Alternatives to Mockoon

A desktop app and CLI for designing and running mock REST APIs locally without an account. The listings below can replace it for an important use case. Each note says what changes if you switch.

Replacements

Listings that take over the same core job as Mockoon.

  • WireMock

    An open-source tool for mocking HTTP APIs so you can test without real service dependencies.

    FreemiumOpen sourceWebSelf-hostedCommand line

    WireMock adds flexible matching, templating, record and playback and fault simulation, running standalone, in Docker or embedded in tests, but without a desktop GUI and needing Java or Docker.

  • MockServer

    An open-source self-hosted server for mocking, proxying and recording HTTP, HTTPS and gRPC APIs.

    FreeOpen sourceSelf-hostedCommand line

    MockServer is a self-hosted server that mocks and proxies HTTP up to HTTP/3 plus gRPC, with fault injection, configured rather than designed in a desktop app.

  • Prism

    An open-source mock server and validation proxy built from OpenAPI documents and Postman collections.

    FreeOpen sourceCommand line

    Prism generates a mock server directly from an OpenAPI file and adds a validation proxy, but is command-line only and depends on an accurate specification.

  • json-server

    A command-line tool that turns a JSON file into a fake REST API for prototyping.

    FreeProprietaryWindowsmacOSLinuxCommand line

    json-server turns a single JSON file into a fake REST API with one npm command, simpler than Mockoon but aimed only at prototyping and still in beta.

  • Beeceptor

    A web service for creating mock API servers and inspecting incoming webhook requests in real time.

    FreemiumProprietaryWeb

    Beeceptor hosts mock servers on a unique subdomain with dynamic responses and imports several definition formats, but requests pass through a third party.

  • Mockbin

    A free web tool that creates mock API endpoints with fixed responses and logs requests to them.

    FreeOpen sourceWeb

    Mockbin creates hosted mock endpoints with fixed responses from OpenAPI documents without an account, but lacks programmable logic and local running.

  • Stoplight

    A web platform for designing OpenAPI descriptions, generating API documentation and running mock servers.

    FreemiumProprietaryWeb

    Stoplight generates mock servers from OpenAPI descriptions alongside design and docs hosting, but it is a hosted service requiring an account.

  • Apidog

    An API platform for designing, debugging, mocking and testing APIs, with desktop and web clients.

    FreemiumProprietaryWeb

    Apidog includes mocking within a closed-source platform for API design, debugging and testing, heavier than a dedicated mock tool.

Similar software

Related functionality, not a direct replacement.