What is ESX and CFX?

FiveM Server Development Server Discussion
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Hi! I don’t know what is ESX. What is ESX? What is CFX?

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Helpful kypo here,

Hi there thanks for your inquiry here is some info

ESX Framework
ESX is a framework built on and for FiveM the multiplayer modification framework for GTA V and generally use to make roleplay servers

Cfx.re - enabling enhanced experiences
Cfx, aka CitizenFX is the people behind the Rage Titles modifications such as GTA5(FiveM), Red Dead Redemption 2(RedM) Modification framework