Top 13 Scala reactive-stream Projects

Monix

2 1,879 6.6 Scala

Asynchronous, Reactive Programming for Scala and Scala.js.

Project mention: Scala isn't fun anymore | reddit.com/r/programming | 2022-09-10

The author is the creator of Monix and implemented the first version of cats-effect. He knows what he is doing.
Elastic4s

1 1,615 8.1 Scala

Elasticsearch Scala Client - Reactive, Non Blocking, Type Safe, HTTP Client

Project mention: How to decouple logic from Scala future? | reddit.com/r/scala | 2022-12-14

Here's an example from a library I've used: https://github.com/sksamuel/elastic4s/blob/master/elastic4s-core/src/main/scala/com/sksamuel/elastic4s/Executor.scala. Then you can provide your own Executor implementation and it will be used instead of the FutureExecutor. You can check out the top level of that repo to see how much complexity this introduces.
SonarQube

www.sonarqube.org
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Reactive-kafka

0 1,396 8.9 Scala

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

1 1,322 9.8 Scala

The Scala HTTP client you always wanted!

Project mention: Scala Toolkit makes Scala powerful straight out of the box | reddit.com/r/scala | 2022-11-10
alpakka

0 1,245 6.7 Scala

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

0 1,049 0.0 Scala

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

8 594 6.0 Scala

Simple, expressive, and safe UI library for Scala.js (by raquo)

Project mention: Scala DevInTraining looking to contribute to projects | reddit.com/r/scala | 2023-01-15
InfluxDB

www.influxdata.com
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Build time-series-based applications quickly and at scale.. InfluxDB is the Time Series Platform where developers build real-time applications for analytics, IoT and cloud-native services. Easy to start, it is available in the cloud or on-premises.
AkkaGRPC

0 421 8.1 Scala

Akka gRPC
Play WS

1 213 8.4 Scala

Standalone Play WS, an async HTTP client with fluent API

Project mention: Code in jar dependency is packed as java code and can not be used as normal Scala dependency | reddit.com/r/scala | 2022-05-04

Take a look at https://github.com/playframework/play-ws build.sbt. it is a scala lib built with sbt-assembly to shade dependencies and avoid binary incompatibility. That is the only reason to build a lib with sbt-assembly.
Pulsar4s

0 213 7.0 Scala

Idiomatic, typesafe, and reactive Scala client for Apache Pulsar
Airstream

2 183 7.0 Scala

State propagation and event streams with mandatory ownership and no glitches (by raquo)

Project mention: 2022 Laminar Ecosystem Update – new libraries, web components, tutorials, sponsors | reddit.com/r/scala | 2022-06-23

I recommend you read the section for each of those in the readme here https://github.com/raquo/Airstream
Clickhouse-scala-client

1 105 8.5 Scala

Clickhouse Scala Client with Reactive Streams support

Project mention: Anyone using Clickhouse in Scala? What client do you use? | reddit.com/r/Clickhouse | 2023-01-19
plant-simulator

1 24 7.2 Scala

Power Plant simulator service that can ramp up and down power producing units

Project mention: Is it worthy to write a OCPP OpenSource implementation? | reddit.com/r/ocpp | 2022-08-02

NOTE: The open source projects on this list are ordered by number of github stars. The number of mentions indicates repo mentiontions in the last 12 Months or since we started tracking (Dec 2020). The latest post mention was on 2023-01-19.

Scala reactive-streams related posts

Anyone using Clickhouse in Scala? What client do you use?
1 project | reddit.com/r/Clickhouse | 19 Jan 2023
How to decouple logic from Scala future?
1 project | reddit.com/r/scala | 14 Dec 2022
2022 Laminar Ecosystem Update – new libraries, web components, tutorials, sponsors
1 project | reddit.com/r/scala | 23 Jun 2022
Stockholm Syndrome Escape Velocity (A Talk About Scala.js)
3 projects | reddit.com/r/scala | 25 Jan 2021

Index

What are some of the best open-source reactive-stream projects in Scala? This list will help you:

	Project	Stars
1	Monix	1,879
2	Elastic4s	1,615
3	Reactive-kafka	1,396
4	sttp	1,322
5	alpakka	1,245
6	Phantom	1,049
7	Laminar	594
8	AkkaGRPC	421
9	Play WS	213
10	Pulsar4s	213
11	Airstream	183
12	Clickhouse-scala-client	105
13	plant-simulator	24