Netcode for GameObjects vs Photon Quantum

Netcode for GameObjects is Unity’s high-level networking library for synchronizing GameObjects and world data during multiplayer sessions. Unity describes it as suited to games with smaller player counts and less complex game logic, including adding multiplayer to an existing GameObject-based single-player game. Networking can use client- or server-authoritative models. NetworkBehaviour components use NetworkVariables to synchronize state and RPCs to send messages over the network. Integrated scene management is enabled by default and synchronizes scenes across connected clients. Unity Transport is the default transport, while Unity Relay can provide Relay networking for GameObject and MonoBehaviour workflows. Unity Multiplayer Services sessions are compatible with the package, which handles gameplay state replication after players connect. The package is free, but installation requires an active Unity account with a valid license, a supported Unity version, and an existing project. Supported platforms listed include Windows, macOS, Linux, iOS, Android, XR platforms on those systems, most closed platforms, and WebGL with specified package versions. There is no matchmaking functionality; developers must use third-party services for matchmaking. A full client-side prediction and reconciliation system must also be built by the developer.

Photon Quantum is a deterministic ECS framework for Unity online multiplayer games, with sessions listed for up to 128 players. Clients exchange player input, predict other players’ inputs locally, then restore and resimulate game state when a prediction is wrong. Quantum separates simulation from presentation: Unity supplies editor tools and the view layer, while deterministic libraries cover math, 2D and 3D physics, navigation, animation, and bots. Photon Realtime transport and Photon server infrastructure synchronize clocks and manage input latency. Developers can extend the server component to connect customer-hosted services such as matchmaking, player services, and referee simulations. Quantum 3 webhooks support room control, configuration and player-data validation, and sending match replays to a configured endpoint. Free access includes development-only service for 20 connected users or a games-only option for 100. The 100 CCU plan costs 95.00 USD once for 12 months; the 500 CCU plan is $125 a month. The Quantum Plugin SDK requires Gaming Circle or Industries Circle membership. Photon Engine states it is ISO 27001:2022 certified.