Inworld
Inworld is a #1 ranked realtime voice AI platform with ultra-low latency TTS, voice cloning, and LLM routing for conversational AI at scale.
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What is Inworld?
Inworld is an AI platform for building realtime voice and conversational applications, with a strong focus on games, interactive media, and consumer experiences. It combines products for text-to-speech, speech-to-text, LLM routing, and agent runtime so developers can build end-to-end conversational experiences in one stack.
A core part of the platform is its realtime TTS offering, which includes multiple voice models, instant voice cloning, voice design, multilingual support, timestamps, and controls such as speaking rate and temperature. The site also emphasizes the Realtime API and Agent Runtime, which are meant to help developers create workflows, agents, and full conversational pipelines rather than just standalone voice output.
Inworld appears to be aimed primarily at developers and product teams building production voice apps, game NPCs, AI companions, assistants, and other interactive systems. The website repeatedly highlights use cases like prototyping, content creation, production applications, high-volume deployments, and compliance-sensitive enterprise use.
The platform also includes a portal for API keys, playgrounds, logs, traces, dashboards, and experiments, which suggests it is designed for both experimentation and operational monitoring. That makes it useful for teams that need to iterate on voice quality, latency, prompts, and model choices while also shipping at scale.
Inworld pricing
Pricing model: Free
Inworld offers five tiers: On-Demand, Creator, Developer, Growth, and Enterprise. On-Demand is free and positioned for evaluation and prototyping; it includes up to 40 minutes of TTS, 100 custom voices, voice cloning and voice design, realtime API access, 220+ LLM models via Router, a commercial license, and community support. Creator costs $25/month and adds $25 in credits per month, 500 custom voices, audio downloads, 40K characters per TTS Playground request, workspace creation and sharing, and everything in On-Demand. Developer costs $300/month and includes $300 in credits, up to 20% off rates, 10,000 custom voices, increased concurrency limits, workspace creation and sharing, priority email support, and all Creator features. Growth costs $1,500/month and includes $1,500 in credits, up to 40% off rates, 30,000 custom voices, higher API concurrency and limits, professional voice cloning as an add-on, ZDR/HIPAA/BAA as add-ons, and everything in Developer. Enterprise is custom priced and includes custom limits, SLA/DPA, on-prem deployment, EU and India data residency, and dedicated account support; the site says Enterprise rates can be as low as $10 per 1M characters for Realtime TTS-2 and 1.5 Max and $5 per 1M for 1.5 Mini.
Inworld pros
- Realtime TTS and conversational AI in one platform
- Built for games and interactive media
- Agent Runtime for workflows and voice agents
- Multiple TTS models available
- Instant voice cloning support
- Voice design tools included
- Multilingual TTS support
- Speech-to-text included
- LLM Router with 220+ models
- Playground for testing voices
- API key management in portal
- Traces and logs for debugging
- Dashboards for monitoring
- Experiments for A/B testing variants
- Workspace creation and sharing
- Commercial license on lower tiers
- Compliance options for enterprise use
- High concurrency on larger plans
- Audio downloads on paid plans
- Priority email and AM support on higher tiers
Inworld cons
- TTS and usage can get expensive at higher volumes
- Free tier has limited included minutes
- Audio downloads are not on the free tier
- Workspace sharing is not included on the free tier
- Professional voice cloning is an add-on on Growth
- HIPAA and BAA are not included on lower tiers
- Zero data retention is an add-on on Growth
- On-prem deployment is only for Enterprise
- Enterprise pricing is custom and requires sales contact
- LLM usage is billed at provider cost separately
- Playground request limits are capped by tier
- Concurrent request limits are low on On-Demand
- Some features depend on plan upgrades
- Overage usage is charged at the plan rate
- Support quality varies by tier
Frequently asked questions about Inworld
What is Inworld designed for?
Inworld is designed for realtime AI applications, especially games, interactive media, and consumer-facing voice experiences. The site positions it as an AI engine that helps developers create conversational characters, agents, and workflows with TTS, STT, LLM routing, and runtime tools.
Which products are included in the platform?
The platform includes Realtime TTS, Realtime STT, a Realtime Router for LLM selection, a Realtime API, and Agent Runtime. The pricing page also shows that these products are managed from the same platform and can be used together through shared credits.
Does Inworld have a free plan?
Yes. The On-Demand tier is free and is intended for evaluation and prototyping. It includes up to 40 minutes of TTS, 100 custom voices, realtime API access, voice cloning and voice design, and access to the LLM Router.
What does the Creator plan include?
Creator costs $25 per month and adds $25 in credits each billing cycle. It includes 500 custom voices, audio downloads, 40K characters per TTS Playground request, workspace creation and sharing, and all On-Demand features.
What makes the Developer plan different?
Developer is aimed at production applications and costs $300 per month. It includes $300 in credits, lower per-unit rates than Creator, 10,000 custom voices, higher concurrency limits, workspace creation and sharing, priority email support, and all Creator features.
What is included in Growth?
Growth costs $1,500 per month and is aimed at large deployments and compliance-sensitive use cases. It includes $1,500 in credits, up to 40% off rates, 30,000 custom voices, higher concurrency and limits, and add-ons for professional voice cloning, zero data retention, HIPAA, and BAA.
Is Enterprise custom?
Yes. Enterprise pricing and terms are custom, and the plan is positioned for large-scale deployments. The site lists custom limits, SLA and DPA, on-prem deployment, EU and India data residency, and dedicated account support as Enterprise benefits.
How does credit usage work?
Paid plans include monthly credits equal to the plan price, and those credits are used across Inworld products. Unused credits on paid plans can roll over for up to 3 months while the subscription remains active, and additional credits can be purchased or added through auto-reload.
Are voice cloning and voice design available?
Yes, both are part of the platform, but availability varies by tier. The pricing page shows instant voice cloning and voice design on the free On-Demand tier, while professional voice cloning is listed as a Growth add-on.
What support options are available?
Support scales with the plan. On-Demand and Creator include community support, Developer and Growth include priority email support, and Enterprise includes a dedicated account manager and Slack channel.