Specmatic vs Bruno

Free tier available

From $19 per user (one-time, Golden Edition)

Open source core; commercial support and an enterprise insights product are sold separately.

The core is free and open source. A small one-time fee unlocks convenience features; an enterprise edition exists separately.

Open-source core covering contract testing and stubbing.

The open-source app and CLI are free and fully functional offline.

Emerging

Specmatic · since 2020

Widely used

Bruno Software · since 2023

• Spec-driven rather than consumer-driven, so it needs far less cross-team process than Pact.
• The same spec produces both the provider test and the consumer mock.
• Covers async messaging (Kafka, AsyncAPI) as well as HTTP.

• Collections live in Git, so they diff, branch and review like any other code.
• Offline-first with no forced account — a genuine compliance advantage.
• Imports Postman and Insomnia collections, making migration realistic.

• Only works if your specs are accurate and maintained.
• Smaller community than Pact, with fewer worked examples.
• Primarily JVM-oriented tooling.

• No built-in mock servers or monitoring; it is a client and runner, not a platform.
• Younger project with a smaller ecosystem and fewer integrations.
• Team collaboration relies on your Git workflow rather than in-app features.

Spec-first organisations that want contract enforcement without the Pact process overhead.

Engineering teams that want API tests versioned alongside the code they test.