Inworld TTS

Inworld TTS

Inworld
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About

Hume Audio Decisions API is a hosted API for developers building voice applications and teams evaluating speech and sound. It accepts an audio recording, optional context, and user-defined questions, then returns probabilities for answers in structured form. Questions can cover observable audio facts, such as the number of speakers or background speech, and listener judgments about tone, naturalness, empathy, clarity, or frustration. Teams can use the results to review support calls, test voice agents and text-to-speech output, label speech corpora, compare recordings, and identify examples for escalation or model training. The API works as a decision layer alongside speech recognition and voice generation, allowing application code to use its scores and probabilities in custom workflows. API access is requested through Hume, and billing is based on audio, question, and context input tokens.

About

Inworld TTS is a state-of-the-art text-to-speech platform designed to deliver ultra-realistic, context-aware speech synthesis and precise voice-cloning capabilities at a radically accessible price. The flagship model, TTS-1, is optimized for real-time applications and supports low-latency streaming (first audio chunk in ≈200 ms) as well as multiple languages (including English, Spanish, French, Korean, Chinese, and more). Developers can use instant zero-shot voice cloning (5-15 seconds of audio) or professional fine-tuned cloning, add voice-tags for emotion, style, and non-verbal sounds, and switch languages while preserving voice identity. The larger TTS-1-Max model (in preview) offers even more expressive speech and multilingual strength. The platform supports both API and portal access, streaming or batch mode, and is designed for everything from interactive voice agents and gaming characters to branded audio experiences.

Platforms Supported

Windows Not Supported
Mac Not Supported
Linux Not Supported
Cloud Supported
On-Premises Supported
iPhone Not Supported
iPad Not Supported
Android Not Supported
Chromebook Not Supported

Platforms Supported

Windows Not Supported
Mac Not Supported
Linux Not Supported
Cloud Supported
On-Premises Supported
iPhone Not Supported
iPad Not Supported
Android Not Supported
Chromebook Not Supported

Audience

Developers building voice applications and product teams evaluating speech, calls, voice agents, or other audio data.

Audience

Developers and businesses looking for a tool offering multilingual voice synthesis and custom-voice cloning at scale

Support

Phone Support Not Supported
24/7 Live Support Not Supported
Online Supported

Support

Phone Support Not Supported
24/7 Live Support Not Supported
Online Supported

API

Offers API Supported

API

Offers API Supported

Screenshots and Videos

Screenshots and Videos

Pricing

$0.47/1M tokens
Usage costs $0.47 per 1 million input tokens, with no commitment. An organization receives a 1-million-input-token trial credit after access is granted. Enterprise plans offer volume pricing and deployment in a VPC, on premises, or in country.
Free Version Not Supported
Free Trial Not Supported

Pricing

$0.005 per minute
Free Version Not Supported
Free Trial Not Supported

Reviews/Ratings

Overall 0.0 / 5
ease 0.0 / 5
features 0.0 / 5
design 0.0 / 5
support 0.0 / 5

This software hasn't been reviewed yet. Be the first to provide a review:

Review this Software

Reviews/Ratings

Overall 0.0 / 5
ease 0.0 / 5
features 0.0 / 5
design 0.0 / 5
support 0.0 / 5

This software hasn't been reviewed yet. Be the first to provide a review:

Review this Software

Training

Documentation Supported
Webinars Not Supported
Live Online Not Supported
In Person Not Supported

Training

Documentation Supported
Webinars Not Supported
Live Online Supported
In Person Not Supported

Company Information

Hume AI
Founded: 2021
United States
www.hume.ai/products/decision-model-api

Company Information

Inworld
Founded: 2021
United States
inworld.ai/tts

Alternatives

No Alternatives

Alternatives

Eleven v4

Eleven v4

ElevenLabs
Qwen3-TTS

Qwen3-TTS

Alibaba
Chirp 3

Chirp 3

Google

Categories

AI Decision Models Supported

Categories

Integrations

Claude Not Supported
Claude Duet Not Supported
Claude for Legal Not Supported
Fireworks AI Not Supported
Google AI Overviews Not Supported
Groq Not Supported
Hume AI Supported
Inworld Not Supported
LiveKit Not Supported
Mistral AI Not Supported
OpenAI Not Supported
Tenstorrent DevCloud Not Supported
Vapi AI Not Supported
gpt-oss-20b Not Supported

Integrations

Claude Supported
Claude Duet Supported
Claude for Legal Supported
Fireworks AI Supported
Google AI Overviews Supported
Groq Supported
Hume AI Not Supported
Inworld Supported
LiveKit Supported
Mistral AI Supported
OpenAI Supported
Tenstorrent DevCloud Supported
Vapi AI Supported
gpt-oss-20b Supported
Claim Hume Audio Decisions API and update features and information
Claim Hume Audio Decisions API and update features and information
Claim Inworld TTS and update features and information
Claim Inworld TTS and update features and information