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AI voices and NPC dialogue for games

Voice tools turn your script into character voice lines you can drop into your video game. NPC dialogue platforms go further: they let players talk to AI characters live, usually through a Unity or Unreal plugin. Free voice plans often don't include commercial use.

4 voices & NPC dialogue compared

  • ElevenLabs

    Voices + sound effects

    Free planFrom $6/moDetails

    Character voices, narration and sound effects for games

    AI audio platform: type a script or describe a sound to generate speech, sound effects or music, with voice cloning and dubbing too. Good for game character dialogue and narration, with 5,000+ voices in 90+ languages.

    • Text-to-speech with 5,000+ voices
    • Sound effects and music generation
    • Voice cloning and dubbing
    • APIs and SDKs for developers

    Full detailsRead the guide

    Free tier
    10k credits/mo (commercial license starts at Starter)
    Paid plans
    • Starter $6/mo
    • Creator $22/mo
    • Pro $99/mo
    Checked
    Oct 19, 2026
    Try ElevenLabs

  • Inworld AI

    NPC dialogue, TTS, STT, LLM

    Free planFrom $25/moDetails

    Low-latency voices and live NPC dialogue via API

    Realtime voice and inference API for developers: text-to-speech, speech-to-text, speech-to-speech and many LLMs through one API, with games listed as a use case. Good for wiring spoken NPC dialogue into a game; API-first, not no-code.

    • Realtime text-to-speech for live dialogue
    • Speech-to-text and speech-to-speech
    • One API for many LLMs
    • CLI and MCP for coding agents

    Full details

    Free tier
    On-Demand $0 pay-as-you-go with included trial TTS minutes
    Paid plans
    • Creator $25/mo
    • Builder $100/mo
    • Developer $300/mo
    • Growth $1,500/mo
    • Enterprise custom
    Checked
    Oct 19, 2026
    Try Inworld AI

  • Convai

    AI characters and NPC dialogue

    Free planFrom $29/moDetails

    Talking AI NPCs inside Unity or Unreal scenes

    Platform for conversational AI characters. Define a character's look, voice, knowledge and traits in Convai Playground, then add it to a game via the Unity SDK or Unreal plugin, where it talks in real time and can perceive and act in the scene.

    • Character builder for voice and knowledge
    • Unity SDK and Unreal Engine plugin
    • Real-time perception and actions
    • No-code Avatar Studio experiences

    Full details

    Free tier
    Free $0 plan, 100 interactions/mo and 60 min of cloud-rendered Avatar Studio/Convai Sim
    Paid plans
    • Indie Dev $29/mo ($22/mo yearly)
    • Professional $99/mo ($69/mo yearly)
    • Scale $499/mo ($299/mo yearly)
    • Business $1,199/mo ($499/mo yearly)
    Checked
    Oct 19, 2026
    Try Convai

  • Charisma.ai

    Conversational character experiences

    No free planDetails

    Scripted branching conversations with AI characters

    Platform for interactive conversational stories. Build scenes in a graph editor mixing scripted and generative dialogue, with memories, emotions and voices, then play them on the web or in Unity or Unreal via its SDKs. Now marketed mainly for training.

    • Graph-based story and dialogue editor
    • Memories, emotions and AI voices
    • Unity and Unreal plug-and-play SDKs
    • Pay-as-you-go Pro plan

    Full details

    Free tier
    No free plan listed on the pricing page
    Paid plans
    • Pro pay-as-you-go: $5 per 50,000 credits (~200 experience minutes)
    • Enterprise custom
    Checked
    Oct 19, 2026
    Try Charisma.ai

Not sure which one fits? Answer a few questions about your game and get one pick, plus the tools to pair with it.

Get matchedRead the guide: Best AI tools for game audioCompare all tools

How to choose

  • Decide if you need recorded voice lines (text-to-speech) or live conversations with characters (an NPC platform).
  • For live NPCs, check for a plugin or SDK for your engine.
  • Check commercial use. Some free voice plans don't allow commercial use.
  • Only clone a voice you have permission to use.

Guides

Questions people ask

Can I use AI voices in a commercial game?

Usually on paid plans. ElevenLabs' commercial license starts at Starter, and Inworld lists a commercial license on every plan.

What's the difference between AI voice and AI NPC tools?

Voice tools make audio files from a script. NPC platforms like Convai, Charisma and Inworld power characters that respond to players in real time.

Which AI NPC tools work with Unity and Unreal?

Convai has a Unity SDK and an Unreal Engine plugin, and Charisma has plug-and-play SDKs for both.

Can I use AI voices in a mod?

Use original voices only. ElevenLabs bans cloning a living person's voice without consent, and Nexus may remove AI voices after a rights-holder complaint. See [AI tools for game modding](/guides/ai-tools-for-game-modding/).