The top-rated alternative to Postman is Insomnia REST Client, which is open source with a free version. People also recommend Hoppscotch, HTTPie for Terminal, Bruno and soapUI. You're spoiled for choice with API Clients like Postman: we list more than 100 alternatives for Windows, Mac, Linux, the web and self-hosting.
Ain is a command-line HTTP API client. It's an alternative to postman, paw or insomnia. It enables scripting of input and further processing of output. It targets command-line users who work with API:s using a simple file format.
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Api Quest is a desktop application designed for executing HTTP requests, storing them on the local file system, and providing portability. Whether you're a developer, QA or system engineer, this tool offers solution for handling HTTP requests effectively.
gRPC is a modern open source high performance Remote Procedure Call (RPC) framework that can run in any environment. It can efficiently connect services in and across data centers with pluggable support for load balancing, tracing, health checking and authentication.
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AirMQTT is a native MQTT client that helps you monitor topics, publish messages, and manage multiple MQTT connections with a fast, focused workflow.
Build, test, and debug your APIs with a self-hosted tool that does what you actually need. Scripts, environments, OAuth 2.0, code generation, and an AI wizard that builds collections from your docs — no account required, no limits.
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Keep your http requests in a single file that lives in your projects repo. This app lets you run your http requests from a .http file and includes features like load testing, pre and post request scripts, and request chaining.
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Zaku is a native Rust, local-first, open-source API client engineered for speed and productivity.
Slumber is a TUI (terminal user interface) HTTP client. Define, execute, and share configurable HTTP requests.
