On: How Facebook, Apple and Microsoft Are Contributing...

[Semaphor]

As others said, it depends. Here in my city (Lübeck) in Germany, OSM runs circles around GM and then leisurely sprints towards the goal. When I was in South Africa (Pretoria) OSM was so out of date that it was unusable, and that's without information there that's always been wrong.

[ArekDymalski → Semaphor]

For anyone interested in improvement of OSM data, I'd like to recommend the StreetComplete android app:

https://play.google.com/store/apps/details?id=de.westnordost...

While contributing you almost feel like playing a game :)

[Semaphor → ArekDymalski]

Yeah, I used it for a while (lived there for half a year), but the base data was just too wrong for it to be much fun.