# Java WebSocket Libraries

> AI-ranked search results for `best java websocket libraries` on awesome-repositories.com — ordered by an LLM for relevance, best match first. 110 total matches; showing the top 7.

Explore on the web: https://awesome-repositories.com/q/best-java-websocket-libraries

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## Results

- [eclipse-vertx/vert.x](https://awesome-repositories.com/repository/eclipse-vertx-vert-x.md) (14,667 ⭐) — Vert.x is a reactive polyglot framework and asynchronous programming library for the Java Virtual Machine. It functions as an event-driven networking framework and toolkit for building non-blocking applications.

The system enables the development of high-concurrency network services and event-driven microservices. It supports the creation of reactive services using multiple languages running on the JVM.

The framework covers a wide range of capabilities including the management of HTTP and TCP network protocols, non-blocking file system access, and the integration of reactive clients.
- [tootallnate/java-websocket](https://awesome-repositories.com/repository/tootallnate-java-websocket.md) (10,811 ⭐) — Java-WebSocket is a collection of classes for implementing WebSocket clients and servers using pure Java. It provides a framework for hosting servers that manage connections via event-driven subclasses and tools for establishing client connections to remote servers.

The library includes a secure communication tool for encrypting traffic using the WSS protocol and a compression library that uses per-message deflate extensions to reduce transmitted data size. It supports the configuration of cipher suites to limit encryption protocols and ensure compatible communication.

The project enables bi
- [apache/tomcat](https://awesome-repositories.com/repository/apache-tomcat.md) (8,186 ⭐) — Apache Tomcat is an open-source implementation of the Jakarta Servlet, Pages, Expression Language, and WebSocket specifications, serving as a container for running Java web applications. It provides a modular architecture with a servlet container, connector abstraction for multiple I/O models, and a pipeline-based request processing system that handles cross-cutting concerns through composable components.

The server supports container-managed security with configurable realms for authentication against JDBC, LDAP, or memory-based credential stores, and offers TLS encryption with optional Open
- [netty/netty](https://awesome-repositories.com/repository/netty-netty.md) (34,975 ⭐) — Netty is an asynchronous network framework designed for building scalable protocol servers and clients. It utilizes an event-driven reactor pattern and a non-blocking input/output model to decouple connection handling from application logic, allowing for the development of responsive network services that manage high volumes of concurrent connections.

The framework distinguishes itself through a modular pipeline-based processing chain that enables the implementation of custom binary or text-based protocols. It provides a pluggable transport abstraction that allows developers to switch between
- [spring-projects/spring-framework](https://awesome-repositories.com/repository/spring-projects-spring-framework.md) (60,056 ⭐) — Spring Framework is an enterprise Java framework providing a comprehensive infrastructure for building server-side applications. It functions as a dependency injection container and a Java application framework designed to support scalable backend development through modular architecture.

The project provides tools for aspect-oriented programming to intercept method calls using dynamic proxies, allowing the application of cross-cutting concerns such as security and transactions. It also includes a centralized system for managing object lifecycles and coordinating component wiring by injecting
- [atmosphere/atmosphere](https://awesome-repositories.com/repository/atmosphere-atmosphere.md) (3,780 ⭐) — Atmosphere is a Java-based framework for building and coordinating AI agents. It provides a real-time transport layer for streaming data via WebSockets, SSE, gRPC, and WebTransport, alongside a multi-agent orchestration framework for managing agent fleets through sequential, parallel, and graph-based execution workflows.

The project features a durable workflow engine that persists agent state as snapshots, allowing long-running tasks to survive system restarts and incorporate human-in-the-loop approvals. It also implements Model Context Protocol servers to expose tools, resources, and prompt
- [undertow-io/undertow](https://awesome-repositories.com/repository/undertow-io-undertow.md) (3,748 ⭐) — Undertow is a Java HTTP web server and non-blocking I/O server implementation. It functions as a Jakarta Servlet container and a WebSocket server, providing the infrastructure to execute standardized servlet components and maintain persistent full-duplex communication channels for real-time data exchange.

The project is characterized by an asynchronous architecture that utilizes a non-blocking I/O model to handle large numbers of concurrent connections. It incorporates buffer-pooling mechanisms and zero-copy data transfers to reduce memory allocation and garbage collection pressure.

The syst