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Dev tools · alternatives · 2026

24 alternatives to Mock Studio

Hi HN, I built this after using Requestly, Mokku, Mockiato, Tweak, and Mockoon. Each one either paywalled the features I actually needed, required a separate server running on my machine, or just didn't fit the way I work. The browser is already open. DevTools is already open. I wanted the mocking to live there too, not in a separate app I have to remember to start. So roughly a month ago, I started building my own tools. It intercepts network requests at the browser level and lets you swap the response, status code, headers, body without touching your code or spinning up anything.…

Below are 24 products that do a similar job, ranked by how close each is in meaning and then by launch-day votes.

  1. 1

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

    2019 · httptoolkit.tech · its alternatives →

  2. 2MO
  3. 3

    A HTTP-based API simulator to assist parallel development 🛠️

    2018 · mocklets.com · its alternatives →

  4. 4
    Mockaroo▲354

    A realistic data generator to test your app

    2015 · mockaroo.com · its alternatives →

  5. 5

    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 →

  6. 6

    A rapid prototyping, design collaboration and handoff tool

    2018 · its alternatives →

  7. 7

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

    2021 · retool.com · its alternatives →

  8. 8

    Effortless mock APIs for seamless testing & prototyping

    2024 · its alternatives →

  9. 9

    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 →

  10. 10MS
  11. 11
    Mockoon▲89

    Mock servers in seconds

    2017 · mockoon.com · its alternatives →

  12. 12

    A simple tool to display your mockups in a browser

    2015 · its alternatives →

  13. 13

    Api management and testing platform for remote teams.

    2020 · mocklets.com · its alternatives →

  14. 14IB

    Hi HN, After watching a lot of Show HN's here, it's finally my turn to show something. This is the first real project I have shipped, so it is extra special to me. For those who will inevitably ask why I made yet another mockup editor I covered it on our blog (http://blog.mocktailsapp.in/why-build-yet-another-mockup-editor-tm). Not all the features mentioned in that post have been implemented yet. As such Mocktails is pre-beta software and very minimal. It does not even have user accounts or any actual server side component at all for that matter (yet)! Our intention is to build Mocktails…

    2012 · blog.mocktailsapp.in · its alternatives →

  15. 15

    Your playground for writing custom API security tests

    2023 · akto.io · its alternatives →

  16. 16

    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 →

  17. 17
    Decoy▲99

    Decoy lets developers create mock services locally on macOS. Test webhooks, API wrappers, scrapers and more. No Docker, no Electron, just a beautiful 10 MB native app.

    Mar 2026 · decoy-app.com · its alternatives →

  18. 18

    Fake server, Consumer Driven Contracts and help with testing performance from one configuration file with zero system dependencies and no coding whatsoever - quii/mockingjay-server

    2015 · github.com · its alternatives →

  19. 19MA

    Hi all, this is my latest side project: MockingBot, it's a pure JS/HTML based online iOS mockup tool. It only supports iPhone at now, but iPad will be added soon. http://mockingbot.com we build this tool mainly for UI/UX designers and project managers, but as I'm a developer, so I'm glad to hear your opinions about our product and i'll be very appreciate if you can help answering below question: which prototype tool do you use to mock-up your mobile app? and which feature attract you most? any comments are welcome.

    2012 · mockingbot.com · its alternatives →

  20. 20MM
  21. 21

    Mock your HTTP responses to test your REST API

    2016 · its alternatives →

  22. 22
    Pollux▲82

    Fake json data & json server mock API generator with JWT

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

  23. 23

    Free mock api generator for developers | instant test data

    Nov 2025 · fakeapifordevs.vercel.app · its alternatives →

  24. 24

    Simplifying API Mocking for Seamless Development Experiences

    2024 · mock-api.net · its alternatives →

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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 →