Postman
Drop-in replacementFree with paid extrasThe official Linux build from Postman. Same app, same account, same collections.
Your files: Collections and environments sync through your account, and exported collection files import as they are.
Does Postman run on Linux?
Verdict: Yes
Yes. Postman publish a Linux version themselves, for both normal 64-bit machines and ARM ones, and your collections come across when you sign in.
Postman list Linux on the same download page as Windows and Mac. The build Postman recommend is the Snap package, because it brings the extra pieces the app needs rather than relying on what your system happens to have. There is also a plain download from their site.
Sign in and everything you had appears. Collections, environments, variables and request history all sync through your Postman account, so there is nothing to export and re-import.
The one thing to avoid is the copy in the Linux app store from Flathub. It works, but Postman say it is community made and not supported by them, so if something misbehaves you are on your own.
Your plan carries over too. Postman is a paid product with a free tier, and the tier you are on does not change because you changed computers.
Postman on Linux, and alternatives
Insomnia
Close matchFree with paid extrasLighter open source alternative that does the same job. Can import Postman collections, though some scripting does not carry over.
Your files: Imports exported Postman collections. Pre-request and test scripts may need reworking.
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