Karapace vs Stubborn Contract
| Karapace | Stubborn Contract | |
|---|---|---|
| Free plan | Yes | Yes |
| Free trial | No | No |
| Paid from | Free | Free |
| Open source | No | No |
| Platforms | api, self-hosted | api, self-hosted |
| Free plan | Yes | Yes |
| Contract formats | Avro, JSON Schema, Protobuf | YAML, Groovy, Java, Kotlin |
| Consumer verification | No | Yes |
| Provider verification | No | Yes |
| Contract registry | Yes | Yes |
| AsyncAPI support | No | — |
| GraphQL support | No | — |
| Self-hosted deployment | Yes | Yes |
Both are listed in Best Contract Testing Tools. On Inferse, Karapace scores higher on our published basis.