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Inworld

AI infrastructure and text to speech; formerly an NPC character studio.

NPCs & dialogueVoice
From $25/mo
starting price
Visit Inworld

Overview

Inworld: AI infrastructure and text to speech; formerly an NPC character studio. It scores 86/100 in our audio, voice & NPCs ranking. Best for: Studios building voiced, conversational characters.

Inworld started as an AI NPC character platform and has moved toward B2B AI infrastructure and text-to-speech models.

Pros

  • Limited free tier
  • Commercial use allowed
  • Works with Unity, Unreal
  • Unity SDK
  • Unreal SDK
  • Built-in voice

Cons

  • Needs technical skills
  • Long-term memory: limited (Realtime API keeps memory per session; your app must save and restore it between sessions)
  • Runs on device: limited (On-device text to speech is in private preview, by request)
  • Speech to speech: limited (Realtime API does spoken conversations; no voice changer to re-voice your recordings)

Inworld pricing

On-Demand
Free

Pay as you go, up to 70 min TTS included

CreatorCheapest paid
$25/mo
Builder
$100/mo
Developer
$300/mo
Enterprise
Custom

Monthly prices in USD as listed by Inworld. Last checked 2026-10-21. Rights: Commercial licence on every plan incl. free On-Demand; must have rights to any voice you clone

Features

  • Unity SDK Unity 2022.3 LTS or later; Windows, Mac, Android and iOS Yes
  • Unreal SDK Yes
  • Built-in voice Yes
  • Long-term memory Realtime API keeps memory per session; your app must save and restore it between sessions Partly
  • NPCs trigger game actions Tool calling lets the AI call functions your game handles Yes
  • Runs on device On-device text to speech is in private preview, by request Partly
  • Voice cloning Yes
  • Design a voice from a description Yes
  • Emotion and delivery control Natural-language delivery steering on TTS-2, plus emotion tags Yes
  • Multiple languages 100+ languages Yes
  • Speech to speech Realtime API does spoken conversations; no voice changer to re-voice your recordings Partly
  • API Yes

Checked against Inworld's own site, docs and pricing page. How we check

Score breakdown: 86/100

  • Accessibility 21%
    62
  • Output & integration 17%
    86
  • Commercial rights 21%
    100
  • Value 9%
    75
  • Maturity 9%
    100
  • Game focus 9%
    100
  • Features 15%
    90

Based on price, free plan, commercial rights, exports and features. How we score

#8 AI Tools for Unity #4 AI Tools for Unreal Engine #2 AI NPC & Character Dialogue Tools

Inworld alternatives

All alternatives

  • Convai

    Hosted conversational NPCs for Unity, Unreal and the web.

    Free planCommercial use OK
    Free plan
    Paid plans from $29/mo
    Visit

  • NVIDIA ACE

    NVIDIA's digital human and NPC middleware: Audio2Face, speech, on-device models.

    Free planCommercial use OK
    Free
    Visit

  • Charisma.ai

    Branching story and emotion engine for interactive characters.

    Commercial use OK
    From $5/mo
    starting price
    Visit

Compare Inworld

Compare with Convai and NVIDIA ACE
Convai vs Inworld Inworld vs NVIDIA ACE Charisma.ai vs Inworld

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