Amazon GameLift Servers vs GameNetworkingSockets

Amazon GameLift Servers is a paid service for deploying, operating, and scaling dedicated cloud servers for session-based multiplayer games. It supports managed EC2 fleets, managed container fleets, and Anywhere fleets using customer-managed resources. AWS says servers can run in 26 Regions and 9 Local Zones across five continents, with 99.99% availability, while autoscaling can launch thousands of servers and reduce unused capacity. FlexMatch matches up to 200 players using rules such as skill or latency. Enhanced DDoS Protection is enabled by default at no additional charge, and Player Gateway can hide server IP addresses through relays. Integrations include Unreal Engine, Unity, O3DE, C++, C#, Go, Pragma, Heroic Labs/Nakama, and AccelByte. Dashboards, logs, CloudWatch alarms, and telemetry integrations support operations. Player platforms include PC, PlayStation, Xbox, Nintendo, mobile, web, and AR/VR, with cross-play on shared servers. New AWS customers may use the Free Tier for up to 12 months, subject to limits. Managed container fleets run on Linux only.

GameNetworkingSockets is a free BSD-3-Clause transport library for games that sends reliable and unreliable messages over UDP. It handles messages larger than the underlying MTU through fragmentation and reassembly, with retransmission for reliable messages. Packets use AES-GCM-256, while Curve25519 supports key exchange and certificate signatures. Peer-to-peer connections can use Google WebRTC ICE for NAT traversal, with an option to plug in a signaling service. Multiple message lanes can share one connection under strict priorities or weighted bandwidth rules. Included diagnostics simulate packet latency and loss and measure detailed statistics. The library is written in C++ and also exposes a plain C interface; third-party bindings are listed for C#, Go, and Rust. Build instructions cover Linux, Windows, macOS, and iOS. Steam is not required for the open-source library, but authentication, signaling, and Steam Datagram Relay remain Steam-only services. Higher-level entity serialization, delta encoding, and compression are not included.