Side by side
ContractCase vs Stubborn Contract
Both stand on contract testing tools. Which one you can start free with, which one lets you read the code, and what each costs once you pay.
Paid API
ContractCase covers contract definition, provider verification, and deployment checks across several service types. Its beta status, lack of contract merging, and broker UI limitation are important considerations.
Visit ContractCase
Free plan APISelf-hosted
Stubborn Contract combines an open-source contract-testing core with a Broker for cross-branch checks and deployment decisions. It is a practical fit for teams working with supported contract formats and Java-based messaging integrations, though free community support has no public SLA.
Visit Stubborn ContractThe facts
| ContractCase | Stubborn Contract | |
|---|---|---|
| Free plan | Not published | Yes |
| Open source | Not published | Not published |
| Runs on | API | API, Self-hosted |
| Lowest paid plan | Not published | Free or on request |
| Plans published | None | 2 |
| Maker | Not published | Not published |
| Website | case.contract-testing.io | stubborn.sh |
| On contract testing tools | #22 of 22 | #18 of 22 |
ContractCase: what it does well
- Supports HTTP and function contract types
- Lists Jest, Vitest, and JUnit compatibility
- Plugins extend matchers, mocks, and DSL declarations
- CLI checks deployment safety against verification results
- Open source
What to know first
- Contract merging is not supported
- Pact Broker UI does not render its contracts
- Pre-1.0 versions may break in minor releases
- Failed verification does not throw by default
Stubborn Contract: what it does well
- Apache 2.0 core and Broker OSS are free to use.
- Supports HTTP and message-based contracts.
- Existing Groovy DSL, YAML, and Java DSL contracts continue to work.
- Broker verifies contracts across branches and services.
- Supports Kafka, RabbitMQ, and JMS messaging building blocks.
What to know first
- Community support is best effort, with no public free-support SLA.
- Java 17 or later is required.
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