Dev tools · alternatives · 2026

APId is an open-source end-to-end testing framework designed for APIs. It enables developers to test API functionality comprehensively throughout the development lifecycle. The framework provides tools to validate API… Below are 24 products that do a similar job, ranked by how close each is in meaning and then by launch-day votes. APId – the API end to end testing framework has gone open source launched in 2020; newer entries below may have overtaken it.

1. 1
   Apidog▲570

   Development teams often struggle with using multiple tools like Postman and Swagger for API design, development, and testing. This fragmented approach leads to outdated API specs and chaotic collaboration. So we built Apidog: a single, unified API platform for team collaboration. It has a beautiful interface that makes it easy to create API spec, generate request data from API spec, validate responses, create mock data, orchestrate test scenarios, and publish API documentation. Apidog = Postman + Swagger + Mock + JMeter.

   2024 · apidog.com · its alternatives →

2. 2
   ApiHome▲73

   Home of API testing

   2022 · apihome.io · its alternatives →

3. 3
   APIPark▲719

   Your open source AI gateway & API developer portal

   2024 · apipark.com · its alternatives →

4. 4
   I open sourced the CLI of my API Testing Framework▲16

   The main repo for APITrakr, an API testing framework. - apitrakr/packages/cli at main · apitrakr/apitrakr

   2023 · github.com · its alternatives →

5. 5
   New way to test APIs with OpenAPI and Postman▲80

   Port OpenAPI Specs to Postman Collections, inject test suite and run via Newman 👨🏽‍🚀 - apideck-libraries/portman

   2021 · github.com · its alternatives →

6. 6
   Mock API Generator▲555

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

   2021 · retool.com · its alternatives →

7. 7MO
   Mockit – Open-source app to create and configure HTTP mocked endpoints▲158

   2019 · mockit.netlify.com · its alternatives →

8. 8
   Open-source A/B testing framework▲199

   Open Source Feature Flags, Experimentation, and Product Analytics - growthbook/growthbook

   2021 · github.com · its alternatives →

9. 9
   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 →

10. 10ST
    Simple tool to generate mock APIs for testing▲25

    2024 · endpts.io · its alternatives →

11. 11
    API Tester▲209

    The easiest way to test APIs

    2017 · its alternatives →

12. 12
    Developer Experience Portal▲98

    Generate SDKS and documentation in one click

    2018 · apimatic.io · its alternatives →

13. 13
    Swagger Inspector▲141

    Free online tool to test APIs and autogenerate documentation

    2018 · swagger.io · its alternatives →

14. 14
    API Flow Integration Tool▲73

    Powerful tool for API flow integration, testing, prototyping

    2020 · its alternatives →

15. 15
    api.video▲153

    Building the backbone of online video.

    2018 · api.video · its alternatives →

16. 16
    Stoplight – Visual API Tooling▲57

    With Stoplight, you can create OpenAPI descriptions, documentation, and mock servers much faster than other API tools — with no specialized knowledge required — all in one centralized platform.

    2016 · stoplight.io · its alternatives →

17. 17
    API Switch▲95

    Learn API dev while texting

    2024 · its alternatives →

18. 18
    APIEval-20▲121

    An open benchmark for AI agents that test APIs

    May 2026 · resources.kusho.ai · its alternatives →

19. 19
    Octrafic▲130

    Test your APIs in plain English, straight from the terminal

    Mar 2026 · its alternatives →

20. 20
    GatewayD▲93

    Like API gateways, for databases

    2023 · gatewayd.io · its alternatives →

21. 21
    Yaade – An open-source, self-hosted, collaborative API dev environment▲100

    Yaade is an open-source, self-hosted, collaborative API development environment. - EsperoTech/yaade

    2022 · github.com · its alternatives →

22. 22
    APIUtility▲66

    Product manager tool for API testing and bulk transformation

    2023 · its alternatives →

23. 23
    Apisentris▲86

    Instantly build APIs in seconds from your database schema

    2018 · its alternatives →

24. 24
    API store▲51

    2018 · phantombuster.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 →