[ineedasername]

I still just call them Facebook, just like most people still just call Google Google (instead of Alphabet)

[tylerhou]

Well technically Google still exists; it’s a subsidiary of Alphabet, and people who work at Google are employed by “Google LLC” (and not Alphabet). (In fact I think I remember there was some training that explicitly told us to NOT say that we were employees of Alphabet.)

The company “Facebook” no longer exists, though.

[alexvoda]

Yup they rebranded for different reasons.

Therefore to frustrate the marketing efforts of both you should call them Facebook and Alphabet (even when actually referring to the current Google).