Le Mans Ultimate 
rFactor 2 About RaceControl.gg
Rather than relying on manual server browsing, RaceControl.gg runs daily ranked races split into beginner, intermediate and advanced difficulty tiers, plus community-organized leagues, so drivers can find a competitive field at their own level without hunting for a populated server. Its event hosting and community infrastructure run on SimGrid's underlying platform, the same league-management tool listed elsewhere in this index.
On top of matchmaking, RaceControl also runs LiveryHub for browsing and sharing custom liveries, and hosts select events with live stewarding and broadcast coverage, occasionally with real prize pools attached. As the platform Motorsport Games Inc. and Studio 397 point drivers toward for both Le Mans Ultimate and rFactor 2, it's where most organized competitive play for those two titles actually happens.
Core matchmaking and league participation are free. An RC Pro subscription adds custom liveries, driver-swap and team management support, public live timing and DLC access across both games, and a higher RC Pro+ tier layers on additional championship and reporting features for league organizers.