EGO AI alternative
The EGO AI alternative you can ship in your own game
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.
- 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
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The short answer
EGO AI or Neocortex: which fits your game?
Side by side
EGO AI vs Neocortex: feature comparison
The facts that matter when you put AI characters in a game.
| Compared on | EGO AI |  Neocortex |
|---|---|---|
| What it is | Research lab and consumer character products | Developer platform for AI characters in games |
| Current product | yōkai, a consumer voice agent (waitlist) | Character editor, engine SDKs and Web API |
| Developer access | No public SDK, API or docs found | Unity SDK, Unreal plugin, Godot (beta), Web API |
| Availability | character.world and yōkai behind waitlists | Self-serve sign-up today |
| Pricing | None published | Free plan; paid plans from €9/month with monthly credits |
| Character design | Natural-language world building (announced) | Visual node editor: personality, emotion, knowledge, intents, actions |
| Voice | Voice-first consumer agent | Streaming TTS and STT, voice cloning from a 10-second sample, voice design |
What it is
EGO AI
Research lab and consumer character products
Neocortex
Developer platform for AI characters in games
Current product
EGO AI
yōkai, a consumer voice agent (waitlist)
Neocortex
Character editor, engine SDKs and Web API
Developer access
EGO AI
No public SDK, API or docs found
Neocortex
Unity SDK, Unreal plugin, Godot (beta), Web API
Availability
EGO AI
character.world and yōkai behind waitlists
Neocortex
Self-serve sign-up today
Pricing
EGO AI
None published
Neocortex
Free plan; paid plans from €9/month with monthly credits
Character design
EGO AI
Natural-language world building (announced)
Neocortex
Visual node editor: personality, emotion, knowledge, intents, actions
Voice
EGO AI
Voice-first consumer agent
Neocortex
Streaming TTS and STT, voice cloning from a 10-second sample, voice design
Competitor details checked against their own docs, pricing pages or public reporting in October 2026.
Fair is fair
What EGO AI does well
EGO AI is a Y Combinator-backed research lab working on making AI characters feel human, from research on human-like game bots to a voice companion mod for Valheim and a character engine announced in 2025. Its focus on natural conversation is genuinely interesting work.
Why teams switch
Why game teams choose Neocortex over EGO AI
Available today
Sign up, build a character and talk to it in minutes. No waitlist.
Your game, your characters
Characters live in your Unity, Unreal or Godot project, not in someone else's app.
Documented SDKs
Install steps, sample scenes and an API reference for every engine.
Clear pricing
A free plan and published paid plans with monthly credits.
Voice built in
Streaming voice in and out, voice cloning and voice design.
Built for studios
Visual editor for designers, actions and interactables for gameplay.
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
EGO AI alternative: common questions
Want the long version? Read the in-depth EGO AI comparison.
Does EGO AI have a Unity or Unreal SDK?
We found no public SDK, API or developer documentation from EGO AI for Unity, Unreal, Godot or the web. Unity and Unreal appear in its research work and internal demos.
What is yōkai?
yōkai is EGO AI's voice agent with personality and memory, presented on egoai.com with a waitlist in 2026.
What happened to character.world?
EGO AI announced character.world, a character engine, alongside a $6.7M seed round in October 2025. In October 2026 its site is a waitlist page.
Can I add AI NPCs to my own game with Neocortex?
Yes. Design characters in the visual editor and use them through the Unity SDK, Unreal plugin, Godot SDK (beta) or Web API. There is a free plan.
Put AI characters in your game today
Free plan, no credit card. Build a character in the browser and talk to it in minutes.
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Convai alternative
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NVIDIA ACE alternative
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Charisma.ai alternative
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Player2 alternative
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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
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Replica Studios alternative
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