Growth · alternatives · 2026

WcfStorm is a test client for REST services and WCF web services. It is designed for developers who need to test and debug their APIs. The software includes features like syntax highlighting for JSON, intellisense for… Below are 24 products that do a similar job, ranked by how close each is in meaning and then by launch-day votes. I've built a REST Test client in my spare time launched in 2012; newer entries below may have overtaken it.

1. 1
   Restfox – Open source lightweight alternative to Postman▲758

   Last time I posted this it didn't garner much interest. There have been lots of improvements and fixes since the last release. Quick list of features: - Workspaces - Tabs - Nested Folders - Lots of context menus - Response history - Plugins - Runs fully in the browser and runs offline if necessary - Chrome and Firefox extension to bypass CORS restrictions - Desktop builds for all platforms - GraphQL support - Import collections exported from Postman and Insomnia - Simple user friendly interface I built this because I love Insomnia but wanted a portable version that I could run in the…

   2022 · restfox.dev · 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
   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 This fragmented approach leads to outdated API specs and chaotic collaboration.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 →

4. 4
   I made a JSFiddle-style playground to test and share prompts fast▲50

   I built this out of frustration as I lead the development of AI features at Yola.com. Prompt testing should be simple and straightforward. All I wanted was a simple way to test prompts with variables and jinja2 templates across different models, ideally somthing I could open during a call, run few tests, and share results with my team. But every tool I tried hit me with a clunky UI, required login and API keys, or forced a lengthy setup process. And that's not all. Then came the pricing. The last quote I got for one of the tools on the market was $6,000/year for a team of 16 people in a…

   2025 · langfa.st · its alternatives →

5. 5
   Insomnia REST Client now open-source▲218

   Leading Open Source API Development Platform for HTTP, REST, GraphQL, gRPC, SOAP, and WebSockets

   2017 · insomnia.rest · its alternatives →

6. 6
   Shortwave: Enjoy Your Inbox▲224

   I’m thrilled to finally be able to show everyone what we’ve been working on for the last 2 years. We’re re-inventing the email experience to help you email smarter and faster, so you can get more done, and maybe even actually enjoy your inbox. When we launched Firebase here 10 years ago, HN was tough but fair, and I expect no less this time around! I hope you’ll check out what we’ve built and share your feedback. I’ll be around here all day and am happy to answer any questions. Let us know what you think!

   2022 · shortwave.com · its alternatives →

7. 7
   Cross Platform .NET Desktop Application Framework▲129

   Making Web Testing Easier Automated testing on 3000+ desktop & mobile browser at Studio version! Making Web Testing Easier Automated testing on 3000+ desktop & mobile browser at Studio version! Explore product trial and special offers Download TRIAL version to start your full 1 day evaluation now! M

   2017 · browseemall.com · its alternatives →

8. 8
   Yaak – An open source, Git-friendly desktop API client▲153

   Hi HN! I'm Greg and I've been working on Yaak for just over a year. I usually describe it as a Postman alternative since most developers are familiar with that, but it's targeted more toward users that just want an API client (no mocking, testing, spec design, etc). Having also created Insomnia for a similar purpose, I never thought I'd build another API client again. But, after selling Insomnia in 2019 and watching it expand into the broader feature set of Postman, I was left wanting a simpler tool again. Yaak was my answer to that. It's hard to describe how it's better than the 100 other…

   2025 · yaak.app · its alternatives →

9. 9
   LambdaTest▲127

   Ensure your web-apps work seamlessly across all browsers.

   2018 · testmuai.com · its alternatives →

10. 10IB
    I built a mockup/prototype/wireframe editor in ten weeks▲42

    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 →

11. 11IW
    I wrote a book about using Lambda with Go▲103

    Hi HN! During the last few years, I worked on a few applications built with Go, running on AWS Lambda. As I got to know the platform better, I started to find Go & Lambda to be a really productive combination. The applications were fast, and they ended up being much cheaper to run than what my team & I had built before. It’s probably not the best platform for _every_ application, but I was surprised at how much of our workload worked well on it. As we brought new engineers on to our team and helped them get up to speed with the stack, I found that we were covering a lot of the same topics…

    2021 · its alternatives →

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

    2018 · mocktastic.com · its alternatives →

13. 13
    Motty▲70

    Modern and simpler way to test client services

    2017 · scalalang2.com · its alternatives →

14. 14
    Fetch Client▲78

    REST client extension for VS code, alternative to Postman

    2022 · marketplace.visualstudio.com · its alternatives →

15. 15TR
    Testing RESTful services▲13

    2018 · medium.com · its alternatives →

16. 16
    Restfox▲69

    Browser based HTTP client inspired by Insomnia and Postman

    2022 · restfox.dev · its alternatives →

17. 17
    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 →

18. 18
    ChunkBack – A Fake LLM API server for testing apps without paying▲6

    Hi HN, I've been working with LLMs in production for a while both as a solo dev building apps for clients and working at an AI startup. The one thing that always was a pain was to pay OpenAI/Gemini/Anthropic a few dollars a month just for me to say "test" or have a CI runner validate some UI code. So I built this server called ChunkBack, that mocks the popular llm provider's functionality but allows you to type in a deterministic language: `SAY "cheese"` or `TOOLCALL "tool_name" {} "tool response"` I've had to work in some test environments and give good results for experimenting…

    Nov 2025 · github.com · its alternatives →

19. 19
    SprintZen▲48

    Hey HN, we're launching SprintZen – an AI-powered test case management platform that helps teams write, organize, and sync tests without the mess. It generates test cases from user stories or PRs, integrates with Jira, Linear, and Monday, and auto-reports bugs. We built this after working with 15+ startups (YC-backed and others) and seeing how painful test maintenance can get. Would love your feedback. To try this out you can create your account here - https://on.sprintzen.app/login

    2025 · sprintzen.app · its alternatives →

20. 20JF
    JSFiddle for HTTP requests▲10

    2017 · rest.secapps.com · its alternatives →

21. 21ML
    Multiple – Load test any API with JavaScript and NPM packages▲38

    Hey HN, I wanted a better load testing solution – so I built one with my team at Multiple. We just opened early access and would love to get your feedback. We created Multiple to solve three challenges with existing tools: 1. Limited scripting capabilities. XML or GUI-based scripting can only test basic scenarios. Existing code-based tools struggle with auth, generating synthetic data, and testing anything other than HTTP requests. We went with JavaScript for ease of use, versatility, and integration with existing developer workflows. 2. Cannot use existing libraries or code. Instead of…

    2023 · app.multiple.dev · its alternatives →

22. 22
    Open-source cypress for back end testing▲22

    For the past few months we’ve been building a simple jest/typescript-based high-level language for writing and running integration tests. We're open-sourcing it now and are excited to share it with you: https://github.com/traceloop/jest-opentelemetry Why we built this: - There are many solid frameworks for FE / browser testing, but none with high-level constructs for testing BE flows - We were missing a way to validate side effects for complex backend systems, especially across async queueing systems Our beta version lets you send an API call to a system and…

    2023 · github.com · its alternatives →

23. 23LL
    LambdaTest launched on Product Hunt▲39

    2018 · producthunt.com · its alternatives →

24. 24
    Skybear.net – A managed platform automating Synthetic HTTP API testing▲6

    Hey folks, I am finally posting a Show HN post for a project I have been working on for several months now, and it's in a state where I already get a lot of value myself, so I am happy to share broadly. The pitch line is: "Skybear.NET is a managed platform automating Synthetic HTTP API testing." At the moment, the main source file format supported for your API tests are Hurl.dev files [1]. Hurl is a CLI tool wrapping `curl` and it's really awesome. At least check that out :) I am not affiliated directly with the Hurl CLI tool, and the platform I am building provides full Hurl compatibility.…

    2024 · skybear.net · 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 →