Best Free & Open Source Alternatives to Postman

Compare 6 open-source Postman alternatives including HTTPie, Hoppscotch, Insomnia and more

If you're looking for the best open-source alternative to Postman, HTTPie is a strong place to start. If it doesn't quite fit your needs, there are plenty of other great options worth exploring, including Hoppscotch, Insomnia, Bruno and Scalar. We've ranked the top alternatives to help you compare your options and find the right fit.

HTTPie

🚀 HTTPie Desktop — cross-platform API testing client for humans. Painlessly test REST, GraphQL, and HTTP APIs.

Alternative to:

Postman

Hoppscotch

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

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

Bruno

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

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

Yaak

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

Alternative to:

Postman

Frequently Asked Questions

Are there any open source alternatives to Postman?

Yes, there are 6 open source alternatives to Postman. Popular options include HTTPie, Hoppscotch, Insomnia and more. These alternatives are free to use and many offer self-hosting options.

What is the best free alternative to Postman?

The best free alternative to Postman depends on your specific needs. HTTPie is a popular choice with self-hosting capabilities. All alternatives listed here are open source and free to use.

Can I self-host an alternative to Postman?

Yes, 1 of the alternatives listed here can be self-hosted, giving you complete control over your data and privacy.

Why should I switch from Postman to an open source alternative?

Open source alternatives to Postman offer several advantages: no vendor lock-in, complete data ownership, no subscription fees, the ability to self-host for privacy and security, and active community support. You can also customize the software to fit your specific needs.

Postman

Postman is an all-in-one API platform that helps developers design, build, test, document, and monitor APIs. It provides an easy-to-use interface for sending requests, inspecting responses, and automating workflows, making it a go-to tool for working with APIs of any size or complexity.

Beyond simple request testing, Postman supports the full API lifecycle. Teams can collaborate in shared workspaces, create mock servers, automate tests, generate documentation, and integrate with CI/CD pipelines. Its robust set of tools and integrations streamlines API development and ensures consistency, security, and scalability across projects.

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Hoppscotch vs Insomnia

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