The best open source alternative to Insomnia REST Client is Bruno. If that doesn't suit you, our users have ranked more than 50 alternatives to Insomnia REST Client and loads of them is open source so hopefully you can find a suitable replacement. Other interesting open source alternatives to Insomnia REST Client are Yaak, Hoppscotch, HTTP Toolkit and Insomnium.
API Dash is a beautiful open-source cross-platform API Client built using Flutter which can help you easily create & customize your API requests, visually inspect responses and generate API integration code. A lightweight alternative to postman/insomnia.
API test automation tool that has GUI, supports HTTP stubs (mock services), data driven testing, and API types beyond HTTP, such as relational database, JMS, FTP(s), AMQP, MQTT, etc.
ArdorQuery is a cross-platform tool for performing any HTTP(S) endpoints like REST API, HTML, Images, GraphQL, OData etc.
HTTP client plugin for Sublime Text with an expansive feature set, modern UX, elegant syntax and first class support for testing.
RESTClient can be used to test variety of HTTP communications and RESTful webservices. Friendly GUI, rich functionalities.
This is a tool to manually explore and test HTTP REST webservices. Runs queries from a plain-text query sheet, displays results as a pretty-printed XML, JSON and even images.
Main goal of this VSCode extension is storing all HTTP request & response data automatically as files in a VSCode workspace.
Wisdom rest-client is a tool supports automated testing REST API, producing exquisite report, and generating exquisite REST API documentation based on historical cases.
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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