Life & fun · alternatives · 2026

Butler Mock is a tool for generating mock data based on TypeScript interfaces. It allows developers to automatically create realistic test data that matches their type definitions, streamlining the process of setting… Below are 24 products that do a similar job, ranked by how close each is in meaning and then by launch-day votes. Creating mock data using TypeScript interfaces launched in 2023; newer entries below may have overtaken it.

1. 1
   Mockaroo▲354

   A realistic data generator to test your app

   2015 · mockaroo.com · its alternatives →

2. 2
   Mock API Generator▲555

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

   2021 · retool.com · its alternatives →

3. 3
   HTTP Mock – Intercept, debug and mock HTTP(S) with zero setup▲341

   Beautiful, cross-platform & open-source tools for debugging, testing and building with HTTP(S), on Windows, Linux & Mac.

   2019 · httptoolkit.tech · its alternatives →

4. 4
   Pollux▲82

   Fake json data & json server mock API generator with JWT

   2021 · mohammedal-rowad.github.io · its alternatives →

5. 5MO
   Mockit – Open-source app to create and configure HTTP mocked endpoints▲158

   2019 · mockit.netlify.com · its alternatives →

6. 6
   FixtureKit▲31

   Turn TypeScript interfaces into realistic mock data

   Jun 2026 · fixture-kit.vercel.app · its alternatives →

7. 7
   Mock Maker▲93

   Effortless mock APIs for seamless testing & prototyping

   2024 · its alternatives →

8. 8GJ
   Generate JSON mock data for testing/initial app development▲103

   Easily create complex JSON data structures using intuitive templates.

   2023 · jsongenerator.io · its alternatives →

9. 9
   Mockoon – mock REST APIs in seconds▲68

   Mockoon is the easiest and quickest way to run mock REST API servers. No remote deployment, no account required, free, open source and cross-platform.

   2017 · mockoon.com · its alternatives →

10. 10
    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 →

11. 11
    MockThis▲80

    Generate mock data using AI

    2023 · its alternatives →

12. 12MS
    Mocktastic – Simple, Offline mock REST APIs for your entire team▲43

    2018 · mocktastic.com · its alternatives →

13. 13
    Mock Turtle▲72

    GUI approach to generating realistic mock JSON data

    2022 · mockturtle.net · its alternatives →

14. 14
    JSON Generator▲139

    Create mock and sample JSON using a powerful template syntax

    2014 · json-generator.com · its alternatives →

15. 15
    AI-Powered Mock API Generator▲86

    Generate customized, realistic mock data & APIs, via GPT

    2023 · its alternatives →

16. 16
    MockingBot▲82

    A rapid prototyping, design collaboration and handoff tool

    2018 · its alternatives →

17. 17
    Mocktotype▲149

    A simple tool to display your mockups in a browser

    2015 · its alternatives →

18. 18
    Mocklets▲82

    A HTTP-based API simulator to assist parallel development 🛠️

    2018 · mocklets.com · its alternatives →

19. 19
    Types Generator▲61

    Types generator will auto generate TS Interfaces from JSON

    2022 · vineethtrv.github.io · its alternatives →

20. 20MM
    Mocksup, my mockup prototyping & review webapp▲95

    2010 · mocksup.com · its alternatives →

21. 21ST
    Simple tool to generate mock APIs for testing▲25

    2024 · endpts.io · its alternatives →

22. 22
    Mock API Generator▲17

    API Mocks Prototyping

    2020 · mock-api-builder.vercel.app · its alternatives →

23. 23
    Mockden▲12

    Rapid api prototyping & mock data

    2025 · its alternatives →

24. 24
    MockBlast▲11

    Generate 1M+ rows of SQL/Mongo data instantly & fast.

    Jan 2026 · 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 →