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scalaprops

Free#21 of 27 in Property-Based Testing Tools

scalaprops: A focused Scala library for generated properties, law checking, and reproducible failures. Ranked #21 of 27 in Property-Based Testing Tools by our editors (7.3/10); pricing: Free plan; best for scala teams needing law checking.

7.3/10★★★★☆Editor score

Visit scalaprops

At a glance

• Editor score
  7.3 / 10
• Pricing
  Free plan
• Best for
  Scala teams needing law checking
• Free plan
  Yes
• Paid from
  Free
• Supported languages
  Scala
• Facts checked
  20 Sep 2026

• Where it wins

  • Generates properties and Scala functions with Cogen
  • Supports law checking, timeouts, and per-test configuration
  • Replays deterministic failures across Scala.js and Scala Native

• Where it doesn't

  • Supports Scala rather than multiple programming languages
  • Workflow centers on ScalapropsFramework and sbt
  • Configuration is defined at the individual-test level

Our verdict on scalaprops

scalaprops is an open-source property-based testing library for Scala projects. It is designed for developers who want generated test data, function generators, law checking, and reproducible failures within Scala codebases. The library supports Scala.js and Scala Native, making it suitable for teams working across those Scala platforms as well as standard sbt-based projects. Its MIT License and free availability also fit projects that prefer an open-source testing library.

Its strongest fit is a Scala workflow built around sbt. scalaprops can be used through its sbt test framework and provides an sbt plugin, while Scalaz integration adds datatype instances and related support. The library includes generators for Scala functions using Cogen, immutable random number generation, configurable parameters for individual tests, timeout handling, and deterministic testing with seed replay. Together, these features support repeatable property checks and focused law testing rather than a general-purpose, multi-language testing workflow.

The published model is straightforward: scalaprops is open source and available without paid tiers. Teams should choose it when Scala support, law checking, deterministic replay, and Scala.js or Scala Native compatibility are central requirements. Its scope is narrower for organizations that need one testing tool across several programming languages or a workflow beyond the Scala and sbt ecosystem. Teams should also evaluate their requirements for advanced property-testing capabilities separately, since the documented emphasis is on generation, laws, configuration, timeouts, and reproducibility.

Your product? Our editors can test scalaprops in depth and publish a review, labelled as paid · from $149/mo →

scalaprops pricing

scalaprops fact sheet

scalaprops integrations

scalaprops lists 2 integrations on its own site.

• sbt
• Scalaz

Alternatives to scalaprops

• fast-checkA deep, runner-agnostic testing library for JavaScript and TypeScript teams.9.4
• HypothesisA focused Python library for generated inputs, shrinking, and stateful tests.9.3
• ProptestA focused Rust framework for generated inputs, shrinking, replay, and stateful tests.9.1

See all scalaprops alternatives →

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Featured on iTechGuides

Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026

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Last updated 7 Oct 2026 · How we research and update