Top 17 Scala Reactive Projects

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1. Akka

   1 33 13,144 9.3 Scala

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

   

2. InfluxDB

   influxdata.com featured

   InfluxDB high-performance time series database. Collect, organize, and act on massive volumes of high-resolution data to power real-time intelligent systems.

   

3. Play

   2 33 12,564 9.7 Scala

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

   

   Project mention: Deploying a Scala Play Application to Heroku | dev.to | 2025-04-08

   ~/project$ sbt run [info] welcome to sbt 1.10.6 (Ubuntu Java 17.0.14) [info] loading settings for project scala-api-heroku-build from plugins.sbt... [info] loading project definition from /home/alvin/repositories/devspotlight/heroku/scala/scala-api-heroku/project [info] loading settings for project root from build.sbt... [info] loading settings for project docs from build.sbt... [info] __ __ [info] \ \ ____ / /____ _ __ __ [info] \ \ / __ \ / // __ `// / / / [info] / / / /_/ // // /_/ // /_/ / [info] /_/ / .___//_/ \__,_/ \__, / [info] /_/ /____/ [info] [info] Version 3.0.6 running Java 17.0.14 [info] [info] Play is run entirely by the community. Please consider contributing and/or donating: [info] https://www.playframework.com/sponsors [info] --- (Running the application, auto-reloading is enabled) --- INFO p.c.s.PekkoHttpServer - Listening for HTTP on /[0:0:0:0:0:0:0:0]:9000 (Server started, use Enter to stop and go back to the console...)

4. Lagom

   3 0 2,631 5.7 Scala

   Reactive Microservices for the JVM

   

5. Reactive-kafka

   4 0 1,416 7.5 Scala

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

   

6. Akka HTTP

   5 6 1,336 8.1 Scala

   The Streaming-first HTTP server/module of Akka

   

7. pekko

   6 10 1,340 9.6 Scala

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

   

   Project mention: Hydro: Distributed Programming Framework for Rust | news.ycombinator.com | 2025-01-31

   Seems like it based on GH activity, but I don’t know for sure.

   https://github.com/apache/pekko

8. alpakka

   7 1 1,264 8.2 Scala

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

   

9. CodeRabbit

   coderabbit.ai featured

   CodeRabbit: AI Code Reviews for Developers. Revolutionize your code reviews with AI. CodeRabbit offers PR summaries, code walkthroughs, 1-click suggestions, and AST-based analysis. Boost productivity and code quality across all major languages with each PR.

   

10. Phantom

    8 1 1,046 0.0 Scala

    Schema safe, type-safe, reactive Scala driver for Cassandra/Datastax Enterprise

    

11. ReactiveMongo

    9 1 850 8.2 Scala

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

    

12. topshell

    10 5 480 0.0 Scala

    TopShell - a purely functional, reactive scripting language

    

13. OutWatch

    11 1 469 6.2 Scala

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

    

14. AkkaGRPC

    12 0 432 8.7 Scala

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

    

15. aecor

    13 1 324 0.0 Scala

    Pure functional event sourcing runtime

    

16. Pulsar4s

    14 0 230 6.0 Scala

    Idiomatic, typesafe, and reactive Scala client for Apache Pulsar

    

17. Play WS

    15 2 225 8.7 Scala

    Standalone Play WS, an async HTTP client with fluent API

    

18. lila-ws

    16 2 159 9.4 Scala

    Lichess' websocket server

    

19. Clickhouse-scala-client

    17 1 116 8.2 Scala

    Clickhouse Scala Client with Reactive Streams support

    

20. SaaSHub

    www.saashub.com featured

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

    

Scala Reactive related posts

• Play Framework – Build Modern and Scalable Web Apps with Java and Scala

  1 project | news.ycombinator.com | 23 Jun 2024

• Play Framework 2.9.0 Release Candidate

  1 project | news.ycombinator.com | 20 Sep 2023

• Play (1) Linux manual page

  1 project | news.ycombinator.com | 11 Jun 2023

• Scala opensource projects

  4 projects | /r/scala | 6 May 2023

• Play Framework for Java and Scala

  1 project | news.ycombinator.com | 1 May 2023

• How does web developement process compare to java web developement ?

  1 project | /r/Python | 2 Mar 2023

• Kalix: Move to the Cloud. Extend to the Edge. Go Beyond.

  1 project | dev.to | 13 Feb 2023
• A note from our sponsor - SaaSHub
  www.saashub.com | 30 Apr 2025

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

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InfluxDB high-performance time series database

Collect, organize, and act on massive volumes of high-resolution data to power real-time intelligent systems.

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