hammox

The premium Open Source alternative to Pact

🎯 Best for:Elixir developers needing strict interface enforcement between modules and external services.
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Apache-2.0License

What is hammox?

Replaces manual mock verification with automated type-checked contract testing for Elixir functions. It ensures that mocks strictly adhere to defined behaviors using Elixir typespecs and behaviors.

Tech Stack
ElixirTesting & QA

Why hammox?

  • Automated mock verification
  • Leverages native Elixir behaviors
  • Reduces boilerplate in unit tests

Limitations

  • Limited to Elixir ecosystem
  • Requires strict typespec maintenance
  • Learning curve for complex behaviors
2/17/2026
Last Update
30
Forks
17
Issues
Apache-2.0
License
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Competitor Cost
-$1,440
/ year (est. based on Pact)
Self-Hosted
$0
/ year
Team Size10 Users
150+
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