 646
22 NATS client 533
23 Citrus 440
SaaSHub - Software Alternatives and Reviews
SaaSHub helps you find the best software and product alternatives