Grok Text to Speech (TTS)SpaceXSI
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Inworld TTSInworld
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Related Products
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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.
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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.
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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
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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
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Audience
Developers that need fast, accurate multilingual speech recognition and transcription for voice agents, accessibility tools, and real-time applications
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Audience
Developers and businesses looking for a tool offering multilingual voice synthesis and custom-voice cloning at scale
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Support
Phone Support
Not Supported
24/7 Live Support
Not Supported
Online
Supported
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Support
Phone Support
Not Supported
24/7 Live Support
Not Supported
Online
Supported
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API
Offers API
Supported
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API
Offers API
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Screenshots and Videos |
Screenshots and Videos |
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Pricing
No information available.
Free Version
Not Supported
Free Trial
Supported
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Pricing
$0.005 per minute
Free Version
Not Supported
Free Trial
Not Supported
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Reviews/
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Reviews/
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Training
Documentation
Supported
Webinars
Not Supported
Live Online
Not Supported
In Person
Not Supported
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Training
Documentation
Supported
Webinars
Not Supported
Live Online
Supported
In Person
Not Supported
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Company InformationSpaceXSI
Founded: 2023
United States
x.ai/news/grok-stt-and-tts-apis
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Company InformationInworld
Founded: 2021
United States
inworld.ai/tts
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Alternatives |
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Categories |
Categories |
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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
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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
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