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What is Inworld TTS?

Inworld TTS emerges as a state-of-the-art text-to-speech technology that delivers remarkably lifelike and context-sensitive speech synthesis, complete with sophisticated voice-cloning capabilities, all at a highly competitive price point. Its flagship model, TTS-1, is designed for real-time applications, featuring low-latency streaming that provides the initial audio output in approximately 200 milliseconds and encompasses a broad spectrum of languages, including English, Spanish, French, Korean, and Chinese, among others. Developers can choose between instant zero-shot voice cloning, which requires merely 5 to 15 seconds of audio input, or more comprehensive fine-tuned cloning, which allows for the incorporation of voice-tags to express emotion, style, and non-verbal signals, while also facilitating seamless language transitions without compromising the distinct voice identity. Additionally, for users desiring enhanced expressiveness and multilingual support, the TTS-1-Max model is currently available in preview, showcasing improved functionalities. The platform supports multiple access methods, such as APIs and portal options, and can function in streaming or batch processing modes, making it adaptable for a wide array of uses, including interactive voice assistants, gaming avatars, and custom audio branding projects. With its innovative features and flexibility, Inworld TTS is set to transform the landscape of synthetic voice interactions and enhance user experiences across various domains. As users continue to explore the possibilities, the technology promises to pave the way for more engaging and personalized audio experiences.

What is Gradium?

Gradium provides a specialized voice AI platform designed for developers and businesses aiming to integrate speech functionalities and conversational interfaces into their applications. This platform features hosted APIs that offer a wide range of capabilities, such as streaming text-to-speech, converting speech to text, translating speech, and facilitating speech-to-speech interactions, with access available through both WebSocket and REST interfaces. In addition, it includes advanced features like real-time turn detection, adjustments for pronunciation, and options for voice design or cloning. Users can easily explore various models and manage voice settings through an intuitive web-based studio, while detailed documentation and SDK resources support the application development process. The potential use cases for this technology cover areas such as virtual voice agents, customer service automation, live transcription, multilingual voice interactions, and the generation of audible content. Furthermore, Gradium has launched Phonon, an open-weight text-to-speech model aimed at offline implementation within applications and on-device environments. The platform employs a credit-based payment model for services that include speech generation, transcription, and translation, providing users with both flexibility and scalability. By combining these diverse features and options, Gradium stands out as a highly adaptable solution for anyone seeking to enrich their applications with cutting-edge voice technology. The extensive capabilities offered by Gradium make it a vital tool in the rapidly evolving landscape of voice AI.

Media

Media

No images available

Integrations Supported

LiveKit
Claude
Claude Duet
Claude for Legal
Fireworks AI
Google AI Overviews
Groq
Inworld
Mistral AI
OpenAI
Tenstorrent DevCloud
Vapi AI
gpt-oss-20b

Integrations Supported

LiveKit
Eden AI
Pipecat

API Availability

Has API

API Availability

Has API

Pricing Information

$0.005 per minute

Pricing Information

$0/month
The free tier includes 45,000 credits. The XS plan is $13/month and includes 225,000 credits. Credits are shared across speech services; monthly plan credits do not roll over. Annual billing saves one month.
Free Version

Supported Platforms

SaaS
On-Prem

Supported Platforms

SaaS
On-Prem

Customer Service / Support

Web-Based Support

Customer Service / Support

Web-Based Support

Training Options

Documentation Hub
Online Training

Training Options

Documentation Hub

Company Facts

Organization Name

Inworld

Date Founded

2021

Company Location

United States

Company Website

inworld.ai/tts

Company Facts

Organization Name

Gradium

Date Founded

2025

Company Location

France

Company Website

gradium.ai/

Categories and Features

AI Voice Models

Not specified

Text to Speech

Not specified

Categories and Features

Speech to Text

Not specified

Text to Speech

Not specified

Voice Cloning

Not specified

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