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Top 15 Scala reactive-stream Projects
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SaaSHub
SaaSHub - Software Alternatives and Reviews. SaaSHub helps you find the best software and product alternatives
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Reactive-kafka
Alpakka Kafka connector - Alpakka is a Reactive Enterprise Integration library for Java and Scala, based on Reactive Streams and Akka.
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alpakka
Alpakka is a Reactive Enterprise Integration library for Java and Scala, based on Reactive Streams and Akka.
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Phantom
Schema safe, type-safe, reactive Scala driver for Cassandra/Datastax Enterprise (by outworkers)
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AkkaGRPC
A platform to build and run apps that are elastic, agile, and resilient. SDK, libraries, and hosted environments.
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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).
Scala reactive-streams discussion
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2022 Laminar Ecosystem Update – new libraries, web components, tutorials, sponsors
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A note from our sponsor - SaaSHub
www.saashub.com | 12 Jul 2026
Index
What are some of the best open-source reactive-stream projects in Scala? This list will help you:
| # | Project | Stars |
|---|---|---|
| 1 | Monix | 1,933 |
| 2 | Elastic4s | 1,637 |
| 3 | sttp | 1,503 |
| 4 | Reactive-kafka | 1,421 |
| 5 | alpakka | 1,270 |
| 6 | Phantom | 1,042 |
| 7 | Laminar | 831 |
| 8 | ox | 520 |
| 9 | AkkaGRPC | 432 |
| 10 | kmq | 341 |
| 11 | Airstream | 272 |
| 12 | Pulsar4s | 233 |
| 13 | Play WS | 224 |
| 14 | Clickhouse-scala-client | 118 |
| 15 | plant-simulator | 35 |