Best API clients
Tools for sending HTTP requests, testing APIs and sharing request collections.
27 apps, ordered by visits from AppBreakup and how often our research lists each one as an alternative. Open any app to see its alternatives.
All API clients
- Alternatives to Postman
API platform for building, testing and documenting APIs.
Free plan + paidWeb, Windows, macOS, Linux - Alternatives to Bruno
- Alternatives to Insomnia
- Alternatives to Hoppscotch
Open-source API development ecosystem in the browser.
Open sourceSelf-hostableWeb, Windows, macOS, Linux, Self-hosted - Alternatives to Hurl
An open-source command-line tool that runs and tests HTTP requests written in plain text.
Open sourceLinux, macOS, Windows - Alternatives to Yaak
A fast, local-first desktop API client for REST, GraphQL, gRPC, WebSockets and SSE.
Free plan + paidOpen sourcemacOS, Windows, Linux - Alternatives to HTTPie
Human-friendly HTTP client for the terminal and desktop.
FreeOpen sourceWeb, Windows, macOS, Linux - Alternatives to Apidog
An all-in-one API platform for design, debugging, mocking, testing and docs.
Free plan + paidSelf-hostableWeb, Windows, macOS, Linux, Self-hosted - Alternatives to Posting
An open-source API client with a full interface that runs in your terminal.
Open sourceLinux, macOS, Windows - Alternatives to httpYac
An open-source runner for .http files, as a VS Code extension and a command-line tool.
Open sourceWindows, macOS, Linux - Alternatives to Karate
An open-source test automation framework for APIs, UI, mocks and performance in one syntax.
Open sourceWindows, macOS, Linux - Alternatives to Requestly
A local-first desktop API client from BrowserStack, plus browser traffic interception.
PaidmacOS, Windows, Linux, Browser extension - Alternatives to Slumber
An open-source terminal HTTP client with a TUI, a CLI and YAML request collections.
Open sourceLinux, macOS, Windows - Alternatives to SoapUI
SmartBear's long-running open-source tool for functional testing of SOAP and REST APIs.
Open sourceWindows, macOS, Linux - Alternatives to ATAC
A free, open-source Postman-style API client for the terminal, written in Rust.
Open sourceLinux, macOS, Windows - Alternatives to REST Client for VS Code
A free VS Code extension that sends HTTP requests straight from .http files.
Open sourceWindows, macOS, Linux - Alternatives to Thunder Client
A lightweight REST API client that runs inside VS Code and JetBrains IDEs.
Free plan + paidWindows, macOS, Linux - Alternatives to curl
The ubiquitous open-source command-line tool and library for transferring data with URLs.
Open sourceWindows, macOS, Linux - Alternatives to xh
A fast, open-source command-line HTTP client with HTTPie-style syntax, written in Rust.
Open sourceLinux, macOS, Windows - Alternatives to Katalon Studio
A test automation tool for API, web, mobile and desktop apps, with a free tier.
Free plan + paidWindows, macOS, Linux - KrAlternatives to Kreya
A desktop API client with strong gRPC support, plus REST, GraphQL and WebSockets.
Free plan + paidmacOS, Windows, Linux - Alternatives to Testfully
An API client with offline and cloud workspaces, codeless testing and API monitoring.
Free plan + paidWeb, Windows, macOS, Linux - Alternatives to Restfox
A minimal, offline-first open-source HTTP and socket client for the web and desktop.
Open sourceWeb, Windows, macOS, Linux - Alternatives to Scalar
An open-source API client and OpenAPI docs platform, with a free hosted tier.
Free plan + paidOpen sourceWeb, macOS, Windows, Linux - Alternatives to Altair GraphQL Client
A free, open-source GraphQL client for desktop, browser extensions and the web.
Open sourcemacOS, Windows, Linux, Browser extension, Web - Alternatives to Mockoon
A free, open-source desktop app and CLI for running mock APIs locally.
Open sourceSelf-hostablemacOS, Windows, Linux, Self-hosted - Alternatives to RapidAPI for Mac (Paw)
A native macOS HTTP client, formerly called Paw, now free and owned by Nokia.
FreemacOS
Our picks by need
Popular comparisons
Common questions
What are the best API clients?
Based on how often our research lists them as alternatives and visits from AppBreakup, the leading API clients right now are Postman, Bruno, Insomnia, Hoppscotch and Hurl.
Are there free API clients?
Yes. Postman (free plan + paid), Bruno (open source), Insomnia (open source), Hoppscotch (open source) and Hurl (open source) have a free option, out of 26 free or freemium apps we track.
Which API clients are open source?
Bruno, Insomnia, Hoppscotch, Hurl, Yaak and HTTPie, and 13 more.