hoppscotch / hoppscotch
Open-Source API Development Ecosystem • https://hoppscotch.io • Offline, On-Prem & Cloud • Web, Desktop & CLI • Open-Source Alternative to Postman, Insomnia
hoppscotch / hoppscotch
usebruno / bruno
Opensource IDE For Exploring and Testing API's (lightweight alternative to Postman/Insomnia)
MobSF / Mobile-Security-Framework-MobSF
Mobile Security Framework (MobSF) is an automated, all-in-one mobile application (Android/iOS/Windows) pen-testing, malware analysis and security assessment framework capable of performing static and dynamic analysis.
Orange-OpenSource / hurl
Hurl, run and test HTTP requests with plain text.
keploy / keploy
Open-source platform for creating safe, isolated production sandboxes for API, integration, and E2E testing.
metersphere / metersphere
MeterSphere 是新一代的开源持续测试工具，内置 AI 助手，让软件测试工作更简单、更高效，不再成为持续交付的瓶颈。
karatelabs / karate
Test Automation Made Simple
ducaale / xh
Friendly and fast tool for sending HTTP requests
postmanlabs / newman
Newman is a command-line collection runner for Postman
requestly / requestly
Community hub for Requestly API Client — bugs, feature requests, and roadmap. The privacy-first Postman alternative.
cypress-io / cypress-realworld-app
A payment application to demonstrate real-world usage of Cypress testing methods, patterns, and workflows.
stoplightio / prism
Turn any OpenAPI2/3 and Postman Collection file into an API server with mocking, transformations and validations.
schemathesis / schemathesis
Catch API bugs before your users do
foss42 / apidash
API Dash is a beautiful AI-powered open-source cross-platform (Desktop & Mobile) API Client built using Flutter which can help you easily create & customize your HTTP & GraphQL API requests, visually inspect responses and generate API integration code. A lightweight alternative to postman/insomnia.
flawiddsouza / Restfox
Offline-First Minimalistic HTTP & Socket Testing Client for the Web & Desktop
TommyLemon / APIAuto
☔ 敏捷开发最强大易用的接口工具，机器学习零代码测试与 AI 问答、生成代码与静态检查、生成文档与光标悬浮注释，腾讯、华为、SHEIN、传音、工行等使用 ☔ The most advanced tool for HTTP API. Machine learning no-code testing and AI assistant, generating codes and static analysis, generating comments and floating hints. Used by Tencent, Huawei, SHEIN, TRANSSION, ICBC, etc.
microcks / microcks
The open source, cloud native tool for API Mocking and Testing. Microcks is a Cloud Native Computing Foundation incubating project 🚀
Kong / insomnia-mockbin
Insomnia Mockbin is the underlying backend for the API mocks capability of Insomnia. It is built and used by Kong, the author of the open-source Kong Gateway.
unkn0wn-root / resterm
Terminal API client for HTTP, GraphQL, gRPC, WebSocket and SSE. Plain .http files you can diff and version, with scripted tests, workflows, mocks, recorder, and a CLI runner for CI.
AngusKit / AngusTester
AI-native software testing platform — one YAML test language covering API, Web, mobile, messaging, data, and LLM scenarios. Self-hostable.
stepci / awesome-api-clients
List of awesome API clients. Postman and Insomnia alternatives
steinfletcher / apitest
A simple and extensible behavioural testing library for Go. You can use api test to simplify REST API, HTTP handler and e2e tests.
dotnet / dev-proxy
Simulate API failures, throttling, and chaos — all from your command line.
WebFuzzing / EvoMaster
The first open-source AI-driven tool for automatically generating system-level test cases (also known as fuzzing) for web/enterprise applications. Currently targeting whitebox and blackbox testing of Web APIs, like REST, GraphQL and RPC (e.g., gRPC and Thrift).
lakernote / easy-postman
An open-source API debugging and stress testing tool inspired by Postman and a simplified JMeter, optimized for developers with a clean UI and powerful features.
chapar-rest / chapar
Fast, native API client for REST, gRPC, WebSocket and GraphQL. A local-first Postman alternative written in Go: no Electron, no account, no cloud.
apideck-libraries / portman
Port OpenAPI Specs to Postman Collections, inject test suite and run via Newman 👨🏽🚀
alexandrehtrb / Pororoca
An API testing tool with support for HTTP/2 and HTTP/3. Alternative to Postman.
k1LoW / runn
runn is a package/tool for running operations following a scenario.
trueleaf / apiflow
A modern API workspace that works both online and offline — combining API documentation, testing, mock, and AI-powered automation in one lightweight tool
furudo-erika / awesome-postman-alternatives
Awesome API Clients & Postman Alternatives (Open Source, Free, Pro)
serenity-js / serenity-js
A TypeScript-native acceptance testing framework that gives your Playwright Test, WebdriverIO, or Cucumber test suite the architecture it needs to scale.
idavidov13 / agentic-playwright
Production-grade Playwright + TypeScript Scaffold for Agentic Testing. Harness for all major AI coding agents baked in.
Pikopod / pikopod
A sandbox for the third-party APIs you depend on. Built from the provider's spec, it fails on purpose, and it replays the exact failure production hit.
azzaazHui / SmartBear-ReadyAPI-Windows-Suite
SmartBear ReadyAPI 2026 Guide: API Testing Tools for Windows 10 and 11
weihubeats / RustFox
A high-performance, local-first API client & Postman alternative built with Rust, Tauri 2, and Vue 3.高性能、本地优先的 API 调试与测试客户端 (Postman/Insomnia/ApiFox 替代品)，基于 Rust + Tauri 2 + Vue 3 打造。
DuskSwordsmanWrath / Burp-Suite-Professional
Burp Suite Professional for Windows — the complete professional build with every module enabled: HTTP inspection, web security testing, and API analysis, no edition limits after install.