Voiden vs Yaak

Comparing two open source alternatives to Postman. Use the comparison below to decide which one fits your needs.

Voiden

Apache-2.0

Design, test and document APIs in plain Markdown with a git-native, offline-first approach.

Visit Full details

Yaak

MIT

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

Visit Full details

Side-by-side comparison

	Voiden	Yaak
License	Apache-2.0	MIT
Self-hostable	No	No
GitHub Stars	1,767	19,299
Forks	86	826
Open Issues	20	8
Last Commit	Oct 9, 2026	Oct 10, 2026
First Released	May 9, 2025	Feb 16, 2023
Categories	API Development & Testing Tools	API Development & Testing Tools
Tags	#API #api client #DeepSeek #cli #markdown	#API #rest #http client #api client

GitHub stars over time

Voiden

Yaak19,299

Similar open source alternatives

Hoppscotch

Open source API development ecosystem - https://hoppscotch.io (open-source alternative to Postman, Insomnia)

Alternative to:

Postman

HTTPie

Open-source command-line and desktop HTTP client with intuitive syntax, JSON support, and built-in auth — a developer-friendly Postman alternative.

Alternative to:

Postman

Scalar

Scalar is an open-source API platform:　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　🌐 Modern Rest API Client　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　📖 Beautiful API References　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　✨ 1st-Class OpenAPI/Swagger Support

Alternative to:

Postman

Bruno

Opensource IDE For Exploring and Testing API's (lightweight alternative to Postman/Insomnia)

Alternative to:

Postman

Hurl

Run and test HTTP requests with plain text — a simple yet powerful command-line tool for API testing.

Alternative to:

Postman

Insomnia

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

Alternative to:

Postman