Photon Quantum
- 1Runs onAndroid, iOS, Linux, Mac, Web, Windows
- 2CostsFree plan · paid from $0.50/mo
- 3Network modelclient-server
- 4Supported platformsWindows, macOS, Android, iOS, WebGL, Nintendo Switch, Xbox One, Xbox Series X|S, PS4, PS5
- 5MatchmakingYes
- 6Rollback netcodeYes
- 7Max players per session128 players
- 8Transport protocolsUDP, TCP, WebSocket, Secure WebSocket
Overview
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 125.00 USD per month. The Quantum Plugin SDK requires Gaming Circle or Industries Circle membership. Photon Engine states it is ISO 27001:2022 certified.
Who it is for
Quantum suits Unity teams building online multiplayer games that need deterministic simulation and rollback. The listed access limits and Plugin SDK membership requirement are relevant when planning development and deployment.
What is good
- Sessions are listed for up to 128 players.
- Deterministic libraries include physics, navigation, and animation.
- Server components can connect customer-hosted backends.
- Quantum 3 webhooks support replay delivery and validation.
- Free options cover 20 or 100 connected users.
What to know first
- The 20-user option is development-only.
- The 100-user free plan is games-only.
- Plugin SDK requires Gaming Circle or Industries Circle membership.
- Premium Cloud has a $1,000 monthly minimum.
Verdict
Quantum combines deterministic simulation, rollback, and Photon networking for Unity multiplayer projects. Check the CCU and traffic limits, and the membership requirement for the Plugin SDK, against the intended setup.
Photon Quantum plans and pricing
All plansCompared on game networking middleware
- Free plan
- Yesphotonengine.com
- Network model
- client-serverphotonengine.com
- Supported platforms
- Windows, macOS, Android, iOS, WebGL, Nintendo Switch, Xbox One, Xbox Series X|S, PS4, PS5photonengine.com
- Matchmaking
- Yesphotonengine.com
- Rollback netcode
- Yesphotonengine.com
- Max players per session
- 128 playersphotonengine.com
- Transport protocols
- UDP, TCP, WebSocket, Secure WebSocketphotonengine.com
Facts
- Product
- Photon Quantum is a deterministic ECS framework for Unity online multiplayer games, listed for up to 128 players.doc.photonengine.com · 29 Sept 2026
- Prediction and rollback
- Clients exchange player input, predict other players' inputs locally, and restore and resimulate game state when predictions are wrong.doc.photonengine.com · 29 Sept 2026
- Unity integration
- Quantum separates simulation from presentation, with Unity used for editor tooling and the view layer.photonengine.com · 29 Sept 2026
- Simulation libraries
- The documented deterministic libraries include math, 2D and 3D physics, navigation, animation, and bots.doc.photonengine.com · 29 Sept 2026
- Network infrastructure
- Quantum uses Photon Realtime transport and Photon server infrastructure to synchronize clocks and manage input latency.doc.photonengine.com · 29 Sept 2026
- Backend integration
- Quantum's server component can be extended to integrate with customer-hosted backends such as matchmaking, player services, and referee simulations.doc.photonengine.com · 29 Sept 2026
- Webhooks
- Quantum 3 supports webhooks for room control and validation of configuration and player data, and can send full match replays to a configurable endpoint.photonengine.com · 29 Sept 2026
- Cheat resistance
- Photon says deterministic gameplay and input-only exchange help resist cheating, and describes replay validation or server referee simulations as anti-cheat measures.photonengine.com · 29 Sept 2026
- Security certification
- Photon Engine states that it is ISO 27001:2022 certified.photonengine.com · 29 Sept 2026
- Support
- Free plans include online documentation, samples, tutorials, video streams, and help with account and billing matters; Gaming Circle offers premium development support.photonengine.com · 29 Sept 2026
- Notable access limit
- The Quantum Plugin SDK requires Gaming Circle or Industries Circle membership and enables developers to create and locally test a custom Quantum server for Photon Enterprise Cloud.photonengine.com · 29 Sept 2026
- Web platform sample
- Photon provides a Quantum sample that targets Unity WebGL and integrates CrazySDK from Crazy Games.photonengine.com · 29 Sept 2026
Company
- Headquarters
- Hamburg, Germanyphotonengine.com · 28 Sept 2026
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Sources
- doc.photonengine.com/quantum/v3/quantum-intro· checked 29 Sept 2026
- photonengine.com/quantum· checked 29 Sept 2026
- photonengine.com/compliance· checked 29 Sept 2026
- photonengine.com/quantum/pricing· checked 29 Sept 2026
- photonengine.com/sdks· checked 29 Sept 2026