Photon

Photon supplies real-time networking SDKs and cloud-hosted rooms for multiplayer games across Unity, Unreal and native platforms. Its strength lies in low-latency authoritative or client-hosted sessions rather than full backend services. Relative to Heroic Labs, Photon lacks built-in social graphs, economy systems or Satori-style experimentation, making it a lighter complement or alternative when only networking is required instead of Nakama's complete stack.