Colyseus vs Photon Fusion

Colyseus is an open-source Node.js framework for building real-time multiplayer games, with built-in matchmaking and state synchronization. Its authoritative server design has clients send inputs while the server decides game outcomes. Developers define game state on the server, and Colyseus synchronizes it to clients without manual serialization. The framework creates rooms and matches players automatically; rooms can be distributed across processes or machines. The site says this can scale from 10 to 10,000+ concurrent users. SDKs or integrations are listed for JavaScript, Unity, Godot, GameMaker, Defold, Haxe, C, and Construct 3. The MIT-licensed framework is free for commercial games and can be self-hosted as a standard Node.js application on cloud services or bare metal. Colyseus Cloud provides deployment, scaling, and monitoring across 32 global locations. Its Cloud plan starts at $15/mo and includes email support, while the free Open Source plan includes community support. Cloud has no free tier or automatic scaling; heavier workloads require upgrading deployment resources through the dashboard.

Photon Fusion is a state-transfer netcode SDK for multiplayer games made with Unity, Unreal, and Godot. Its tick-based simulation supports client-side prediction and snapshot interpolation, while lag compensation addresses the delay between a client firing and the server registering a possible hit. Developers can choose full-consistency replication or eventual-consistency replication, which uses less bandwidth per object. Available network topologies include dedicated server, client host, and shared authority. Engine availability has qualifications: the product page lists all three engines, while documentation marks Unreal as early access and says Godot early access is available by contacting Photon. Dedicated-server use is described as a headless Unity build and requires third-party server orchestration at additional cost. Free plans include a 100-CCU option and a development-only option for 20 concurrent users. A one-time 100-CCU plan costs 95.00 USD for 12 months; monthly plans include 125.00 USD for 500 CCU. Premium Cloud is billed at 0.50 USD per CCU per month, with a 1,000 USD monthly minimum. All plans include online documentation, samples, tutorials, video streams, and help with account, billing, and service-status issues.