Life & fun · alternatives · 2026

24 alternatives to Stubby – better client side mocking of HTTP Requests

Stubby is a small library for stubbing client-side AJAX requests, primarily designed for use in front end tests.

Below are 24 products that do a similar job, ranked by how close each is in meaning and then by launch-day votes. Prices are shown for the 1 we have checked on their own sites, 1 of them free or with a free tier. Stubby – better client side mocking of HTTP Requests launched in 2015; newer entries below may have overtaken it.

1. 1SS
   StubOnWeb – Stub HTTP server to test API integrations▲25

   2015 · stubonweb.herokuapp.com · its alternatives →

2. 2
   StubBin▲7

   Intelligent, ephemeral API mocking with dynamic logic.

   Jan 2026 · 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. 4FE
   Front-end framework optimized for internal apps▲438

   2014 · getflakes.com · its alternatives →

5. 5
   HTTPretty, an easy way to mock http requests in python▲97

   Bid on the RGP-Domain falcao.it. Bid now from €10 and secure the domain at an early stage!

   2012 · falcao.it · its alternatives →

6. 6
   Mocklets▲82

   A HTTP-based API simulator to assist parallel development 🛠️

   2018 · mocklets.com · its alternatives →

7. 7
   FetchSandboxfree tier, from $5/mo▲348

   API integration testing that remembers what breaks

   Jul 2026 · fetchsandbox.com · its alternatives →

8. 8
   Hurl – Run and test HTTP requests with plain text, curl and Rust▲223

   Hurl, run and test HTTP requests with plain text and curl. Hurl can run fast automated integration tests.

   2021 · hurl.dev · its alternatives →

9. 9
   Fetchbook – Run and test your HTTP requests 100% locally▲59

   Run and test your HTTP requests. Git friendly, 100% local. - 4lejandrito/fetchbook

   2023 · github.com · its alternatives →

10. 10
    Interceptor – mock AJAX requests at the browser level▲60

    Introducing Interceptor - A browser extension that mocks backend responses and how to use it.

    2018 · crypt.codemancers.com · its alternatives →

11. 11MO
    Mockit – Open-source app to create and configure HTTP mocked endpoints▲158

    2019 · mockit.netlify.com · its alternatives →

12. 12
    Stubs▲77

    The no-code page builder for web3

    2023 · stubs.world · its alternatives →

13. 13
    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 →

14. 14
    Fetch Client▲78

    REST client extension for VS code, alternative to Postman

    2022 · marketplace.visualstudio.com · its alternatives →

15. 15
    HTTPDump▲94

    Inspect HTTP requests, compare them or mock response

    2021 · dashcards.io · its alternatives →

16. 16HI
    Hurl.it is back – Make HTTP Requests▲73

    2021 · hurlit.com · its alternatives →

17. 17
    StubCraft▲6

    A tool designed to create mock APIs

    2024 · stubcraft.com · its alternatives →

18. 18
    Motty▲70

    Modern and simpler way to test client services

    2017 · scalalang2.com · its alternatives →

19. 19
    a tool for inspecting HTTP callbacks in realtime▲21

    2013 · webhookinbox.com · its alternatives →

20. 20
    Mockoon▲89

    Mock servers in seconds

    2017 · mockoon.com · its alternatives →

21. 21
    apimock-rs▲9

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

    Nov 2025 · apimokka.github.io · its alternatives →

22. 22
    Niquests – a simple HTTP library, a drop-in replacement for Requests▲44

    Drop-in replacement for Requests. Automatic HTTP/1.1, HTTP/2, and HTTP/3. WebSocket, and SSE included. WASI Supported. - niquests/README.md at main · jawah/niquests

    2024 · github.com · its alternatives →

23. 23
    We’re open-sourcing Requestly - HTTP debugging proxy for Web and Mobile▲54

    Hey HN! We’ve open-sourced Requestly (https://github.com/requestly/requestly) - A network debugging proxy for web & mobile apps. Requestly intercepts all HTTP(s) requests & responses and provides full control to developers to modify the request/response like rewriting request URL to hit different environment or returning different response for APIs/scripts. In addition to HTTP(s) interception & modification capabilities, Requestly also offers Mock Server [0] & recording the browser sessions [1] with video, console logs, & network logs stitched together. We use…

    2023 · github.com · its alternatives →

24. 24
    Mockingjay – Fake servers and consumer-driven contracts▲39

    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 →

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 →