Inworld AI — AI Voice

What is Inworld AI?

Inworld AI is a real-time voice AI platform that provides top-ranked text-to-speech (TTS), speech-to-text (STT), and LLM routing, engineered for natural, emotionally engaging conversations. It solves the problem of robotic-sounding AI voices by delivering sub-130ms latency, voice cloning from 15 seconds of audio, and advanced tone steering via bracketed instructions.

Who is it for?

Inworld AI is ideal for developers, content creators, and enterprises building voice-first applications—such as AI companions, agentic workforce tools, learning & education platforms, health & wellness apps, and interactive media. It is not designed for simple text-only chatbots or non-realtime use cases.

Key use cases

Use Inworld AI to power emotionally expressive voice agents that respond naturally in 100+ languages, clone voices for localization without accent carryover, and reduce cloud costs by up to 50% compared to alternatives like ElevenLabs and Deepgram. Its LLM Router provides access to 220+ models, optimizing both cost and quality.

• Realtime TTS-2 — #1 ranked realtime text-to-speech with sub-130ms first-chunk latency and advanced voice direction.
• Voice cloning — Create a custom voice from 15 seconds of audio and speak 15 languages as a native speaker with no accent carryover.
• Steerable voice design — Describe accent, age, tone, and energy in natural language to generate production-ready voices without recording.
• LLM Router — Route requests across 220+ LLM models to balance cost, latency, and response quality.
• Cross-lingual support — Deploy in 100+ languages including English, Spanish, French, Korean, Chinese, Hindi, Japanese, and German.
• Realtime STT — Speech-to-text at $0.10/hour on Growth plan with sub-250ms latency.
• Scalable plans — From free On-Demand to enterprise with dedicated GPUs, HIPAA/BAA compliance, and on-prem deployment.

Inworld AI pricing: from $25/mo.

For comparison: the median starting price in AI Voice is $10/month, measured across 54 tools we track. See the full SaaS Pricing Index →

On-Demand (Free)

Evaluation and prototyping. Includes up to 70 minutes of TTS, 100 custom voices, voice cloning & design, Realtime API access, 220+ LLM models via Router, and commercial license. TTS-2 at $25/1M chars, STT at $0.15/hour, LLMs at cost.

Creator ($25/month)

$25 in credits per month, up to 33% off TTS & STT rates, 500 custom voices, 40K chars per TTS Playground request, workspace creation & sharing, team management, plus everything in On-Demand.

Builder ($100/month)

$100 in credits per month, up to 40% off TTS & STT rates, 3,000 custom voices, increased concurrency limits, workspace & team features, plus everything in Creator.

Developer ($300/month)

$300 in credits per month, up to 47% off TTS & STT rates, 10,000 custom voices, increased concurrency limits, professional voice cloning (add-on), priority email support, plus everything in Builder.

Growth ($1,500/month)

$1,500 in credits per month, up to 53% off TTS & STT rates, 30,000 custom voices, higher API concurrency, 1 professional voice clone, ZDR, HIPAA & BAA add-ons, plus everything in Developer.

Enterprise (Custom)

Custom pricing, limits & terms. TTS-2 as low as $5/1M chars, STT custom, LLMs custom. Includes custom limits, SLA & DPA, on-prem deployment, EU & India data residency, dedicated AM & Slack channel, plus everything in Growth. Contact sales for a quote.

Start free with the On-Demand plan—no credit card required.

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