this is (at least) the third time we've seen this in this exact space: Postman, Insomnia, Bruno.

At this point I just use the REST client extension in VS Code (Rider has one too) or HURL. The lack of GUI makes it a little tougher for new people, but file-based is nice, and in the end I have much stronger skills & understanding in the area.

They explicitly sold themselves as an Insomnia alt.

Here is their usage graph: https://star-history.com/#usebruno/bruno&Date

Insomnia introduced account shenanigans around the end of Sept 23: https://github.com/Kong/insomnia/discussions/6590

The features you pay for are just GUI features. All of the things are still accessible in the terminal or IDE.