Hoppscotch is an open-source API client with web, desktop and command-line options. Its personal workspace supports request collections, environments and tests. Hosted team collaboration has separate paid plans.
Mock Service Worker vs Postman
How do Mock Service Worker and Postman compare? Here are the facts side by side: pricing, platforms, open-source status and what each one is for.
| Directory detail | Mock Service Worker | Postman |
|---|---|---|
| What it is | A JavaScript API mocking library that shares request handlers between browser development and automated tests. | Postman is an API development platform for sending requests, inspecting responses and maintaining collections and environments. Its Free plan covers individual API work, while shared team workflows and some automation features use paid plans. |
| Website | ||
| Type | Online tool | Website |
| Topic | ||
| Pricing | Free | Freemium |
| Platforms | Not recorded | Web, Windows, macOS, Linux |
| Open source | Yes | Not stated |
| Language | — | — |
| Alternatives |
Other options to consider
Sites similar to both Mock Service Worker and Postman.
Bruno is an API client that stores collections as local files for use with Git and other version-control workflows. The open-source edition handles personal request testing and collection runs; paid editions add integrations and in-app conveniences.
An open-source HTTP mocking server for request matching, simulated responses and automated integration tests.
Compose and send HTTP requests with this REST testing interface, which includes method, endpoint, and request options.
HTTPie provides API testing clients for the terminal and desktop, with documentation and request workflows.



