1
Same kind of online tool
An open-source HTTP mocking server for request matching, simulated responses and automated integration tests.
Alternatives
The Best Mock Service Worker Alternatives in 2026
7 alternatives5 free · 4 open source
Looking for something like Mock Service Worker? Here are 7 alternatives, ranked by how closely they match it on purpose, features and platforms. Of these, 5 are free or have a free plan and 4 are open source.
About Mock Service Workermswjs.io
VisitA JavaScript API mocking library that shares request handlers between browser development and automated tests.
Top picks at a glance
First suggestionWireMockAn open-source HTTP mocking server for request matching…Another optionMockServerAn HTTP mocking and proxy server with request expectations…
Quick comparison
| # | Alternative | Pricing | Open source | Platforms |
|---|---|---|---|---|
| 1 | WireMock | Free | Yes | — |
| 2 | MockServer | Free | Yes | — |
| 3 | HTTPie | — | Not stated | Web |
| 4 | Rest Test Test | — | Not stated | Web |
| 5 | Postman | Freemium | Not stated | Web, Windows, macOS |
| 6 | Bruno | Freemium | Yes | Windows, macOS, Linux |
| 7 | Hoppscotch | Freemium | Yes | Web, Windows, macOS |
All Mock Service Worker alternatives
2
Same kind of online tool
An HTTP mocking and proxy server with request expectations, response configuration and verification APIs.
3
HTTPie
httpie.ioSame kind of online tool
HTTPie provides API testing clients for the terminal and desktop, with documentation and request workflows.
4
Rest Test Test
resttesttest.comSame kind of online tool
Compose and send HTTP requests with this REST testing interface, which includes method, endpoint, and request options.
5
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.
6
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.
7
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.
No alternatives match this filter.
Alternatives to similar tools
Bruno10 alternativesRest Test Test9 alternativesPostman10 alternativesWireMock12 alternativesMockServer11 alternativesHTTPie10 alternatives
TopicAPIs & Databases · 93 sites Best-of listBest Free API Testing Tools for Individual Developers ListingMock Service Worker details
What is the best alternative to Mock Service Worker?
Based on features, tags and platforms, the closest alternatives to Mock Service Worker are WireMock, MockServer, and HTTPie.
Is there a free alternative to Mock Service Worker?
Yes. WireMock, MockServer, and Postman are free or offer a free plan.
Are there open-source alternatives to Mock Service Worker?
Yes: WireMock, MockServer, Bruno, and Hoppscotch.
Alternatives are suggested from the purpose and features described in our listings. Different pages for the same product appear once. Read each description to check whether it fits your task. How we choose alternatives · Suggest an alternative