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.
- Free plan
- No credit card
- Unity, Unreal, Godot and Web API
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
Powered by Industry Leaders
The short answer
Inworld AI or Neocortex: which fits your game?
Side by side
Inworld AI vs Neocortex: feature comparison
The facts that matter when you put AI characters in a game.
| Compared on | Inworld AI |  Neocortex |
|---|---|---|
| Main focus | Voice and inference for consumer apps | AI characters for games |
| Character design | Code-first Agent Runtime (Character Studio retired) | Visual node editor: personality, emotion, knowledge, intents, actions |
| Unity | New Runtime SDK; legacy Asset Store SDK deprecated | Unity SDK with six sample scenes |
| Other engines | Unreal Runtime SDK, APIs | Unity SDK, Unreal plugin, Godot (beta), Web API |
| Voice | Excellent TTS and STT | Streaming TTS and STT, voice cloning from a 10-second sample, voice design |
| Local AI | No on-device option documented | Local LLMs in Unity via Ollama; self-hosted platform for studios |
| Pricing | Usage-metered TTS, STT and tokens, plus monthly plans | Free plan; paid plans from €9/month with monthly credits |
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 API
Voice
Inworld AI
Excellent 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.
Fair is fair
What Inworld AI does well
Inworld built some of the best AI voices and inference infrastructure on the market. If you only need top-tier TTS or a speech-to-speech agent and plan to write all character logic in code, its current platform is strong.
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.
What Our Customers Say
Discover what creators are saying about building with Neocortex.
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's documentation says Character Studio has been retired, with characters, scenes, triggers and knowledge removed, and points developers to its code-first Agent Runtime.
Is the Inworld Unity SDK deprecated?
The legacy Inworld package on the Unity Asset Store is listed as no longer available for purchase and no longer supported by the publisher. Inworld now offers a separate Runtime SDK.
How do I move an Inworld character to Neocortex?
Recreate it in the Neocortex editor: the description becomes the Agent node, facts become Knowledge, and goals and triggers become Intents and Actions. Most characters take minutes.
Is Neocortex free?
Neocortex has a free plan, and testing characters in the browser editor does not use credits. Commercial use starts on the Pro plan.
Rebuild your Inworld characters visually
Free plan, no credit card. Build a character in the browser and talk to it in minutes.
More comparisons
All comparisonsConvai 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.
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 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.
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.