Inworld TTS

Inworld TTS

Inworld
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About

Grok Text to Speech (TTS) is a standalone audio API built to help developers generate fast, natural, and expressive speech from text. Built on the same stack that powers Grok Voice, Tesla vehicles, and Starlink customer support, the API makes it straightforward to integrate high-quality voice generation into applications such as voice agents, accessibility tools, podcasts, assistants, customer experiences, and interactive audio products. Grok TTS can turn long-form text into speech through a REST API or generate speech in real time through a WebSocket API, giving developers flexibility for both batch audio generation and live conversational experiences. It is designed around expressive delivery, not just flat narration, with fine-grained control through simple inline and wrapping speech tags. Developers can add natural prosody and emotion using tags, allowing lifelike delivery without complex markup.

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 Not 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 that need fast, accurate multilingual speech recognition and transcription for voice agents, accessibility tools, and real-time applications

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

No information available.
Free Version Not Supported
Free Trial 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

SpaceXSI
Founded: 2023
United States
x.ai/news/grok-stt-and-tts-apis

Company Information

Inworld
Founded: 2021
United States
inworld.ai/tts

Alternatives

Alternatives

Qwen3-TTS

Qwen3-TTS

Alibaba
Grok Voice 3.0

Grok Voice 3.0

SpaceXSI
Chirp 3

Chirp 3

Google

Categories

Categories

Integrations

Claude Not Supported
Fireworks AI Not Supported
Google AI Overviews Not Supported
Grok Supported
Groq Not 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
Fireworks AI Supported
Google AI Overviews Supported
Grok Not Supported
Groq Supported
Inworld Supported
LiveKit Supported
Mistral AI Supported
OpenAI Supported
Tenstorrent DevCloud Supported
Vapi AI Supported
gpt-oss-20b Supported
Claim Grok Text to Speech (TTS) and update features and information
Claim Grok Text to Speech (TTS) and update features and information
Claim Inworld TTS and update features and information
Claim Inworld TTS and update features and information