Gradium
What is Gradium?
Gradium is a voice AI platform for developers that provides ultra-low-latency text-to-speech, speech-to-text, speech-to-speech translation, live translation, voice cloning, and on-device text-to-speech through a unified API. It is designed for building real-time voice agents and conversational applications, with expressive speech generation, accurate transcription, multilingual support, speaker cloning, bidirectional WebSocket streaming, scalable concurrency, and deployment options including cloud, dedicated instances, self-hosted, and on-premises infrastructure.
How to use Gradium?
Create a Gradium account, choose a plan or start with the free tier, and access the Studio or API. Developers can integrate the Python or Rust SDKs, connect through bidirectional WebSocket streaming, and use Gradium with frameworks such as LiveKit, Pipecat, Gradbot, and other voice-agent platforms. Send text for speech generation, audio for transcription, or voice and audio streams for real-time translation and conversational agents.
Gradium's Core Features
Ultra-low-latency streaming text-to-speech with expressive voices
Accurate speech-to-text transcription with code-switching and custom vocabulary
Real-time speech-to-speech and live voice translation
Instant voice cloning from approximately 10 seconds of audio
High-fidelity Pro Voice Clones
Prompt-based voice design
Offline on-device text-to-speech running on CPU
Bidirectional WebSocket real-time API
Timestamp-accurate speech and pronunciation dictionaries
Semantic voice activity detection for conversational turn-taking
Scalable concurrency with stable latency under load
Cloud, dedicated, self-hosted, on-premises, and cloud marketplace deployment
Python and Rust SDKs
Integrations with LiveKit, Pipecat, Gradbot, and major agent frameworks
Telephony audio formats
Enterprise SLAs and zero data retention
Gradium's Use Cases
Build real-time customer service and support voice agents
Create multilingual voice assistants and interpreting applications
Transcribe calls, meetings, interviews, and other audio recordings
Generate expressive voiceovers for media, advertising, and digital content
Create branded or personalized voice experiences with voice cloning
Run synthetic caller evaluations for testing voice agents
Develop offline voice applications for mobile, desktop, and embedded devices
Add low-latency conversational speech to games, apps, and enterprise software
FAQ from Gradium
What services does Gradium provide?
How many credits are included in the free plan?
How are Gradium credits calculated?
How quickly can Gradium return audio?
Does Gradium support voice cloning?
Can Gradium run without an internet connection?
Which deployment options are available?
Does Gradium offer developer SDKs?
What is the least expensive paid Gradium plan?
Are startup credits available?
Gradium Reviews (0)
Gradium Pricing
Free
$0 per month
45,000 included credits, Studio and API access, 2 TTS concurrency, 3 STT concurrency, 2 S2S concurrency, 5 instant voice clones, no Pro Voice Clones, and no commercial use.
XS
$13 per month
225,000 included credits, approximately 5 hours of TTS, 21 hours of STT, 16 hours of STT translation, and 2 to 4 hours of speech-to-speech translation depending on usage. Includes 1,000 instant voice clones and commercial use.
S
$43 per month
900,000 included credits, approximately 20 hours of TTS, 83 hours of STT, 63 hours of STT translation, and 8 to 17 hours of speech-to-speech translation. Includes 1,000 instant voice clones and commercial use.
M
$340 per month
9 million included credits, approximately 200 hours of TTS, 833 hours of STT, 625 hours of STT translation, and 83 to 167 hours of speech-to-speech translation. Includes 1,000 instant voice clones, 5 Pro Voice Clones, and commercial use.
L
$1,615 per month
45 million included credits, approximately 1,000 hours of TTS, 4,167 hours of STT, 3,125 hours of STT translation, and 417 to 833 hours of speech-to-speech translation. Includes 1,000 instant voice clones, 20 Pro Voice Clones, and commercial use.
Enterprise
Custom pricing
Unlimited credits, custom concurrency, unlimited instant and Pro Voice Clones, commercial use, and enterprise-level arrangements.
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