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Postman

Open Source Alternatives to Postman

27 alternatives315.5k total stars22.3k total forks10 languages
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What is Postman?

Postman is a collaboration platform for API development that allows developers to design, test, and document APIs.. There are currently 27 open-source alternatives to Postman, with a combined total of 315.5k GitHub stars. The most common language among these projects is TypeScript.

Showing 27 open-source alternatives

Hoppscotch
Hoppscotchhoppscotch/hoppscotch

An open-source API development ecosystem for testing HTTP, WebSocket, GraphQL, and other APIs with real-time collaboration.

79.5k5.9kTypeScript
3 days ago
Bruno
Brunousebruno/bruno

An open-source, offline-first API client that stores collections as files for Git-based collaboration.

44.7k2.6kJavaScript
3 days ago
Insomnia
Insomniagetinsomnia/insomnia

An open-source, cross-platform API client for GraphQL, REST, WebSockets, SSE, and gRPC with local, Git, and cloud storage options.

38.5k2.3kTypeScript
21 hours ago
Insomnia
InsomniaKong/insomnia

An open-source, cross-platform API client for GraphQL, REST, WebSockets, SSE, gRPC, and other HTTP-compatible protocols.

38.5k2.3kTypeScript
21 hours ago
Yaak (k)
Yaak (k)mountain-loop/yaak

A fast, privacy-first desktop API client for REST, GraphQL, WebSockets, SSE, and gRPC.

18.7k763TypeScript
4 days ago
Scalar
Scalarscalar/scalar

An open-source API platform providing a modern REST API client and beautiful API references with first-class OpenAPI/Swagger support.

15.2k866TypeScript
1 day ago
MeterSphere
MeterSpheremetersphere/metersphere

An open-source continuous testing platform with AI assistant, integrating test management, API testing, and team collaboration.

13.3k2.8kJava
4 days ago
posting (k)
posting (k)darrenburns/posting

A terminal-based HTTP client for keyboard-centric API testing and development workflows.

12.0k245Python
2 months ago
wuzz
wuzzasciimoo/wuzz

Interactive terminal UI for inspecting, debugging, and sending HTTP requests with cURL-like syntax.

10.7k407Go
7 months ago
Requestly
Requestlyrequestly/requestly

A local-first API client and HTTP interceptor for building, testing, and mocking APIs directly in your browser or desktop.

6.7k704
5 days ago
gRPC UI
gRPC UIfullstorydev/grpcui

A command-line tool that provides an interactive web UI for testing and debugging gRPC servers, similar to Postman for gRPC APIs.

5.9k424JavaScript
12 days ago
Postcat
PostcatPostcatlab/postcat

An open-source, cross-platform API development and testing tool with plugin support for REST, Websocket, and more.

5.6k805JavaScript
3 months ago
Altair GraphQL Client
Altair GraphQL Clientaltair-graphql/altair

A beautiful, feature-rich GraphQL Client IDE for debugging queries across all platforms.

5.4k392TypeScript
2 days ago
ATAC
ATACJulien-cpsn/ATAC

A terminal-based API client for sending HTTP/WebSocket requests, managing collections, and scripting—free, offline, and account-less.

3.6k130Rust
3 months ago
CocoaRestClient
CocoaRestClientmmattozzi/cocoa-rest-client

A free, native macOS application for testing and debugging HTTP/REST endpoints with a lightweight UI.

2.4k205Objective-C
1 year ago
kulala.nvim
kulala.nvimmistweaverco/kulala.nvim

A fully-featured HTTP client interface for Neovim, supporting REST, GraphQL, gRPC, and WebSocket requests.

2.1k99Lua
3 days ago
rest.nvim
rest.nvimrest-nvim/rest.nvim

A fast, asynchronous HTTP client for Neovim that runs HTTP requests directly from .http files within the editor.

2.0k147Lua
5 months ago
Yaade (.9k)
Yaade (.9k)EsperoTech/yaade

An open-source, self-hosted, collaborative API development environment for teams to securely manage and share API collections.

2.0k86JavaScript
9 months ago
Step CI
Step CIstepci/stepci

An open-source API Quality Assurance framework for automated testing of REST, GraphQL, gRPC, tRPC, and SOAP APIs.

1.9k95TypeScript
1 year ago
SoapUI (.6k)
SoapUI (.6k)SmartBear/soapui

A free and open-source cross-platform functional testing solution for APIs and web services.

1.7k631Java
6 days ago
Advanced REST Client (.4k)
Advanced REST Client (.4k)advanced-rest-client/arc-electron

A desktop application for testing, debugging, and interacting with REST APIs and web services.

1.5k233JavaScript
9 days ago
Milkman
Milkmanwarmuuh/milkman

A fast, extensible JavaFX-based workbench for crafting and testing HTTP, gRPC, GraphQL, and other requests via plugins.

1.3k80Java
5 months ago
Chapar
Chaparchapar-rest/chapar

A native API testing tool for developers, supporting both HTTP and gRPC protocols with a focus on simplicity and local data storage.

70241Go
6 days ago
ain
ainjonaslu/ain

A terminal HTTP API client that organizes requests in files, supports scripting, and uses curl/wget/httpie as backends.

61915Go
7 months ago
FsHttp
FsHttpronaldschlenker/FsHttp

A hackable HTTP client for F# and .NET that combines convenience with flexibility for both interactive exploration and production use.

49841F#
2 months ago
Httper-iOS
Httper-iOSMuShare/Httper-iOS

A REST API testing tool for iOS that lets developers test APIs on mobile devices without a desktop PC.

41929Swift
2 years ago
Escambo
EscamboCleoMenezesJr/escambo

An HTTP-based API testing application for GNOME built with GTK4 and Libadwaita.

1458Python
2 years ago
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