SpecShield vs Stubborn Contract
| SpecShield | Stubborn Contract | |
|---|---|---|
| Free plan | Yes | No |
| Free trial | No | No |
| Paid from | $89/mo | — |
| Open source | No | No |
| Platforms | api, extension, Web | — |
| Free plan | Yes | Yes |
| Paid from | 75 /mo | — |
| Contract formats | OpenAPI (JSON/YAML), GraphQL | YAML, Groovy, Java, Kotlin |
| Consumer verification | Yes | Yes |
| Provider verification | Yes | Yes |
| Contract registry | Yes | Yes |
| GraphQL support | Yes | — |
| Self-hosted deployment | Yes | Yes |
Both are listed in Best Contract Testing Tools. On Samsung Mobile US Press, SpecShield scores higher on our published basis.