Top 17 Scala Reactive Projects

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1. Akka

   1 34 13,275 8.6 Scala

   A platform to build and run apps that are elastic, agile, and resilient. SDK, libraries, and hosted environments.

   

2. SaaSHub

   www.saashub.com sponsored

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

   

3. Play

   2 34 12,618 9.8 Scala

   The Community Maintained High Velocity Web Framework For Java and Scala.

   

   Project mention: Weather MCP | dev.to | 2026-03-31

   During my career break that I started in 2025, I started exploring the ever-changing Generative AI landscape. In Decemember, I was exploring Spring Boot as I hadn't used it in anger professionally having used other Java frameworks like Jersey, Play and I wanted to build something.

4. Lagom

   3 0 2,629 5.7 Scala

   Reactive Microservices for the JVM

   

5. pekko

   4 10 1,625 9.8 Scala

   Build highly concurrent, distributed, and resilient message-driven applications using Java/Scala

   

6. Reactive-kafka

   5 0 1,422 6.2 Scala

   Alpakka Kafka connector - Alpakka is a Reactive Enterprise Integration library for Java and Scala, based on Reactive Streams and Akka.

   

7. Akka HTTP

   6 6 1,350 7.1 Scala

   The Streaming-first HTTP server/module of Akka

   

8. alpakka

   7 1 1,269 7.7 Scala

   Alpakka is a Reactive Enterprise Integration library for Java and Scala, based on Reactive Streams and Akka.

   

9. Phantom

   8 1 1,042 0.0 Scala

   Schema safe, type-safe, reactive Scala driver for Cassandra/Datastax Enterprise (by outworkers)

   

10. ReactiveMongo

    9 1 857 8.2 Scala

    :leaves: Non-blocking, Reactive MongoDB Driver for Scala

    

11. topshell

    10 5 483 0.0 Scala

    TopShell - a purely functional, reactive scripting language

    

12. OutWatch

    11 1 468 6.2 Scala

    The Functional and Reactive Web-Frontend Library for Scala.js

    

13. AkkaGRPC

    12 0 433 7.2 Scala

    A platform to build and run apps that are elastic, agile, and resilient. SDK, libraries, and hosted environments.

    

14. aecor

    13 1 325 0.0 Scala

    Pure functional event sourcing runtime

    

15. Pulsar4s

    14 0 233 4.7 Scala

    Idiomatic, typesafe, and reactive Scala client for Apache Pulsar

    

16. Play WS

    15 2 224 8.7 Scala

    Standalone Play WS, an async HTTP client with fluent API

    

17. lila-ws

    16 2 181 9.2 Scala

    Lichess' websocket server

    

18. Clickhouse-scala-client

    17 1 118 7.9 Scala

    Clickhouse Scala Client with Reactive Streams support

    

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• A note from our sponsor - SaaSHub
  www.saashub.com | 19 Aug 2026

  SaaSHub helps you find the best software and product alternatives Learn more →

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