Skip to content
SPECIFICTION
Get listed

Developer Tools

Best API Mocking Tools in 2026

When a live service is unavailable or still being built, a mock can give development work a way to exercise API interactions. Compare supported protocols and request matching, then consider whether dynamic responses, OpenAPI import, and mock data generation fit your workflow.

  1. 01 Beeceptor

    It suits developers, testers, and QA professionals building or testing APIs, integrations, CI pipelines, and customer demos.

    From $10/mo Free plan Web · Windows · macOS · Linux
    9.5 Visit Specs
  2. 02 Mockfly

    Mockfly suits frontend, backend, mobile, QA, and testing engineers who need shared mock APIs.

    From €12.50/mo Free plan Web · Linux · API · Self-hosted
    9.2 Visit Specs
  3. 03 Microcks

    Microcks suits API owners, developers, quality assurance teams, and platform engineers who need API mocks, contract testing, or CI/CD checks.

    Free plan Web · Windows · macOS · Linux
    8.9 Visit Specs
  4. 04 MockAPI

    MockAPI suits developers, testers, and learners who need temporary REST endpoints and generated data.

    From $2.92/mo Free plan Web · API
    8.9 Visit Specs
  5. 05 Mockzilla

    Mockzilla suits developers building frontends, integration tests, or demos against mock APIs.

    From $10/mo Free plan Open source Web · Windows · macOS · Linux
    8.9 Visit Specs
  6. 06 Hoverfly

    It suits development and testing teams that need simulated HTTP/S services, scripted setup, or controlled failure behavior.

    From $10/mo Free trial Web · Windows · macOS · Linux
    8.5 Visit Specs
  7. 07 Knockout API

    The Free plan is positioned for evaluation, side projects, and open-source work.

    From $0.02/mo Free plan Web · API
    8.4 Visit Specs
  8. 08 Mockoon

    It suits developers and teams building or testing API-dependent applications, including those that need automated mock runs.

    From €10/mo Free trial Web · Windows · macOS · Linux
    8.4 Visit Specs
  9. 09 Mocki
    From $15/mo Free trial Web · API · Self-hosted
    8.0 Visit Specs
  10. 10 MockServer

    MockServer suits teams that need to simulate dependencies, validate API contracts, or inject failures into test traffic.

    Free plan Web · Windows · macOS · Linux
    8.0 Visit Specs
  11. 11 json-server
    Free plan API · Self-hosted
    7.8 Visit Specs
  12. 12 Mockttp

    Mockttp suits JavaScript developers building HTTP integration tests or custom proxies.

    Free plan Web · Windows · macOS · Linux
    7.8 Visit Specs
  13. 13 moqapi.dev
    From $29/mo Free plan Web · API
    7.8 Visit Specs
  14. 14 MockWebServer

    MockWebServer suits Android developers writing Java or Kotlin tests for OkHttp-based applications.

    Free plan Android
    7.7 Visit Specs
  15. 15 Imposter
    Windows · macOS · Linux · Self-hosted
    7.6 Visit Specs
  16. 16 WireMock

    WireMock suits developers and test teams that need to work against simulated services or validate contract behavior.

    Free plan Web · Linux · API · Self-hosted
    7.4 Visit Specs
  17. 17 WireMock

    It suits developers, testers and AI coding agents that need simulated APIs for building and validating software.

    Free plan Web · Windows · macOS · Linux
    7.4 Visit Specs
  18. 18 Mirage JS
    Web
    7.3 Visit Specs
  19. 19 Stoplight Prism

    It suits teams developing frontend and backend work in parallel, validating API contracts, or virtualizing services before production.

    Free plan Web · API · Self-hosted
    7.3 Visit Specs
  20. 20 API-Mocked
    Self-hosted
    7.1 Visit Specs
  21. 21 Mock Service Worker
    Web · Self-hosted
    7.1 Visit Specs
  22. 22 OpenAPI Server
    API · Self-hosted
    7.0 Visit Specs
  23. 23 MockPilot
    Browser extension
    6.9 Visit Specs
  24. 24 OpenAPI Mock
    Windows · Linux · Self-hosted
    6.8 Visit Specs
  25. 25 Pretender.js
    Web
    6.4 Visit Specs
How this list is ordered. Specifiction scores each tool on how fully its maker documents it, whether its prices are published, where the research puts it, the platforms it runs on and whether it can be tried for free (how we rank). Makers can also buy a numbered place (how Specifiction is paid for).

Local deployment, free plans, and paid-from pricing offer further points to weigh. Microcks, Mockzilla, and Parasoft SOAtest are among the options, alongside WireMock and MockServer. Consider which setup and response capabilities you need, and compare the listed details to see how each tool describes its approach to creating and running mocks.

Compare Beeceptor and Mockfly Get a place on this list

More in Developer ToolsThe whole topic →