EverythingXiaomi
For vendors
AdvertiseTop spots, featured rows, home sponsor Get listedAdd a product we don't cover yet Claim a listingFree: verify the domain, then correct your page Vendor dashboardNumbers, orders and placements
List your app
Vendor dashboard

Best API Contract Tester Alternatives in 2026

Updated

20 apps from contract testing tools ranked against API Contract Tester on the same published basis.

  1. 1
    Microcks Free plan apiextensionLinuxMacself-hosted Free7.3
    API Contract Tester vs Microcks
  2. 2
    oasdiff Free plan apiLinuxMacself-hostedWeb $100/mo7.3
    API Contract Tester vs oasdiff
  3. 3
    Pact Free plan apiLinuxMacself-hostedWin $115.42/mo7.3
    API Contract Tester vs Pact
  4. 4
    Specmatic Free plan LinuxMacself-hostedWin $1.67/mo7.2
    API Contract Tester vs Specmatic
  5. 5
    Karate Free plan apiextensionLinuxMacself-hosted $8.33/mo7.1
    API Contract Tester vs Karate
  6. 6
    Pact Broker Free plan apiLinuxself-hostedWeb $115.42/mo7.1
    API Contract Tester vs Pact Broker
  7. 7
    Confluent Cloud Free plan apiLinuxWeb $385/mo7.0
    API Contract Tester vs Confluent Cloud
  8. 8
    Schemathesis Free plan LinuxMacself-hostedWin Free7.0
    API Contract Tester vs Schemathesis
  9. 9
    GraphQL Hive Free plan apiself-hostedWeb $20/mo6.9
    API Contract Tester vs GraphQL Hive
  10. 10
    SpecShield Free plan apiextensionWeb $89/mo6.9
    API Contract Tester vs SpecShield
  11. 11
    Apicurio Registry apiLinuxMacself-hostedWeb 6.8
    API Contract Tester vs Apicurio Registry
  12. 12
    PactFlow Free plan apiself-hostedWeb $115.42/mo6.8
    API Contract Tester vs PactFlow
  13. 13
    Karapace Free plan apiself-hosted Free6.7
    API Contract Tester vs Karapace
  14. 14
    Stubborn Contract Free plan apiself-hosted Free6.7
    API Contract Tester vs Stubborn Contract
  15. 15
    WSO2 Contract Test Runner Free plan Linuxself-hosted Free6.7
    API Contract Tester vs WSO2 Contract Test Runner
  16. 16
    BitDive Web 5.7
    API Contract Tester vs BitDive
  17. 17
    Entente Web 5.7
    API Contract Tester vs Entente
  18. 18
    Signet apiself-hostedWeb 5.7
    API Contract Tester vs Signet
  19. 20
    BBC Consumer Contracts 5.5
    API Contract Tester vs BBC Consumer Contracts
  20. 21
    ContractCase 5.5
    API Contract Tester vs ContractCase

API Contract Tester alternatives compared

#AppScoreFree planFromRuns on
1Microcks7.3Free planFreeAPI, Browser, Linux, Mac, self-hosted, Web, Windows
2oasdiff7.3Free plan$100/moAPI, Linux, Mac, self-hosted, Web, Windows
3Pact7.3Free plan$115.42/moAPI, Linux, Mac, self-hosted, Windows
4Specmatic7.2Free plan$1.67/moLinux, Mac, self-hosted, Windows
5Karate7.1Free plan$8.33/moAPI, Browser, Linux, Mac, self-hosted, Windows
6Pact Broker7.1Free plan$115.42/moAPI, Linux, self-hosted, Web
7Confluent Cloud7.0Free plan$385/moAPI, Linux, Web
8Schemathesis7.0Free planFreeLinux, Mac, self-hosted, Windows
9GraphQL Hive6.9Free plan$20/moAPI, self-hosted, Web
10SpecShield6.9Free plan$89/moAPI, Browser, Web
11Apicurio Registry6.8No—API, Linux, Mac, self-hosted, Web, Windows
12PactFlow6.8Free plan$115.42/moAPI, self-hosted, Web
13Karapace6.7Free planFreeAPI, self-hosted
14Stubborn Contract6.7Free planFreeAPI, self-hosted
15WSO2 Contract Test Runner6.7Free planFreeLinux, self-hosted
16BitDive5.7No—Web
17Entente5.7No—Web
18Signet5.7No—API, self-hosted, Web
20BBC Consumer Contracts5.5No——
21ContractCase5.5No——
Make your app an alternative to API Contract Tester

The sponsored alternative slot on this page is labelled Sponsored.

See the price

Questions about API Contract Tester alternatives

What is the best alternative to API Contract Tester?

Microcks, number 1 in contract testing tools with a score of 7.3 out of 10. The others here: oasdiff, Pact, Specmatic and 16 more.

What is the best free alternative to API Contract Tester?

Microcks is the best-ranked alternative with a free plan. 14 of the 20 alternatives here publish a free plan on their own pricing pages.

How are these alternatives ranked?

Ranked on what each maker publishes: documentation depth, a free tier and the platforms it runs on.