Tool

Inworld AI

Real-time voice AI platform (TTS, STT, LLM routing) used to power interactive characters and voice apps.

Free tier

Yes

Starting price

$25/mo

Pricing

Free On-Demand tier includes limited TTS/STT minutes, then pay-as-you-go. Product is now a general voice/AI runtime rather than a dedicated NPC engine.

Updated

17 Oct 2026

Open tool

• voice
• tts
• npc
• realtime

Picked for

• Which AI tool should I use to add AI NPC dialogue to my game? Rank 2

Sources

• inworld.ai — pricing
• docs.inworld.ai — billing