Dev tools · alternatives · 2026

24 alternatives to SimpleApiTest

API testing simplified: offline-ready, user-friendly

Below are 24 products that do a similar job, ranked by how close each is in meaning and then by launch-day votes. SimpleApiTest launched in 2023; newer entries below may have overtaken it.

1. 1
   API Tester▲209

   The easiest way to test APIs

   2017 · its alternatives →

2. 2
   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 →

3. 3
   ApiHome▲73

   Home of API testing

   2022 · apihome.io · its alternatives →

4. 4
   API_TESTER▲249

   Test your APIs right from the macOS menu bar

   2025 · apps.apple.com · its alternatives →

5. 5
   req▲71

   A lightweight, minimal yet powerful API testing tool

   2022 · npmjs.com · its alternatives →

6. 6
   UserTesters.io▲322

   Earn money for testing websites, right from your couch.

   2018 · 123b.global · its alternatives →

7. 7
   AbTest.io▲122

   A free url shortener with A/B testing features

   2017 · cbsplit.com · its alternatives →

8. 8
   Load-test.io▲99

   Website load testing made easy

   2021 · its alternatives →

9. 9
   ZeroThreat▲98

   World's most intelligent web app & API security scan tool

   2024 · zerothreat.ai · its alternatives →

10. 10
    UserTest.io▲151

    Affordable remote user testing built for rapid user feedback

    2017 · its alternatives →

11. 11
    Karate▲89

    Web-services testing made simple 🥋

    2018 · github.com · its alternatives →

12. 12
    Preflight 2.0▲127

    Automated UI testing for your Websites & Web Apps

    2020 · preflight.com · its alternatives →

13. 13MO
    Mockit – Open-source app to create and configure HTTP mocked endpoints▲158

    2019 · mockit.netlify.com · its alternatives →

14. 14
    HttpMaster▲82

    Simple and practical tool for testing web apps & services

    2018 · httpmaster.net · its alternatives →

15. 15TP
    Test Post/Get endpoints easily from your browser▲57

    2011 · httpposttool.com · its alternatives →

16. 16
    API Explorer▲7

    Test, document, and optimize apis effortlessly

    2025 · apiexplorer.vercel.app · its alternatives →

17. 17
    Assertible▲50

    The easiest way to test and monitor your APIs

    2016 · assertible.com · its alternatives →

18. 18
    Declarative Testing Framework for REST, GraphQL APIs▲45

    :boom: Test REST, GraphQL APIs. Contribute to kiranz/just-api development by creating an account on GitHub.

    2018 · github.com · its alternatives →

19. 19
    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 →

20. 20
    RequestResponse.app▲12

    A simple tool for testing API requests (no account needed)

    2024 · requestresponse.app · its alternatives →

21. 21
    API Flow Integration Tool▲73

    Powerful tool for API flow integration, testing, prototyping

    2020 · its alternatives →

22. 22MS
    Mocktastic – Simple, Offline mock REST APIs for your entire team▲43

    2018 · mocktastic.com · its alternatives →

23. 23
    Proven by Users▲64

    Online UX testing & usability research tool suite

    2021 · provenbyusers.com · its alternatives →

24. 24
    test.io▲1

    Online socket.io testing tool

    2020 · io-tester.herokuapp.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 →