EsotericSoftware/kryonet

Health v2 · maintenance only

Adoption not part of the score

1852 stars · 411 forks observed · 2026-08-28

What it is AI-extracted, prompt v1, taxonomy v1, 2026-08-30, confidence not recorded

KryoNet is a Java library providing a simple API for efficient TCP and UDP client/server communication built on NIO, using the Kryo serialization library to automatically transfer object graphs. It runs on desktop JVMs and Android and is well suited to games and other client/server applications.

Use cases

• build a multiplayer game client/server in Java
• send objects between a Java client and server over TCP or UDP
• implement inter-process communication between JVM applications
• discover game servers on a LAN
• efficiently serialize and transfer object graphs over the network
• add remote method invocation to a Java app

When to choose

• you need simple, efficient TCP/UDP networking in Java or on Android
• you want automatic serialization of object graphs without writing protocol code
• you are building a game or real-time client/server application on the JVM

When to avoid

• you need HTTP/REST or WebSocket communication
• you need a maintained library with recent releases and active development
• you are not on the JVM (e.g., need cross-language clients)
• you need enterprise-grade features like TLS, clustering, or service discovery

Facets

library · maturity maintenance

serialization rpc networking microservices developer-tools jvm cross-platform tcp udp nio kryo client-server lan-discovery rmi game-networking game-development android desktop

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