Awesome Postman alternatives and Awesome Insomnia alternatives (why?).

Criteria: open-source, more than 200 stars and 2 contributors.

If you wish to contribute: start a pull request

• Restfox (repo) - Offline-first web HTTP client

• Hoppscotch (repo) - Open source API development ecosystem

• Firecamp (repo) - Open Source Postman Alternative inspired by VS Code DX

• RecipeUI (repo) - RecipeUI is the Postman alternative with type safety built in

• Bruno (repo) - Opensource IDE For Exploring and Testing APIs

• API Dash - API Dash is a beautiful open-source cross-platform API Client

• ezy (repo) - GUI client for gRPC/gRPC-Web

• Milkman - An Extensible Request/Response Workbench

• Insomnium - Insomnium is a 100% local and privacy-focus open-source API client for testing GraphQL, REST, WebSockets, Server-sent events and gRPC in development/production.

• IntelliJ HTTP Client - Create, edit, and execute HTTP requests directly in the IntelliJ IDEA

• VS Code REST Client (repo) - Send HTTP request and view the response in Visual Studio Code

• RESTClient (Firefox) - A debugger for RESTful web services

• restclient.el (emacs) - HTTP REST client tool for emacs

• verb (emacs) - Organize and send HTTP requests from Emacs

• curl (repo) - Command line tool and library for transferring data with URLs (since 1998)

• HTTPie (repo) - HTTPie CLI: human-friendly HTTP client for the API era

• grpcurl - Like cURL, but for gRPC: Command-line tool for interacting with gRPC servers

• xh - Friendly and fast tool for sending HTTP requests

• HttpRepl (.NET) - Lightweight, cross-platform command-line tool that's supported everywhere .NET Core is supported

• Step CI (repo) - Open-source API Test Automation framework

• Hurl (repo) - Hurl, run and test HTTP requests with plain text.

• Karate (repo) - Test Automation Made Simple

• Tavern (repo) - Automated RESTful API testing

• Venom - Manage and run your integration tests with efficiency

• pyresttest - Python Rest Testing

• runn - runn is a package/tool for running operations following a scenario

• scenarigo - An end-to-end scenario testing tool for HTTP/gRPC server

• Schemathesis (repo) - Specification-centric API testing tool for Open API and GraphQL-based applications

• Dredd - Language-agnostic HTTP API Testing Tool

• k6 (repo) - A modern load testing tool, using Go and JavaScript

• Artillery (repo) - Load testing at cloud-scale