[sschueller]

HackRF One requires a host computer such as a laptop so I wouldn't compare those to be siblings. More a cyberdeck with an SDR would be a larger sibling like this one: https://hackaday.io/project/183892-cyberdeck1

[plugger]

Have you ever seen the PortaPack? https://github.com/eried/portapack-mayhem

[sschueller]

Ah, forgot about that, yes I guess that could be considered the bigger brother of the flipper zero.