Altair GraphQL Client vs Prism

Altair GraphQL Client is an open-source GraphQL IDE for sending queries, mutations, and subscriptions to GraphQL APIs. It provides features like query autocompletion, schema documentation browsing, environment variables, and request collections. The client is available as a desktop application, browser extension, and web app.

Prism is API mock server and contract testing tool that generates realistic responses from OpenAPI specifications.. It is available under a free model. This tool falls under the api tools category.