I've been happily using Fantastical for this over the past year. The native Mac and iOS apps are beautiful. And since, you know, we folk here tend to be a little code savvy, I just set up a server redirect from mydomain.tld/meet to the slightly longer Fantastical URL, and it works like a charm. Boom — branded URL, integration with a fantastic calendar app, nice flexible scheduling. Really happy with this setup.