Specifiction
For vendors
AdvertiseTop spots, featured rows, home sponsor Get listedAdd a product we don't cover yet Claim a listingFree: verify the domain, then correct your page Vendor dashboardNumbers, orders and placements
List your tool
Vendor dashboard
Tech riderRev. 5 Oct 2026

Stubborn Contract

Ch 146.8of 22 Contract Testing Tools
  1. 1Runs onAPI, self-hosted
  2. 2CostsFree plan
  3. 3Contract formatsYAML, Groovy, Java, Kotlin
  4. 4Consumer verificationYes
  5. 5Provider verificationYes
  6. 6Contract registryYes
  7. 7Self-hosted deploymentYes
7 lines stated Written from the maker's own pages: stubborn.sh
Visit site Alternatives
The Stubborn Contract homepage

Overview

Stubborn Contract is ranked #14 of 22 in contract testing tools on Specifiction. It runs on API, Self-hosted. There is a free plan.

Stubborn Contract plans and pricing

All plans
Open-source core Free Contract-testing core and Stubborn Broker OSS · free to use, modify, and deploy under Apache 2.0 stubborn.sh · 5 Oct 2026
Enterprise Partnership Not published Scoped to the organization’s needs; no public pricing Stubborn Pro capabilities · migration planning · architecture sessions · priority engineering · direct maintainer communication · custom integrations stubborn.sh · 5 Oct 2026

Compared on contract testing tools

Free plan
Yesstubborn.sh
Contract formats
YAML, Groovy, Java, Kotlinstubborn.sh
Consumer verification
Yesstubborn.sh
Provider verification
Yesstubborn.sh
Contract registry
Yesstubborn.sh
Self-hosted deployment
Yesstubborn.sh

Facts

Purpose
Stubborn Contract is the official continuation of Spring Cloud Contract, providing consumer-driven contract testing for HTTP and message-based interactions.github.com · 5 Oct 2026
Open-source license
The contract-testing core and Stubborn Broker OSS are licensed under Apache 2.0 and are free to use, modify, and deploy.stubborn.sh · 5 Oct 2026
HTTP and messaging
The testing project supports contracts for both HTTP and message-based interactions.github.com · 5 Oct 2026
Supported formats
Existing Groovy DSL, YAML, and Java DSL contracts continue to work during migration.stubborn.sh · 5 Oct 2026
Broker governance
Stubborn Broker verifies contracts across branches and services and provides a CI-friendly can-i-deploy check.stubborn.sh · 5 Oct 2026
Broker features
The Broker page lists branch-aware governance, AI contract generation from captured HTTP traffic, and AI-agent integration through MCP.stubborn.sh · 5 Oct 2026
Languages
The Broker page lists Java, Kotlin, JavaScript, and TypeScript SDK support.stubborn.sh · 5 Oct 2026
Messaging integrations
Stubborn Contract 0.1.2 adds Spring-free messaging building blocks for Kafka, RabbitMQ, and JMS.stubborn.sh · 5 Oct 2026
Build integrations
Contracts can be published through Maven or Gradle plugins, or through the CLI.stubborn.sh · 5 Oct 2026
Self-hosting
The Broker page provides a Docker command to run the server locally on port 8080.stubborn.sh · 5 Oct 2026
Runtime requirement
Stubborn Contract 0.1.2 runs on Java 17 or later and is listed as tested with Java 21 and 25 and Spring Boot 4.1.stubborn.sh · 5 Oct 2026
Migration
The migration guide says an OpenRewrite recipe automates mechanical migration steps from Spring Cloud Contract.stubborn.sh · 5 Oct 2026
Community support
Community support is best effort through GitHub issues, with no public SLA for free support.stubborn.sh · 5 Oct 2026
Enterprise support
Enterprise Partnerships include direct maintainer communication and support for integrating the project into an organization’s CI/CD and deployment pipelines.stubborn.sh · 5 Oct 2026
Who it is for
Enterprise Partnerships are offered to organizations that rely on Stubborn Contract in production and want migration planning, roadmap participation, or dedicated support.stubborn.sh · 5 Oct 2026

Best Stubborn Contract alternatives

See all 20
All accessCh 01 oasdiff Free planFree trialAPI from $100/mo7.8 All accessCh 02 Pact Free planFree trialAPI from $115.42/mo7.8 All accessCh 03 Microcks Free planAPIBrowser Free to start7.6 All accessCh 04 Pact Broker Free planFree trialAPI from $115.42/mo7.5 All accessCh 05 Confluent Cloud Free planFree trialAPI from $385/mo7.4 All accessCh 06 GraphQL Hive Free planFree trialAPI from $20/mo7.3

Where it ranks on Specifiction

Is Stubborn Contract yours?

Claim it for free: prove the domain, then correct facts, plans and screenshots. An editor reviews every change.

Claim it free Promote Stubborn Contract

Sources