I've found that overall, for public transport, HERE maps is a feasible alternative in most cases, here's a quick example of how a route might look (though there is a mobile app available as well, IMO the performance is much better than Google Maps'): https://wego.here.com/directions/publicTransport/Riga-Intern...
Now, of course, Google probably still has more real time data in this regard, especially since it's possible for them to aggregate it due to a large amount of users and so on.
It would be nice to have more FOSS projects pop up that would deal with providing company listings and reviews on the map like Google does, as well as would provide more real time transport information as well. But hey, at least OSM gives us a really good starting point, the rest is a matter of building it and getting the data!
Now, of course, Google probably still has more real time data in this regard, especially since it's possible for them to aggregate it due to a large amount of users and so on.
It would be nice to have more FOSS projects pop up that would deal with providing company listings and reviews on the map like Google does, as well as would provide more real time transport information as well. But hey, at least OSM gives us a really good starting point, the rest is a matter of building it and getting the data!