Open source alternatives to Postman

By GitHub stars it is Hoppscotch, with 80,801 stars and a commit on 5 Nov. Choose Hoppscotch when you want team workspaces from $8 per user a month, or a free MIT edition hosted on your own servers. Next come Bruno (48,393 stars) and Insomnia (40,154 stars).

Yes. The code of all 7 is public under MIT, Apache 2.0 or BSD 3-Clause, so you can use them with no licence fee. Running one yourself costs the server and your time to look after it, and some makers also sell a hosted plan.

Start from the job you use Postman for. Choose Insomnia when you want API collections kept on your own machine or in your own Git repo, with no cloud account needed. Choose Bruno when you want API collections stored as plain files in your Git repo instead of a vendor cloud workspace.

All 7: Hoppscotch, Bruno, Insomnia, Yaak, Scalar, Voiden and Chapar. Each tool's page says what it needs to run.

All 7 we track had a commit in the last 30 days, among them Hoppscotch, Bruno, Insomnia and Yaak. A recent commit shows the project is kept up, not that it will stay that way.

MIT (4), Apache 2.0 (2), BSD 3-Clause (1). MIT, BSD and Apache let you change and reuse the code freely.

The hosting. Postman's maker runs the servers for you; with an open source tool the updates, backups, security fixes and support are yours, unless you take the maker's hosted plan. Features differ too, so check what each one imports and exports before you move your data.