Alternatives

Products that do what Contractr does

Spin up a mock API server in under 2 minutes - no backend.

1. 1
   Mock API Generator▲548

   Generate custom data & API to build apps in less than 30s

   2021

2. 2
   Mockable▲114

   For rapid API prototyping: create REST/SOAP mocks in 3 sec

   2015

3. 3
   MockAPI Dog▲122

   Instant mock REST & LLM APIs - free, no signup required

   Feb 2026 · mockapi.dog

4. 4
   Mockadillo▲115

   Mock your entire API in minutes.

   2019

5. 5
   Gigster 2.0▲458

   Hire a development team in 5 minutes

   2015

6. 6MM
   Mockoon – mock REST APIs in seconds▲68

   2017 · mockoon.com

7. 7
   Mocklets▲82

   A HTTP-based API simulator to assist parallel development 🛠️

   2018

8. 8OM
   OpenAPI mocks that don't suck – realistic test data, quick setup▲13

   Hi HN! I'm Ankit, the founder of Beeceptor, a request mocking and intercepting tool. This time, I built something new to address a pain I’ve personally felt (and heard from dozens of QA, frontend, and platform teams): making OpenAPI specs actually useful during development. API contracts just sit around as docs often. What if you could 'activate' them, instantly have a realistic, hosted mock server-with contract validation, smart test data, and early usage? So I made _Mockaroo for OpenAPI_, but with brains. It spins up a hosted mock server from your spec in one click. It: - Generates…

   2025 · beeceptor.com

9. 9
   Mockoon▲89

   Mock servers in seconds

   2017

10. 10MO
    Mockit – Open-source app to create and configure HTTP mocked endpoints▲158

    2019 · mockit.netlify.com

11. 11
    Mock Maker▲93

    Effortless mock APIs for seamless testing & prototyping

    2024

12. 12
    Mocktail – Free, open-source mock API server with a built-in dashboard▲25

    Hi HN, I built the first version of Mocktail years ago. I recently came back to the project, and after a pretty substantial rebuild, v4 is now out. Mocktail is a free and open-source, self-hosted mock API server with a built-in dashboard and database, packaged as a single ~25 MB binary. You can run it locally or on your own infrastructure — no account or hosted service required. You can define endpoints and responses, generate realistic data per request, customize headers, status codes and latency, and inspect incoming requests in real time. With v4, I also added MCP support, so coding…

    23d ago · getmocktail.com

13. 13
    sampleapp.ai▲160

    Self-serve API & SDK onboarding—in 60 seconds. Skip docs.

    2025

14. 14
    Visual Swagger Editor for Teams▲89

    Link your app design to API calls

    2022

15. 15
    Mockphine▲87

    Mock blocked APIs, passthrough ready routes, see live source

    Mar 2026 · mockphine.com

16. 16
    APInexis — Mock API Platform▲2

    Schema to live API in 60 seconds. No backend needed.

    May 2026 · apinexis.web.app

17. 17
    Decoy▲99

    Local server mocks in macOS, all in a lightweight native app

    Mar 2026 · decoy-app.com

18. 18
    ApiHome▲73

    Home of API testing

    2022

19. 19
    Mocknica - AI-Powered Mock API Server▲8

    Create mock APIs in seconds with AI. Ship prototypes faster.

    Dec 2025

20. 20
    Mock Server▲4

    Swagger to Mock Backend Instantly. Build Faster with AI.

    Jan 2026

21. 21
    MockCraft▲2

    Turn real API calls into smart mock endpoints

    Apr 2026 · mock-craft.com

22. 22ST
    Simple tool to generate mock APIs for testing▲25

    2024 · endpts.io

23. 23
    API Fast Mock▲6

    Stateless API mocks in seconds, powered by tokens.

    Sep 2025

24. 24
    apimock-rs▲9

    A developer-friendly, fast and functional HTTP(S) server.

    Nov 2025

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