For me a tech company is one that sales APIs, SDKs or similar products. I was in 3 "tech" startups before that were both b2c and b2b. Their product was perpendicular to their technology (one video-tech 2 Fintech) my current company's product is a set of APIs. It means that the features that we sell ARE the technology, instead of some footnote that buyers send to their nerd department to make sure it checks a box.

Needless to say, the difference on how the tech team is valued is night and day between this last one and all the others.