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Head-to-head · Property-Based Testing Tools

fast-check vs Scala Hedgehog

  • Updated Nov 2026
  • Both researched from official sources
  • 4 checks side by side
Higher score fast-check #1 in Property-Based Testing Tools 9.4/10 Open source Free plan✓ 3 of 3 features Visit fast-check
Scala Hedgehog #6 in Property-Based Testing Tools 8.8/10 Free plan Free plan✓ 3 of 3 features Visit Scala Hedgehog

fast-check leads on 0 checks, Scala Hedgehog on 0, and 4 are even. Who comes out ahead on the 4 yes/no, price and count checks where we have data for both products. The editor score weighs everything else too.

Our verdict

  • Highest scorefast-check · 9.4/10
  • Free planboth

fast-check scores higher on our rubric for property-based testing tools: 9.4 against 8.8 out of 10; our editors rank them #1 and #6.

fast-check is the better fit for javaScript and TypeScript teams. Scala Hedgehog is the better fit for scala teams using MUnit or Minitest.

  • fast-check fits best

    JavaScript and TypeScript teams

  • Scala Hedgehog fits best

    Scala teams using MUnit or Minitest

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Side by side

Feature fast-check 9.4/10 Visit ↗ Scala Hedgehog 8.8/10 Visit ↗
At a glance
Editor score 9.4 8.8
Ranking #1 in Property-Based Testing Tools #6 in Property-Based Testing Tools
Best for JavaScript and TypeScript teams Scala teams using MUnit or Minitest
Pricing model Free Free
Starting price Open source Free plan
Free plan ✓ ✓
Free trial — —
Deployment Self-hosted Self-hosted
Support Docs, Community Docs
Integrations 7 integrations 4 integrations
Built for Solo, Small business, Mid-market, Enterprise Solo, Small business, Mid-market, Enterprise
Features fast-check 3/3 · Scala Hedgehog 3/3
Failing-case shrinking ✓ ✓
Stateful testing ✓ ✓
Reproducible failures ✓ ✓
Specs
Supported languages JavaScript, TypeScript Scala, Java
Test runner support Jest, Mocha, Vitest, Ava, Bun, Deno, Node.js test runner sbt, Minitest, MUnit
Cases per run Not checked yet Not checked yet
Our review
Pros
  • Shrinks failures and supports deterministic replay with seeds and paths
  • Supports stateful, asynchronous, fuzzing, and scheduler-based testing
  • Integrates with Jest, Mocha, Vitest, Ava, Bun, Deno, and Node.js
  • Automatic generation and integrated shrinking simplify failing cases
  • State-machine testing supports stateful systems
  • Seed-based replay makes failures reproducible
Cons
  • Its scope is limited to JavaScript and TypeScript
  • Advanced stateful and scheduler workflows require thoughtful test design
  • It does not provide AI-assisted testing features
  • The project is described as being in an early-release stage
  • Its runner integrations are focused on sbt, Minitest, and MUnit
  • It is less broadly integrated than higher-ranked Scala alternatives
Our verdict

fast-check is an open-source property-based testing library for JavaScript and TypeScript. It generates inputs, runs properties repeatedly, and reduces failing inputs to smaller cases that are easier to investigate. The library suits teams…

Read the review →

Scala Hedgehog is an open-source property-based testing library for Scala and Java programs. It generates test data from property specifications, shrinks failing examples, and supports state-machine testing for stateful systems. The…

Read the review →
  1. fast-checkProperty-Based Testing Tools 9.4Open source
  2. Scala HedgehogProperty-Based Testing Tools 8.8Free plan

Strengths and trade-offs

  • fast-check — where it wins

    • Shrinks failures and supports deterministic replay with seeds and paths
    • Supports stateful, asynchronous, fuzzing, and scheduler-based testing
    • Integrates with Jest, Mocha, Vitest, Ava, Bun, Deno, and Node.js

    Where it doesn't

    • Its scope is limited to JavaScript and TypeScript
    • Advanced stateful and scheduler workflows require thoughtful test design
    • It does not provide AI-assisted testing features

  • Scala Hedgehog — where it wins

    • Automatic generation and integrated shrinking simplify failing cases
    • State-machine testing supports stateful systems
    • Seed-based replay makes failures reproducible

    Where it doesn't

    • The project is described as being in an early-release stage
    • Its runner integrations are focused on sbt, Minitest, and MUnit
    • It is less broadly integrated than higher-ranked Scala alternatives

fast-check vs Scala Hedgehog: questions

Which is better for Property-Based testing tools, fast-check or Scala Hedgehog?

fast-check scores higher on our rubric for property-based testing tools: 9.4 against 8.8 out of 10; our editors rank them #1 and #6.

How do fast-check and Scala Hedgehog compare?

All 4 checks we put side by side come out level: neither leads on any.

Do fast-check and Scala Hedgehog have a free plan?

fast-check: Yes. Scala Hedgehog: Yes.

More comparisons

All Property-Based testing tools comparisons → · Full ranking →

Reviewed by iTechGuides Editors · Editorial team · Updated Nov 2026

Last updated · How we research and update