RESTer is described as 'A REST client for almost any web service (Firefox and Chrome extension)' and is a API Client in the web browsers category. There are more than 50 alternatives to RESTer for a variety of platforms, including Mac, Windows, Linux, Web-based and Flathub apps. The best RESTer alternative is Postman, which is free. Other great apps like RESTer are Insomnia REST Client, Yaak, Hoppscotch and ApiArk.
Postman is a collaborative platform for API development that provides extensive tools for designing, testing, and documenting APIs. It allows API verification through requests, automated testing via Collection Runner, and offers both free and paid plans, catering to individuals and teams.
United States
A powerful REST API Client with cookie management, environment variables, code generation, and authentication for Mac, Window, and Linux.
United States
The API client for modern developers. Call REST, GraphQL, and gRPC APIs from a simple and intuitive app.
Canada
Hoppscotch is an open-source API development ecosystem. It helps you create your requests faster, saving you precious time on your development.
United States
ApiArk is a local-first API client built with Tauri v2 and Rust. No login, no cloud, no telemetry. Supports REST, GraphQL, gRPC, WebSocket, SSE and MQTT from one interface. Collections are stored as plain YAML files on your filesystem, fully git-diffable.
Bosnia & Herzegovina
HTTPie (pronounced aitch-tee-tee-pie) is a command line HTTP client. Its goal is to make CLI interaction with web services as human-friendly as possible. It provides a simple http command that allows for sending arbitrary HTTP requests using a simple and natural syntax, and...
United States
RapidAPI for Mac (formerly Paw) is a full-featured HTTP client that lets you test and describe the APIs you build or consume. It has a beautiful native macOS interface to compose requests, inspect server responses, generate client code and export API definitions.
United States
The API Astrolab enables today’s API-first companies to show their API products in a visual way so that anyone can understand how they work.
United States
Eviware, the maker of soapUI, Web Service Testing Leader
soapUI is a tool for functional testing, mainly of web services like SOAP based web services and RESTful web services, but also HTTP based services and JMS Services as well as databases. soapUI is an open source and compl.
United States
API testing tool. Which allows web developers to create and test custom HTTP requests.
Poland
EU
HarborClient is a free, open-source desktop API client for macOS, Windows, and Linux. It gives you a familiar Postman-style workspace—collections, environments, request scripts, and a tabbed editor—while keeping your work on your machine or on storage you control.
United States
Cartero is a graphical HTTP client that can be used as a developer tool to test web APIs and perform all kind of HTTP requests to web servers. It is compatible with any REST, SOAP or XML-RPC API and it supports multiple request methods as well as attaching body payloads to...
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