There are three main liveability indexes.
It won this year (and last), for the Economist Intelligence Unit
https://www.economist.com/graphic-de...-liveable-city
Tenth time in a row by Mercer
https://www.wien.info/en/lifestyle-s...t-livable-city
and is currently 3rd place (after Munich and Tokyo) for Monocle (though perenially second place)
https://monocle.com/film/affairs/qua...5-cities-2019/
The city's that occasionally beat it are Munich, Melbourne, Sydney and Tokyo (all rated by Monocle), which also aren't as billionaire boosted (as for example, San Francisco, Mumbai, Beijing, London, NYC, Hong Kong, Moscow).