If you need a service that handles game development, deployment and management, Unity is a good choice. The all-in-one platform includes a wide range of tools for multiplayer networking, backend programming, live operations, DevOps and game monetization. Unity also supports high-performance and scalable game hosting, content management, version control and analytics so you can concentrate on the creative aspects of game development while Unity's mature infrastructure handles the grunt work.
Another good option is Beamable, which is geared for fast creation and deployment of online games and virtual worlds. Its serverless design with microservices and C# scripting means developers can write their own game server code without having to set up the underlying infrastructure. Beamable also has a LiveOps Portal for live operations and game management and integrates with Unity and Unreal Engine so you can quickly add game features and content.
If you want to run live games on multiple platforms, Microsoft Azure PlayFab is a good option. It offers services for multiplayer, live operations, content management and real-time analytics to help developers build and run games on Xbox, PlayStation, Nintendo Switch and Facebook and other platforms. The service offers a free development mode and pay-as-you-go pricing so it's available to developers large and small.