10 open source projects written in Scala
Every Scala project in the registry, ranked by GitHub stars — license and last push on every entry, data pulled live from the GitHub API every night.
delta ★ 9.1K An open-source storage framework that enables building a Lakehouse architecture with compute engines including Spark, PrestoDB, Flink, Trino, and Hive and APIs
finagle ★ 8.9K A fault tolerant, protocol-agnostic RPC system
sbt ★ 5.0K sbt, the interactive build tool
mill ★ 2.8K A better build tool for Java, Scala and Kotlin: Simpler than Maven, easier than Gradle, with 3-7x faster dev workflows than other JVM build tools
metals ★ 2.3K Scala language server with rich IDE features 🚀
tapir ★ 1.5K Rapid development of self-documenting APIs
rudder ★ 721 Rudder is a configuration and security automation platform. Manage your Cloud, hybrid or on-premises infrastructure in a simple, scalable and dynamic way.
airframe ★ 666 Essential Building Blocks for Scala
metorikku ★ 589 A simplified, lightweight ETL Framework based on Apache Spark
build-server-protocol ★ 554 Protocol for IDEs and build tools to communicate about compile, run, test, debug and more.
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Frequently asked questions
How many open source projects are written in Scala?
This registry tracks 10 Scala projects, with 32,030 GitHub stars between them and a median of 1,475 stars. The most-adopted is delta at 9,065 stars.
Which Scala projects are most actively maintained?
10 of the 10 projects were pushed in the last 90 days. Each entry above shows its exact last-push date, so you can filter out dormant projects before committing to one.
What licence are Scala projects usually under?
10 of the 10 carry an explicit open-source licence across 3 distinct licences, and the licence is shown on every card. Permissive licences (MIT, Apache-2.0) are the safest default for commercial use; check the copyleft ones individually.
Where do I start with a Scala project?
Start from the ranked list above — it orders every tracked Scala project by GitHub stars, with licence, last-push date and category on each card so you can judge adoption and whether it is still maintained.