Dev tools · alternatives · 2026

Below are 24 products that do a similar job, ranked by how close each is in meaning and then by launch-day votes. A free, open-source, collaborative, mock API launched in 2021; newer entries below may have overtaken it.

1. 1
   MockingBot▲82

   A rapid prototyping, design collaboration and handoff tool

   2018 · its alternatives →

2. 2MO
   Mockit – Open-source app to create and configure HTTP mocked endpoints▲158

   2019 · mockit.netlify.com · its alternatives →

3. 3JH
   JSONator – HTTP endpoints for mock data▲7

   2014 · jsonator.herokuapp.com · its alternatives →

4. 4
   MockAPI Dog▲122

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

   Feb 2026 · mockapi.dog · its alternatives →

5. 5SM
   Silk – Markdown driven API tests▲8

   2016 · medium.com · its alternatives →

6. 6
   The Changelog - #189: JSON API with Yehuda Katz▲66

   Yehuda's start as a programmer and the spec for building API

   2016 · changelog.com · its alternatives →

7. 7
   ezyMock▲81

   Mocking API endpoints has never been easier

   2017 · its alternatives →

8. 8RG
   Rapidmock – Generate a mock API in seconds▲7

   2022 · rapidmock.com · its alternatives →

9. 9
   Mock Maker▲93

   Effortless mock APIs for seamless testing & prototyping

   2024 · its alternatives →

10. 10HW
    HTTPiper – Web tool to create mock HTTP dynamic endpoints▲5

    2021 · httpiper.com · its alternatives →

11. 11
    MockGPT▲11

    A Mock API for Developing and Testing Generative AI Apps

    2024 · mockgpt-3.fly.dev · its alternatives →

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…

    Aug 2026 · getmocktail.com · its alternatives →

13. 13
    JSONing Mock API▲6

    Free and open source fake API for testing and prototyping

    Nov 2025 · jsoning.com · its alternatives →

14. 14MA
    Molten, a modern API framework for Python▲7

    2018 · moltenframework.com · its alternatives →

15. 15
    MockAnAPI▲21

    Your gateway to seamless API mocking and robust development

    2023 · angkajuditogelresmi.com · its alternatives →

16. 16
    Mocknica - AI-Powered Mock API Server▲8

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

    Dec 2025 · mocknica.dev · its alternatives →

17. 17
    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 · its alternatives →

18. 18
    Mock-API▲5

    Simplifying API Mocking for Seamless Development Experiences

    2024 · mock-api.net · its alternatives →

19. 19
    Mockingbot▲3

    Mobile prototyping tool without headache

    2016 · its alternatives →

20. 20OS
    Open-source API-only Builders Forum (beta)▲5

    2022 · youonlygetanapi.com · its alternatives →

21. 21
    FakeURL▲6

    Free online api mocking tool | mock api generator

    2025 · fakeurl.dev · its alternatives →

22. 22
    Mockingbird: Generate mock data streams for your next data project▲7

    2023 · mockingbird.tinybird.co · its alternatives →

23. 23
    MockingBot▲3

    The Missing Wireframing Tool for Mobile

    2016 · its alternatives →

24. 24
    Probe API – Utilities for distributed network testing▲8

    2015 · github.com · its alternatives →

Ranked by how close each launch is in meaning, then by votes. Prices were read from each product’s own site when checked and can change. Refine with your own description →