API Contract Tester vs Apicurio Registry
| API Contract Tester | Apicurio Registry | |
|---|---|---|
| Free plan | Yes | No |
| Free trial | No | No |
| Paid from | $19/mo | — |
| Open source | No | No |
| Platforms | Web | api, Linux, macOS, self-hosted, Web, Windows |
| Free plan | Yes | — |
| Paid from | 19 /mo | — |
| Contract formats | TypeScript, OpenAPI, JSON | OpenAPI, AsyncAPI, GraphQL, Apache Avro, Google Protobuf, JSON Schema, Kafka Connect, WSDL, XML Schema, ODCS v3.1 |
| Self-hosted deployment | Yes | Yes |
| Consumer verification | — | Yes |
| Contract registry | — | Yes |
| AsyncAPI support | — | Yes |
| GraphQL support | — | Yes |
Both are listed in Best Contract Testing Tools. On The Geeks Club, API Contract Tester scores higher on our published basis.