Open source
Insomnia
Open source desktop client for testing HTTP, GraphQL and gRPC APIs
API ClientsOpen source API client
Alternatives to Thunder Client
12 tools like Thunder Client, chosen by what they do. About Thunder Client
Open source
Yaak
Local-first desktop API client that stores requests as files in Git
API ClientsFast desktop API client
Open source
Curated
Requestly
Desktop API client with local projects, mocks and Postman import
API ClientsIntercept and mock requests
Open source
Hoppscotch
Open source web app for building and testing API requests
API ClientsOpen source API tester
Open source
HTTPie
Friendly command-line and desktop client for testing HTTP APIs
API ClientsFriendly HTTP clientInactive
Freemium
Apidog
All-in-one API platform for design, testing, mocking and docs
API ClientsAll in one API platform
Open source
Altair GraphQL Client
Feature-rich desktop and web client for debugging GraphQL servers
GraphQL and RPCFeature rich GraphQL client
Open source
tRPC
Typesafe APIs shared between a TypeScript server and client
GraphQL and RPCEnd-to-end typesafe APIs
Freemium
Apollo GraphQL
Platform to build and run one graph over your existing APIs
GraphQL and RPCGraphQL client and server tool
Open source
Connect
Protobuf RPC library for browser and gRPC-compatible APIs
GraphQL and RPCBrowser friendly gRPC