Unity SDK

AI NPCs for Unity

Design a character in the browser, install the SDK from a git URL and talk to it in your scene. Text or voice in, text or voice out, on desktop, mobile and WebGL.

Get started for free

Free plan
No credit card
Unity, Unreal, Godot and Web API

Cora, the Neocortex AI character, waving hello

4
ways to integrate
Unity, Unreal, Godot, Web API
20+
languages
set per character
10 s
to clone a voice
or design one from text
€0
to start
free plan and editor testing

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From zero to a talking character in Unity

1
Design your character
Build personality, knowledge, emotion and actions in the visual editor, and test it in the browser for free.
2
Install the SDK
In Unity, open Package Manager, choose Add package from git URL and paste:
https://github.com/neocortex-link/neocortex-unity-sdk.git
3
Open a sample and talk
Import one of six sample scenes, add your API key and character ID, and press Play.

Requirements

Unity 6 (6000.0) or later
A free Neocortex account and API key

Read the Unity docs

What you get

Built for Unity developers

Six sample scenes

Text chat, audio chat, actions, interactables, group chat and usage gating.

One microphone component

Works on desktop, mobile and WebGL, with permissions and device selection.

WebGL voice

A WebGL template brings browser microphone input to Unity, which it lacks by default.

Actions and interactables

Characters perceive tagged objects and return actions your game executes.

Emotion on every line

Drive facial animation and tone from each reply's emotion tag.

Usage gating

Meter how much each player can use, right from the SDK.

How it works

Characters you design, not prompts you babysit

Personality, emotion, knowledge and world are nodes you connect, not prompts you rewrite.
Intents and actions turn what a player says into something your game does.
Test every character in the browser for free before it reaches your engine.

The Neocortex visual character editor with emotion, personality, language, voice, knowledge, intent and action nodes — A bartender character in the Neocortex editor.

What Our Customers Say

Discover what creators are saying about building with Neocortex.

After trying several Smart NPC providers, I came across Neocortex while looking for a stateful conversational AI solution for our Virtual Education platform. Neocortex stood out and topped all our key considerations.

Vallikat Peethamber

Managing Director

Neocortex opened scalable solutions for our VR platform, letting us create scenarios that make training more immersive. Keeping AI agents within clear boundaries is hard, but Neocortex handles it very well and makes customization easy.

Ottó Farkas

IT Specialist / Project Manager

In classroom practice, Neocortex and its action-based mechanism provide students with an out-of-the-box way to bridge conversational agents into software and hardware-based interaction design workflows.

Hongming Li

Lecturer / Instructor

I found out about Neocortex while I was working on my final-year project, and the platform's ease of integration and accessibility enabled me to seamlessly implement smart NPCs in my application. Highly recommend it!

Angela Pellillo

Backend Developer

Neocortex was the first step in bringing LLM-powered NPCs into a real Unity3D prototype, fast-tracking development and growing my TikTok account from 0 to 4000 followers within a month!

Brandan Chen

Associate Game Producer

Vallikat Peethamber

Managing Director

Ottó Farkas

IT Specialist / Project Manager

Hongming Li

Lecturer / Instructor

Angela Pellillo

Backend Developer

Neocortex was the first step in bringing LLM-powered NPCs into a real Unity3D prototype, fast-tracking development and growing my TikTok account from 0 to 4000 followers within a month!

Brandan Chen

Associate Game Producer

Proven at the Supercell Global AI Game Hackathon

Neocortex powered all three top games in a category, plus the winner of a second category.

Read the story

FAQ

Neocortex for Unity: common questions

Which Unity versions does Neocortex support?

The Neocortex Unity SDK requires Unity 6 (6000.0) or later.

How do I install the Neocortex Unity SDK?

Open Package Manager, choose Add package from git URL and paste https://github.com/neocortex-link/neocortex-unity-sdk.git.

Does voice work in Unity WebGL builds?

Yes. Unity does not support microphone input in WebGL by default; the Neocortex SDK adds it through its WebGL template.

Can I run models locally in Unity?

You can prototype with open models running locally through Ollama in Unity. Studios can also run the Neocortex platform on their own infrastructure.

Comparing tools?

How Neocortex compares for Unity teams

Inworld AI alternative

Inworld moved its focus to voice and inference for consumer apps and retired Character Studio. Neocortex keeps character design visual, game-first and in your engine.

Convai alternative

Convai counts every character reply against a monthly quota, with concurrency set per API key. Neocortex gives game teams monthly credits, free editor testing and characters designers control.

NVIDIA ACE alternative

NVIDIA ACE is a powerful on-device toolkit for Unreal Engine 5 and RTX GPUs. If you build in Unity, ship to mobile or the web, or lack a C++ team, Neocortex gets you a talking character today.

Talk to your character in Unity today

Free plan, no credit card. Build a character in the browser and talk to it in minutes.