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Documentation Index

Fetch the complete documentation index at: https://docs.inworld.ai/llms.txt

Use this file to discover all available pages before exploring further.

Choose a plan and get credits each month to use across TTS, STT, LLM Router, and Realtime API (Speech to Speech). Higher tiers unlock features, volume discounts, increased limits and more.

Pricing

View the pricing page.

Portal Billing

View and manage your plan.

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Plans

On-DemandCreatorDeveloperGrowthEnterprise
PriceFree$25/mo$300/mo$1,500/moCustom
Best for      Prototyping        Individual creatorsProduction applicationsHigh-volume, complianceLarge-scale deployments, compliance
Please see our Pricing Page for more details about each plan, including model pricing, available features, and rate limits. Paid plans include credits equal to the plan price each billing cycle. Unused credits on all paid plans (Creator and above) roll over for up to 3 months with an active subscription. Your credit balance is displayed at the top of the Billing page. Credits are consumed by API and Playground usage across all products (TTS, STT, LLM Router, Realtime). You can upgrade your subscription at any time, and any unused credits from your previous plan will be credited to the new one. Any outstanding unpaid usage at the time of upgrade will be immediately charged. If you need more credits than provided in your selected plan, you can:
  • Add credits — Click Add credits to purchase more. The minimum purchase is $10. You will be redirected to a secure checkout page, and credits are applied immediately upon payment.
  • Auto-reload — Enable auto-reload to automatically purchase credits when your balance falls below a threshold you set. Configure the reload amount and threshold from the Billing page.
Enterprise accounts are billed per their agreement. Credit purchases are not available for enterprise plans.
To downgrade your plan or unsubscribe, please email support@inworld.ai.

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TTS pricing

On-Demand accounts include up to 40 minutes of TTS for free.
Text-to-Speech usage is billed per million characters synthesized across both the TTS Playground and the API. Get discounted rates by signing up for higher tiers. See Pricing Page for the latest pricing. Inworld TTS is also available for on-prem deployment. Contact sales for on-prem pricing.

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TTS features by plan

Available features vary by subscription tier, including:
  • Number of custom voices
  • Playground character limits
  • Workspace creation and sharing
  • Access to professional voice cloning
  • HIPAA & BAA
See the Pricing Page for a full breakdown of features by plan.

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TTS limits by plan

Your subscription plan determines how many requests can be processed simultaneously.
On-DemandCreatorDeveloperGrowthEnterprise
Concurrent generations2103550Custom
WebSocket connections20100350500Custom
Voice design API (requests/min)23515Custom
Voice cloning API (requests/min)23515Custom
Concurrency limits apply per account and are shared across API keys.
For conversational use cases like voice agents, most applications need far fewer concurrent generations than expected. Because speech is generated much faster than it is spoken, a single generation slot can serve multiple conversations. See Concurrency Limits for more information. To unlock higher limits, upgrade your plan or reach out to our team.