Inworld AI
A realtime voice API with Realtime TTS-2 text-to-speech, streaming speech-to-text and speech-to-speech, plus hosted open-model LLM inference, aimed at consumer apps.
About Inworld AI
Consumer voice apps such as companions, tutors and coaches need natural speech with low latency at a per-user cost that stays affordable at scale.
Who it’s for
- Developers building voice companions, tutors and other consumer voice apps
- Teams adding expressive, low-latency text-to-speech to a voice agent stack such as LiveKit Agents
When to consider it
Consider Inworld AI when you want realtime text-to-speech, speech-to-text and LLM inference billed from one credit balance, with voice cloning and voice design included on the free tier.
Tradeoffs & limitations
- The free On-Demand tier is pay as you go and includes up to 70 minutes of TTS; usage is billed at $25 per 1M characters for Realtime TTS-2 and $15 per 1M characters for Realtime TTS-2 Flash.
- Paid plans start at $25 a month (Creator), with credits equal to the plan price; HIPAA/BAA and zero data retention are add-ons from the $1,500-a-month Growth plan, and EU or India data residency is Enterprise only.
SOTA overview · Documentation-based assessment · Sources & review method
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Sources & review method
Documentation-based assessment · Nov 1, 2026 · Prepared with AI assistance; not a hands-on benchmark.
Checked by SOTA · AI-assisted documentation review. Selection advice is our assessment; verify current requirements for your deployment.
Import history & original evidence
Inworld AI official website
A realtime voice API with Realtime TTS-2 text-to-speech, streaming speech-to-text and speech-to-speech, plus hosted open-model LLM inference, aimed at consumer apps.
Based on official pages and announcements checked on 2026-11-01. No hands-on test, performance benchmark or popularity ranking is claimed.