mockoon alternatives

12 Windows apps in the same category as mockoon, ranked by what they have in common and by popularity.

• 
  Bruno

  Opensource IDE For Exploring and Testing API's (lightweight alternative to Postman/Insomnia)

  Open source 4.3.0 124.3K ↓ ★ 47.8K api, rest-api, foss
• 
  Insomnia

  The Desktop API client for REST and GraphQL. Make requests, inspect responses.

  Open source 13.4.0 153K ↓ ★ 40.1K rest, api, rest-api
• 
  HTTPie

  HTTPie for Web & Desktop — cross-platform API testing client for humans. Painlessly test REST, GraphQL, and HTTP APIs.

  Free 2025.2.0 65.8K ↓ ★ 4.1K rest, api, foss
• 
  Yaak

  The most intuitive desktop API client. Organize and execute REST, GraphQL, WebSockets, Server Sent Events, and gRPC.

  Open source 2026.9.1 19.2K ↓ ★ 19.3K foss
• 
  ARMClient

  A simple command line tool to invoke the Azure Resource Manager API

  Open source 1.9 102.1K ↓ ★ 339 rest, api
• 
  RenderDoc

  A stand-alone graphics debugging tool

  Open source 1.47.0 4.9K ↓ ★ 11.2K
• 
  SoapUI

  An advanced API testing utility.

  Open source 5.10.0 659.2K ↓ rest, api, rest-api
• 
  Altair GraphQL Client

  A beautiful feature-rich GraphQL Client for all platforms.

  Open source 8.5.11 20.1K ↓ ★ 5.4K
• 
  Hurl

  Hurl is a command line tool that runs HTTP requests defined in a simple plain text format.

  Open source 8.0.1 7.8K ↓ ★ 19.3K
• 
  ResponsivelyApp

  A modified browser built using Electron that helps in responsive web development.

  Open source 1.18.0 7.4K ↓ ★ 25.4K
• 
  JACK2

  JACK2 aka jackdmp is a C++ version of the JACK low-latency audio server for multi-processor machines. It is a new implementation of the JACK server core features that aims at removing some limitations of the JACK1 design.

  Open source 1.9.22 35K ↓ ★ 2.5K api
• 
  xh

  Friendly and fast tool for sending HTTP requests

  Open source 0.26.3 4.2K ↓ ★ 8.1K rest, api

Comparison

App	Licence	Version	Updated	GitHub stars	Chocolatey downloads
Mmockoon	Open source	9.10.0	November 1, 2026	—	38.3K
Bruno	Open source	4.3.0	October 22, 2026	47.8K	124.3K
Insomnia	Open source	13.4.0	October 29, 2026	40.1K	153K
HTTPie	Free	2025.2.0	March 14, 2025	4.1K	65.8K
Yaak	Open source	2026.9.1	November 2, 2026	19.3K	19.2K
ARMClient	Open source	1.9	July 16, 2025	339	102.1K
RenderDoc	Open source	1.47.0	October 31, 2026	11.2K	4.9K
SoapUI	Open source	5.10.0	June 2, 2026	—	659.2K
Altair GraphQL Client	Open source	8.5.11	October 10, 2026	5.4K	20.1K
Hurl	Open source	8.0.1	April 29, 2026	19.3K	7.8K
ResponsivelyApp	Open source	1.18.0	February 16, 2026	25.4K	7.4K
JACK2	Open source	1.9.22	December 5, 2024	2.5K	35K
xh	Open source	0.26.3	October 21, 2026	8.1K	4.2K