v2025.5 → Public Plugins and GraphQL Docs

The Postman alternative for modern developers

A fast and offline API client for REST, GraphQL, WebSockets, Server Sent Events, and gRPC.

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62k

Open Source

Available for Mac, Windows, and Linux

Fast and private

Local-only data, secrets encryption, and zero telemetry.

Works with Git

Optionally store data as plain-text for Git, DropBox, etc.

Extend with Plugins

NodeJS plugin system for auth, template functions, and more.

Hey, I'm Greg 👋🏼

Having created and sold Insomnia in 2019, I didn't think I'd build another API client, but the tools changed for the worse and I found myself looking for something better.

I started over and built something I'm proud to put my name behind.

Trusted by developers

Modern, offline, open source, Git friendly, and extensible. What's not to love?

Nir Galon

After testing countless others that either lacked features or tried to dazzle with needless AI, Yaak stands out as a true masterpiece. 🙌

KindMonitor6206

I like the feature where you can paste in curl examples and it formats it right into the client for use. The guy who made Insomnia started Yaak.

Elias

When I was looking for a clean and simple API client a few months ago, I came across Yaak ... I just love clean UI and lack of clutter.

Alex Yumashev

Yaak is my new favorite REST client P.S. Ironically, made by the same guy who built Insomnia, sold it, now making a new one 🤣🤣

Kos Komelin

Got fed up with bloated API clients, so gave @yaakapp a try. Removed others from my computer immediately after that.

Faraz Patankar

My go-to tool for testing APIs as I build them. The interface is clean and much nicer to use than bloated alternatives like Insomnia and Postman.

mariodev ⚡

First it was Postman, then insomnia was the new kid in the block, these two suckers got old and smell corpo from miles away, it is time now for yaak.app

Abhay Salvi

I am already in love with it by using it for 5 min. This is insane!!! I shared it within my company and now I am going to evangelize Yaak to everyone 🥹

JustSteveKing

I've been using @yaakapp for a while now, and I absolutely love it! If you need a https client for your desktop, go check it out

Michael Bromley

Just got my commercial license for @yaakapp and if you work with APIs I encourage you to do the same - it's the best postman replacement out there

Timothy Cole

I’m blown away by how much better it is than Postman or Insomnia. It’s fast, clean, and reliable, which has made managing our APIs effortless.

sauce

Seems like @yaakapp is the first true replacement for Postman with feature parity ... Simple, fast, beautiful and NO LOGIN POPUPS 😫🥹

Kevin Cunningham

I think this is my favourite for now. A clean and simple interface, focused on the core activities. It's local first and doesn't need an account.

Müjdat Korkmaz

I definitely recommend it. I tried others as well, but so far I find Yaak to be the most complete open source alternative to Postman

Rhys

i finally started properly using Yaak today rather than just pasting curl requests in and it's a delightful piece of software.

Developer friendly

Work in the ways you're already used to.

Everything you need

Yaak's keeps things simple by default, exposing features only when needed.

Start from anywhere

Integrate with your existing workflow by importing data from many places:

PostmanInsomniaOpenAPICurlSwagger

Call any API

Mix multiple protocols together and work on any API within a single workspace.

RESTHTTPGraphQLgRPCWebSocketServer Sent Events

Authenticate anything

Automatically handle complex request authentication, so you don't have to:

OAuth 2.0JWTBasicBearerAPI KeyCustom

Request chaining

Variables

Encrypted secrets

Auth inheritance

Batch send

Custom proxy

Rich previews

Import/export

Paste Curl

Copy as Curl

Streaming

Git UI

Command palette

Autocomplete

Request docs

Constantly improving

Your feedback has been shaping Yaak since its launch in January 2024.

2025.5.0	Plugin Directory, GraphQL Doc Explorer, and Run Button
2025.4.0	Environment Colors and Custom Fonts
2025.3.0	Folder Inheritance, and More Template Functions
2025.2.0	Encrypted Text, Sharable Environments, and Nested Functions
2025.1.2	Removing Telemetry, and Better License Badge
2025.1.1	Directory Sync, Git, WebSockets, and OAuth
2024.13.0	Signed Windows Binaries and New Pricing
2024.12.0	Introspection Controls and Sync System Progress

View Roadmap

Still not convinced?

Import an existing Postman, Insomnia, or OpenAPI collection and get started instantly.