Editing VRChat Inc. (section)

== Key Technical Systems ==

{| class="wikitable" style="width:100%;"
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! System !! Introduced !! Purpose || Current Status
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| VRChat SDK2 || 2017 || Original world and avatar creation toolkit || Deprecated August 2023; legacy support only
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| Avatar 3.0 (SDK3) || 2020 || Expanded avatar expression; Action Menu; state machines || Active — current standard
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| Udon || April 2020 || Node-graph visual scripting for worlds || Active; replaced all prior scripting approaches
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| UdonSharp || 2020 || C# compiler for Udon; community-developed (Merlin_VT); later officially adopted || Active
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| VRChat Creator Companion (VCC) || 2022–2023 || Unity package manager for SDK installations || Active
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| PhysBones || April 21, 2022 || Native physics bones; replaced Dynamic Bones; enabled avatar interactions || Active — platform standard
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| Open Sound Control (OSC) || 2022 || External device/software integration protocol || Active
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| Easy Anti-Cheat (EAC) || July 25, 2022 || Anti-modification client security || Active; controversial (see below)
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| Impostors || January 2024 || Auto-generated avatar fallbacks for cross-platform viewing || Active
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| Age Verification (Persona) || November 2024 || 18+ instance gating via third-party identity verification || Active
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| Udon 2 ("Soba") || 2025–2026 || Next-generation scripting; showcased NYE 2026 event || In development / early deployment
|}