Best Contract Testing Tools in 2026
Updated
When services depend on shared API agreements, contract testing tools help teams verify those expectations between consumers and providers. Compared on AsyncAPI support, consumer verification, contract formats, contract registry, free plan, GraphQL support, paid from, provider verification, and self-hosted deployment, the options can be assessed against your APIs and operating preferences. Microcks, Pact, and Pact Broker are among the entries. Start with the contract formats and verification steps your team needs, then consider registry, hosting, and pricing requirements.
Contract Testing Tools, one module each.A lit port is something its maker publishes; 17 of 17 with a known API signal have a public API.
- 01 BBC Consumer Contracts API yesFREE yesDOCS 7.4Free
- 02 Microcks API yesFREE yesDOCS 7.4Free
- 03 Pact API yesFREE yesDOCS 7.4$115.42/mo
- 04 Pact Broker API yesFREE yesDOCS 7.4$115.42/mo
- 05 BitDive API yesFREE yesDOCS 7.3Free
- 06 Confluent Cloud API yesFREE yesDOCS 7.3$385/mo
- 07 GraphQL Hive API yesFREE yesDOCS 7.3$20/mo
- 08 Karapace API yesFREE yesDOCS 7.3Free
- 09 Karate API yesFREE yesDOCS 7.3$8.33/mo
- 10 oasdiff API yesFREE yesDOCS 7.3$100/mo
- 11 PactFlow API yesFREE yesDOCS 7.3$115.42/mo
- 12 SpecShield API yesFREE yesDOCS 7.3$89/mo
- 13 Stubborn Contract API yesFREE yesDOCS 7.3Free
- 14 Apicurio Registry API yesDOCS 7.0
- 15 ContractCase API yesDOCS 7.0
- 16 Entente API yesDOCS 6.9
- 17 Signet API yesDOCS 6.9
- 18 Specmatic FREE yesDOCS 6.0$1.67/mo
- 19 API Contract Tester FREE yesDOCS 5.9$19/mo
- 20 Citrus FREE yesDOCS 5.8Free
- 21 Schemathesis FREE yesDOCS 5.8Free
- 22 WSO2 Contract Test Runner FREE yesDOCS 5.8Free
Compare all 22 in a table
| # | Platform | Score | Free plan | From | Free plan | Paid from | Contract formats | Consumer verification |
|---|---|---|---|---|---|---|---|---|
| 1 | BBC Consumer Contracts | 7.4 | Free plan | Free | Yes | JavaScript | Yes | |
| 2 | Microcks | 7.4 | Free plan | Free | Yes | |||
| 3 | Pact | 7.4 | Free plan | $115.42/mo | Yes | |||
| 4 | Pact Broker | 7.4 | Free plan | $115.42/mo | Yes | Pact JSON (HTTP and message interactions) | Yes | |
| 5 | BitDive | 7.3 | Free plan | Free | Yes | JSON, XML | ||
| 6 | Confluent Cloud | 7.3 | Free plan | $385/mo | Yes | 385 /mo | ||
| 7 | GraphQL Hive | 7.3 | Free plan | $20/mo | Yes | GraphQL schemas in GraphQL SDL format | Yes | |
| 8 | Karapace | 7.3 | Free plan | Free | Yes | Avro, JSON Schema, Protobuf | No | |
| 9 | Karate | 7.3 | Free plan | $8.33/mo | Yes | |||
| 10 | oasdiff | 7.3 | Free plan | $100/mo | Yes | 100 /mo | OpenAPI 3.0, OpenAPI 3.1, OpenAPI 3.2; JSON and YAML | |
| 11 | PactFlow | 7.3 | Free plan | $115.42/mo | Yes | 115.42 /mo | ||
| 12 | SpecShield | 7.3 | Free plan | $89/mo | Yes | 75 /mo | OpenAPI (JSON/YAML), GraphQL | Yes |
| 13 | Stubborn Contract | 7.3 | Free plan | Free | Yes | YAML, Groovy, Java, Kotlin | Yes | |
| 14 | Apicurio Registry | 7.0 | OpenAPI, AsyncAPI, GraphQL, Apache Avro, Google Protobuf, JSON Schema, Kafka Connect, WSDL, XML Schema, ODCS v3.1 | Yes | ||||
| 15 | ContractCase | 7.0 | ContractCase Case Files; JSON for HTTP contracts | Yes | ||||
| 16 | Entente | 6.9 | OpenAPI | Yes | ||||
| 17 | Signet | 6.9 | OpenAPI, Pact | Yes | ||||
| 18 | Specmatic | 6.0 | Free plan | $1.67/mo | Yes | |||
| 19 | API Contract Tester | 5.9 | Free plan | $19/mo | Yes | 19 /mo | TypeScript, OpenAPI, JSON | |
| 20 | Citrus | 5.8 | Free plan | Free | Yes | |||
| 21 | Schemathesis | 5.8 | Free plan | Free | Yes | |||
| 22 | WSO2 Contract Test Runner | 5.8 | Free plan | Free | JSON | Yes |
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Numbered spots on this list can be sponsored, and a sponsored row is labelled as paid.