Unity WebGL

Voice AI NPCs in the browser

Unity's Microphone class does not work in WebGL builds. The Neocortex SDK bridges the browser's microphone into Unity, so players can talk to characters in a web build.

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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 WebGL

1
Install the Unity SDK
Add the package from git URL:
https://github.com/neocortex-link/neocortex-unity-sdk.git
2
Switch to the WebGL template
Select the Neocortex WebGL template in Player Settings so the browser's audio reaches Unity.
3
Build and talk
Use the same voice components as desktop, build for WebGL and host over HTTPS.

Requirements

Unity 6 (6000.0) or later
HTTPS hosting (browsers require it for microphone access)
A free Neocortex account and API key

Read the Unity WebGL docs

What you get

Built for Unity WebGL developers

Microphone in WebGL

Browser audio bridged into Unity through the Neocortex template.

Same components

One microphone component for desktop, mobile and WebGL.

Streamed replies

Characters start speaking quickly instead of waiting for full audio.

No keys in the build

Keep secrets out of client code; meter usage with usage gating.

Visual editor

Design and test characters in the browser before you build.

Web API too

Not on Unity? Call characters from any web stack over HTTP.

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 WebGL: common questions

Why doesn't my Unity microphone work in WebGL?

Unity's Web platform documentation lists the Microphone class as not supported, because browsers handle microphone access themselves.

How does Neocortex enable voice in WebGL?

The Neocortex WebGL template connects the browser's microphone to Unity, and the SDK's audio components use it automatically.

Do I need HTTPS?

Yes. Browsers only grant microphone access on secure pages, and the microphone starts after a user gesture such as a click.

Can I run a local LLM in WebGL?

Local models are rarely practical in the browser because of download size and memory, so WebGL builds normally use cloud inference.

Comparing tools?

How Neocortex compares for Unity WebGL teams

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.

ElevenLabs Agents alternative

ElevenLabs Agents is a superb voice pipeline for web, mobile and phone. Games need more: an engine SDK, characters that act, and costs that do not grow with every minute of play.

Player2 alternative

With Player2, every player signs in to Player2 and spends their own credits, and NPCs stop answering when those run out. Neocortex keeps your players inside your game.

Put a talking NPC in your web build

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