Exit Games Photon provides developers with global cross platform multiplayer game backends as a service (SaaS, Cloud) and on premise server solutions for asynchronous and synchronous games and applications.
SDKs are available - e.a. - for android, iOS, .NET, Unity, Corona, PlayFab, marmalade, cocos2D-x, JavaScript and more.
This is the Exit Games' engineers account to answer your Photon and multiplayer game related questions on Stack Overflow.