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Inworld AI alternative

The Inworld alternative that still lets you design characters

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.

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  • Free plan
  • No credit card
  • Unity, Unreal, Godot, Web SDK and Web API
Cora, the Neocortex AI character, waving hello

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Overview

What is Inworld AI?

Inworld AI sells voice and inference infrastructure: text-to-speech, speech-to-text, speech-to-speech voice agents and open-model inference, aimed at consumer apps. Its Character Studio for game characters has been retired.

The short answer

Inworld AI or Neocortex: which fits your game?

Choose Inworld AI if you want

  • Teams that want voice and inference infrastructure
  • Consumer apps such as companions, learning and fitness
  • Engineers happy to build character logic in code

Choose Neocortex if you want

  • Game teams that want designers to own characters
  • Studios migrating off Character Studio or the legacy Unity SDK
  • Projects that need Unity, Unreal, Godot and web from one character

Side by side

Inworld AI vs Neocortex: feature comparison

The facts that matter when you put AI characters in a game.

Main focus

Inworld AI

Voice and inference for consumer apps

Neocortex

AI characters for games

Character design

Inworld AI

Code-first Agent Runtime (Character Studio retired)

Neocortex

Visual node editor: personality, emotion, knowledge, intents, actions

Unity

Inworld AI

New Runtime SDK; legacy Asset Store SDK deprecated

Neocortex

Unity SDK with six sample scenes

Other engines

Inworld AI

Unreal Runtime SDK, APIs

Neocortex

Unity SDK, Unreal plugin, Godot (beta), Web SDK, Web API

Voice

Inworld AI

TTS and STT

Neocortex

Streaming TTS and STT, voice cloning from a 10-second sample, voice design

Local AI

Inworld AI

No on-device option documented

Neocortex

Local LLMs in Unity via Ollama; self-hosted platform for studios

Pricing

Inworld AI

Usage-metered TTS, STT and tokens, plus monthly plans

Neocortex

Free plan; paid plans from €9/month with monthly credits

Competitor details checked against their own docs, pricing pages or public reporting in October 2026.

Why teams switch

Why game teams choose Neocortex over Inworld AI

Visual character design

Personality, emotion, knowledge, intents and actions are nodes your writers can edit and test in the browser.

Built for games

Games are the core of what we build, not one vertical among many.

Characters that act

Actions and interactable scene objects turn conversation into gameplay.

Voice included

Clone a voice from a short sample or design one from a description, streamed to the player.

Every engine

Unity, Unreal, Godot (beta) and a Web API, all using the same character.

Easy migration

Inworld descriptions, facts and goals map straight onto Neocortex nodes.

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.
neocortex.link/dashboard/characters
Neocortex visual character editor: emotion, personality, accent, language, voice and knowledge nodes connected to an agent, with intents mapped to in-game actions

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

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

From idea to playable character in a weekend

Game-jam teams use Neocortex to put talking, acting AI characters into playable games within a single weekend.

Read a game jam story

FAQ

Inworld AI alternative: common questions

Want the long version? Read the in-depth Inworld AI comparison.

Is Inworld Character Studio still available?

No. Inworld retired Character Studio. Neocortex gives you the same visual character design, personality, knowledge, voice and actions in one editor, with SDKs for Unity, Unreal and Godot.

Is the Inworld Unity SDK deprecated?

Yes. The Asset Store package is no longer supported. The Neocortex Unity SDK installs from a git URL in Unity 6 and ships with six sample scenes.

How do I move my Inworld characters to another platform?

Rebuild them in Neocortex: the description becomes the Agent node, facts become Knowledge, and goals and triggers become Intents and Actions. Most characters take a few minutes.

What is the best Inworld AI alternative for games?

Neocortex. It is built for game characters, with a visual editor, voice cloning, actions your game can execute, and a free plan.

Rebuild Inworld NPCs visually

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

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More comparisons

All comparisons

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NVIDIA ACE is an 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.

Charisma.ai alternative

Charisma.ai's homepage now leads with online training and campaigns. Neocortex is focused on characters players talk to, fight beside and trade with.

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.

ElevenLabs Agents alternative

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

Hume EVI alternative

Hume's documentation says its EVI and TTS APIs are being sunset on November 13, 2026, with account data deleted afterwards. Neocortex gives your characters a new home with voice in and out.

Replica Studios alternative

Replica Studios closed on June 30, 2025, and its API went offline. Neocortex gives you character voices again, plus NPCs that listen and answer.

EGO AI alternative

EGO AI has moved from an AI game engine to character.world and now yōkai, a consumer voice agent, with no public SDK or API. Neocortex puts AI characters in your Unity, Unreal or Godot game today.