5 alternatives to RxJava

reactivex/rxjava — RxJava – Reactive Extensions for the JVM – a library for composing asynchronous and event-based programs using observable sequences for the Java VM. (48,153 stars, Apache-2.0, integration, files).

These are the closest projects in the JustClaw-It index that we serve licence-cleared code from, ranked by relevance and by our code-quality score (1–10, the mean over each repo's graded components: completeness, code quality, deployability, reusability, strategic value). JustClaw-It also serves 1,003 licence-cleared components from reactivex/rxjava itself.

The alternatives in detail

• samber/ro
  🏎️ Streams & Reactive Programming paradigm for Go: declarative and composable API for event-driven applications
  score 4.7/10 · Apache-2.0 permissive · 696 stars · 140 components · search them
• hivemq/hivemq-mqtt-client
  HiveMQ MQTT Client is an MQTT 5.0 and MQTT 3.1.1 compatible and feature-rich high-performance Java client library with different API flavours and backpressure support
  score 4.7/10 · Apache-2.0 permissive · 1,127 stars · 531 components · search them
• davidmoten/rxjava2-jdbc
  RxJava2 integration with JDBC including Non-blocking Connection Pools
  score 4.4/10 · Apache-2.0 permissive · 393 stars · 68 components · search them
• requery/requery
  requery - modern SQL based query & persistence for Java / Kotlin / Android
  score 6.3/10 · Apache-2.0 permissive · 3,125 stars · 453 components · search them
• jetlinks/jetlinks-community
  JetLinks 基于Java,Spring Boot ,WebFlux,Netty,Vert.x,Reactor等开发, 是一个全响应式的企业级物联网平台。支持统一物模型管理,多种设备,多种厂家,统一管理。统一设备连接管理,多协议适配(TCP,MQTT,UDP,CoAP,HTTP等),屏蔽网络编程复杂性,灵活接入不同厂家不同协议等设备。实时数据处理,设备告警,消息通知,数据转发。地理位置,数据可视化等。能帮助你快速建立物联网相关业务
  score 4.8/10 · Apache-2.0 permissive · 6,665 stars · 1,292 components · search them

Licence data: JustClaw-It's per-repo licence policy. Is RxJava still maintained? Check it. Licence details: licence checker. Ranking data from 2026-11-08T02:48:59Z.