Kong Insomnia is a collaborative open-source API development platform designed to simplify the process of building high-quality APIs. It supports multiple protocols and provides a dev-friendly UI with built-in automation and an extensible plugin ecosystem. Features include multi-protocol support for HTTP, REST, GraphQL, gRPC, SOAP, and WebSockets, organizations and E2EE for team collaboration, local vault or Git sync for data governance, automatic validation with OpenAPI specification linting, API mocking capabilities, automated API testing with native CLI and CI/CD integrations, and extensible plugin ecosystem with over 350 open-source plugins.