# How Ego uses Cartesia

As published on [cartesia.ai](https://www.cartesia.ai/customers/ego), November 2024. Captured by usedby on 2026-10-08.

- Company: [Ego](https://www.usedby.ai/companies/ego.md)
- Tool: [Cartesia](https://www.usedby.ai/tools/cartesia.md)

## What the story says

Ego builds an AI-native simulation engine for creating 3D characters, worlds and game scripts, and uses Cartesia's Sonic text-to-speech, voice cloning and voice changer to give its AI companions and NPCs real-time, emotionally expressive voices. This powers Thrall, a Valheim game mod where players direct an AI companion by voice.

Summary written by usedby from the source page, in English. The figures are those of Cartesia and Ego, not ours.

> Ego’s launch of Thrall represents a breakthrough in NPC design—players can use natural voice commands to direct it in performing any task a human player would do, from gathering resources to engaging in combat.

> Gaming has always been where communities form - from my generation’s World of Warcraft and Runescape to today’s Roblox and Minecraft. As games evolve into social platforms, AI characters need to feel genuinely human in both their responsiveness and emotional depth. Cartesia’s technology, with its ultra-low latency, natural voices, and precise emotional control, helps us create truly immersive worlds where AI characters feel alive and authentic.
>
> Peggy Wang, Co-Founder and CTO, Ego

## What usedby checked

We compared the story with its live page on 2026-10-08.

- Checked: the passage quoted above is copied word for word from the page, near the name of Ego.
- Checked: each number in our summary is printed on the page.
- Checked: the publication date is read from the page’s own metadata, never guessed.
- Checked: Ego uses Cartesia. Confirmed line. Latest check across sources: 2026-10-08.
- Not checked: the result itself. We quote it; we did not measure it.

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Source: https://www.usedby.ai/case-studies/ego-cartesia · How we check: https://www.usedby.ai/methodology