The API Astrolab enables today’s API-first companies to show their API products in a visual way so that anyone can understand how they work.
Cost / License
- Freemium
- Proprietary
Platforms
- Online
- Software as a Service (SaaS)



Step CI is described as 'Open-source API Test Automation framework' and is an app in the development category. There are more than 50 alternatives to Step CI for a variety of platforms, including Mac, Windows, Linux, Web-based and Flathub apps. The best Step CI alternative is Bruno, which is both free and Open Source. Other great apps like Step CI are Postman, Insomnia REST Client, Hoppscotch and HTTPie for Terminal.
The API Astrolab enables today’s API-first companies to show their API products in a visual way so that anyone can understand how they work.



RecipeUI is rethinking how we use API tools like Postman or Insomnia. We're starting off with TypeScript powered API requests and API collections you can run in seconds!

A free, open-source Postman-style API tester you run locally. Record browser requests, auto-generate chained tests, and ship them straight to your CI—no sign-ups, no cloud, just code.










Hurl is a command line tool that runs HTTP requests defined in a simple plain text format. It can capture values, evaluate queries on headers and body response. It is very versatile: it can be used for both fetching data and testing HTTP sessions.



Stoplight is an API Design, Development, and Documentation platform that enables consistency, reusability, and quality, all with an easy, enjoyable developer experience.

Treblle is a federated API Intelligence platform delivering full API visibility, security, and control from one integration point.



ArdorQuery is a cross-platform tool for performing any HTTP(S) endpoints like REST API, HTML, Images, GraphQL, OData etc.

gRPC is a modern open source high performance Remote Procedure Call (RPC) framework that can run in any environment. It can efficiently connect services in and across data centers with pluggable support for load balancing, tracing, health checking and authentication.

Thunder Client is a hand-crafted lightweight Http Client extension for Visual Studio Code. No separate download needed, Just install the extension from VS Code marketplace.


Native desktop app for Windows offers high-performance REST and HTTP API testing, low memory and CPU use, custom methods, portable version, proxy support, multiple environments, code generation, multilingual interface, and import/export in light or dark themes.



