The most intuitive desktop API client. Organize and execute REST, GraphQL, WebSockets, Server Sent Events, and gRPC 🦬
Design, Test, Document APIs, in plain Markdown. Compose APIs with blocks. Reuse, Replace & Version everything just like code. Truly Git Native. No Lock-in.
Awesome API Clients & Postman Alternatives (Open Source, Free, Pro)
A text-based HTTP client in the browser. An interface-less Postman.
Lightweight file-based API client for terminal nerds
API client for code-first teams. Test, automate, and observe APIs from .http files.
A developer and git friendly offline-only API client designed for efficient API testing and development. It stores the collections and requests as YAML files on your local file system, making it convenient to organize, reuse, and share your APIs. (Alternative to Postman and Insomnia)
High-Performance API Testing Platform
Postman-grade API client for every developer — local-first, git-friendly collections, built-in load testing, unlimited history
RESTUI API Client In Your Terminal
Fast, lightweight, privacy-focused API client. No sign-up required.
A colorful, lightweight command-line HTTP client similar to Postman. Built with Go for fast performance and beautiful terminal output.
A lightweight, open-source API client built with React and TypeScript. Features collections, environments, cURL/Postman/OpenAPI import, multi-tab interface, and dark/light themes.
Self-hosted, web-based REST API client. A lightweight Postman alternative for teams. No desktop install, no data leaves your network.
RestFlow is a lightweight, minimal web based REST client built on Sveltekit, inspired by tools like Thunder Client and Postman — but focused on speed, simplicity, and zero bloat.
A modern, lightweight, self-hostable API client. No accounts, no cloud, no telemetry.
A modern, feature-rich API client and testing studio for developers. Build, test, and debug APIs with an intuitive interface.
pyapptest is a developer-friendly, plug-and-play API testing utility built with Python. It helps you auto-detect, test, and document API endpoints from popular frameworks like FastAPI, Flask, and Django — all within a clean Streamlit-based interface.
The professional, privacy-focused alternative to Postman. 100% local, scriptable, and built with pure Java for maximum efficiency.
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