Insomnia vs Voiden
Comparing two open source alternatives to Postman and Thunder Client and Paw and Apidog. Use the comparison below to decide which one fits your needs.

Insomnia
Apache-2.0The open-source, cross-platform API client for GraphQL, REST, WebSockets, SSE and gRPC. With Cloud, Local and Git storage.

Voiden
Apache-2.0Design, test and document APIs in plain Markdown with a git-native, offline-first approach.
Side-by-side comparison
Insomnia | Voiden | |
|---|---|---|
| License | Apache-2.0 | Apache-2.0 |
| Self-hostable | No | No |
| GitHub Stars | 39,960 | 1,559 |
| Forks | 2,362 | 76 |
| Open Issues | 862 | 37 |
| Last Commit | Aug 24, 2026 | Aug 26, 2026 |
| First Released | Apr 23, 2016 | May 9, 2025 |
| Categories | ||
| Tags |
GitHub stars over time
GitHub stars over time
Similar open source alternatives

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

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

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

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

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

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