How to import Postman collections into Yaak?

Yaak supports direct import from Postman via its import feature. Navigate to the import section, select your Postman export file, and it will convert collections to Yaak's format for use.

Yaak vs Insomnia: which is better for privacy?

Yaak is better for privacy as it has no telemetry and is offline-first, while Insomnia may collect data. However, Insomnia has a larger user base and more community plugins.

Can Yaak handle GraphQL subscriptions?

Yes, Yaak supports GraphQL along with WebSockets and SSE, making it suitable for real-time APIs including subscriptions, as mentioned in the multi-protocol support.

How to use environment variables in Yaak for different servers?

Create environments within workspaces to define variables like base URLs or API keys. You can easily switch between them to test against dev, staging, or production servers.

Is Yaak completely free to use?

Yaak is open-source but funded by community-purchased licenses. Some features or support might require a license, so check the pricing page for specifics.

How to create custom plugins for Yaak?

Yaak allows plugin development for authentication, template tags, or UI extensions. Refer to the documentation for guidelines on building and integrating plugins.

Yaak (k)

MITTypeScriptv2026.3.1

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

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What is Yaak (k)?

Yaak is a desktop API client that allows developers to organize and execute requests across multiple protocols including REST, GraphQL, WebSockets, Server-Sent Events, and gRPC. It solves the need for a fast, privacy-focused tool that avoids cloud lock-in and telemetry while providing robust organization and security features.

Target Audience

Developers, API testers, and engineering teams who need a reliable, offline-first desktop client for testing and debugging various API types with a focus on security and privacy.

Value Proposition

Developers choose Yaak for its combination of multi-protocol support, strong privacy stance with no telemetry, offline-first design, and extensibility through plugins, all built with modern technologies like Tauri and Rust for performance.

Overview

The most intuitive desktop API client. Organize and execute REST, GraphQL, WebSockets, Server Sent Events, and gRPC 🦬

Use Cases

Best For

Testing and debugging REST APIs with advanced authentication methods

Related Projects

Community-curated · Updated weekly · 100% open source

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18.5k stars740 forks0 contributors

Working with real-time APIs using WebSockets and Server-Sent Events

Managing GraphQL queries and mutations in a desktop environment

Developing and testing gRPC services with a graphical client

Organizing API collections with version control via Git integration

Securing sensitive API keys and secrets with OS keychain storage

Not Ideal For

Teams requiring real-time cloud collaboration and automatic syncing across multiple devices
Users who prefer lightweight, web-based tools for quick API checks without desktop installation
Open-source enthusiasts wanting to freely contribute major features or customizations

Pros & Cons

Pros

Multi-Protocol Versatility

Supports REST, GraphQL, gRPC, WebSocket, and Server-Sent Events in one tool, eliminating the need for separate clients for different API types.

Strong Privacy Focus

Offline-first with no telemetry, encrypted secrets, and OS keychain storage ensures user data remains secure and local, as highlighted in the README.

Flexible Organization

Workspaces with nested folders and environment variables allow structured management for dev, staging, and prod stages, mirroring to filesystem for Git integration.

Extensibility via Plugins

Enables customization through plugins for authentication, template tags, or UI, along with built-in or custom themes, as stated in the features list.

Cons

Restricted Contribution Model

Community PRs are limited to bug fixes and small improvements per the contribution policy, slowing feature additions from external developers.

Desktop-Only Limitation

Lacks web or mobile versions, which hinders cross-platform access and on-the-go API testing, unlike some competitors.

Commercial Licensing Aspect

Development is funded by paid licenses, potentially requiring costs for full features or support, unlike entirely free open-source alternatives.

Open Source Alternative To

Yaak (k) is an open-source alternative to the following products:

Insomnia

Insomnia is an open-source API client for designing, testing, and debugging REST, GraphQL, and other web APIs with a collaborative interface.

B

Bruno

Bruno is an open-source API client and testing tool that stores collections directly in the filesystem using a plain text markup language instead of JSON.

Postman

Postman is a collaboration platform for API development that allows developers to design, test, and document APIs.

Frequently Asked Questions

Home

Integration

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The open-source, cross-platform API client for GraphQL, REST, WebSockets, SSE and gRPC. With Cloud, Local and Git storage.