Alternatives to

5 Best Open Source Alternatives to Postman (2026)

API development and testing platform

Postman starts at $12/mo — these alternatives can save you money.

JavaScript API for rendering 3D graphics in web browsers

Open Source1.5KAlternative to Postman

Modern terminal-based API client for developers.

Open Source11.4KAlternative to Postman

Instantly deploy scalable serverless apps and APIs to AWS.

Open SourceAlternative to Postman

Modern JavaScript ponyfills without overriding native APIs.

Open Source63Alternative to Postman

Open-source machine translation API for seamless language translation.

Open SourceAlternative to Postman

Frequently Asked Questions

WebGL is the most popular free alternative to Postman, with 1,473 GitHub stars.

Yes! There are 0 open source alternatives to Postman listed above.

Postman starts at $12/mo. The alternatives listed above include free and more affordable options.