Cost / License
- Free
- Proprietary
Application typeApplication types
Platforms
- Windows




Apps similar to TestMace include Postman, which has a free version. Other options are Insomnia REST Client, Yaak, Hoppscotch and HTTP Toolkit. You're spoiled for choice with API Clients like TestMace: we list more than 50 alternatives for Mac, Windows, Linux, the web and Chrome OS.








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.



Upcoming API testing tool in beta, built in GoLang, supporting HTTP/gRPC, workspaces, environments, request management, and various content types. Features include dark mode, local data storage, Postman import, environment variable setting, and request chaining.




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

Design and debug APIs in a powerful visual editor. Describe and debug easily with JSON Schema support. Apidog is a complete set of tools that connects the entire API lifecycle, helping R&D teams implement best practices for API Design-first development.




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.






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.




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.


Kreya is a GUI client for gRPC, REST and WebSocket APIs with innovative features for environments, authorizations and more.



