When building an online game in Unity, the question is often framed as:
Should I use Photon, Netcode for GameObjects, FishNet, or Mirror?
That question is too small.
In 2026, there is still no single networking product that is optimal for every Unity game. The real decision is a stack: transport, netcode, authority model, session management, server hosting, and backend services.
For a GameObject-based action game that needs client prediction, Photon Fusion 2.1 is a strong first PoC baseline. If your priorities are Unity Gaming Services, DOTS/ECS, self-hosting, source access, or deterministic simulation, the starting point changes.
