Does Google use slack? Wanted to start my year with some extra strength tinfoil and it'd just be great if the day a unionizing initiative started the major way

Does Google use slack? Wanted to start my year with some extra strength tinfoil and it'd just be great if the day a unionizing initiative started the major way workers could talk about said unionizing initiative went down. EDIT: according to a random quora post they do, so keep the tinfoil out!