irt.io vs Colyseus

Colyseus gives you server authority and schema-driven binary deltas — but you own and operate the server, and prediction, physics, voice, and testing are left to you.

irt.io is the same authority model with nothing to deploy, and the game-shaped layers Colyseus leaves out — client-side prediction as a default, Rapier physics that syncs, SFU voice in one call, and simulated players that verify it — are configuration, not code you write.

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