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Gradium
FreemiumGradium is an AI-powered voice platform for developers building real-time TTS, STT, and cloning.
Struggling to build real-time voice agents because latency, multilingual support, and complex integrations slow your progress?
Gradium is a unified voice AI platform for developers that delivers ultra-low-latency text-to-speech, accurate speech-to-text (with code-switching and custom vocabulary), real-time speech-to-speech translation, and instant voice cloning—all through a single API. With on-device TTS options, bidirectional WebSocket streaming, and scalable deployment (cloud, dedicated, self-hosted, or on-prem), you can move from prototypes to production fast.
Stop Wasting Time on Voice Agent Latency
Experience low-latency streaming and high-quality voices that keep conversations natural, even under load, so users get instant responses.
Unified Translation, Transcription & Cloning
Translate and transcribe in real time, switch languages on the fly, and clone expressive voices from short samples—without hopping between tools.
Go to Production with Flexible Deployments
Use Gradium in the cloud, on dedicated hardware, or offline on devices; connect via Python or Rust SDKs and major agent frameworks like LiveKit, Pipecat, and Gradbot to ship voice-enabled apps fast.
Quick verdict
Based on 2 reviews
Pros
- Ultra-low-latency streaming lets me generate live NPC dialogue with almost no perceptible lag.
- Accurate STT with code-switching keeps multilingual player chats reliably transcribed.
- On-device TTS enables offline demos and reduces data usage for mobile builds.
Cons
- Pebble: reconnections can hiccup on flaky networks, so I added a lightweight fallback.
- Setup required extra boilerplate to weave Gradium into my custom engine.
- Voice quality varies slightly under CPU stress on low-end devices.
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Gradium is an AI-powered voice platform for developers building real-time TTS, STT, and cloning.
Customer Reviews for Gradium
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6-month timeline
Most helpful
I launched a pilot to replace our legacy TTS/STT in the support center. The standout is the Bidirectional WebSocket API, which feeds streaming audio straight into our agent UI with minimal latency. Translation and code-switching keep conversations natural across languages. Transcripts are solid, and on-device synthesis helps when agents go offline, though a few industry terms trip the model sometimes.
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Showing 1 - 2 of 2 reviews .
William Anderson
Trusted ReviewerReal-time streaming API powers responsive multilingual support agents
What I liked
What could be better
I launched a pilot to replace our legacy TTS/STT in the support center. The standout is the Bidirectional WebSocket API, which feeds streaming audio straight into our agent UI with minimal latency. Translation and code-switching keep conversations natural across languages. Transcripts are solid, and on-device synthesis helps when agents go offline, though a few industry terms trip the model sometimes.
Sophia Williams
Trusted Reviewer Verified purchaseUltra-low-latency voices for real-time in-game NPC banter
What I liked
What could be better
I'm building a mobile game with live NPC dialogue, and Gradium's ultra-low-latency streaming lets me push voice in sync with on-screen actions. The STT handles code-switching chats, and the on-device TTS keeps things playable offline during demos. The Bidirectional WebSocket API flows cleanly into my game loop, and setup became surprisingly straightforward after I wrapped the audio callbacks. When I hear responsive NPCs, I know I made the right choice.
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Availability
Is Gradium up or down? Weekly reachability checks of its website.
Uptime
100%
Currently reachable
Over the last 1 weekly checks
How it works
How Gradium Works In 3 Steps?
1. Create Gradium Account
Sign up to access Studio and API for real-time TTS, STT, and cloning.
2. Choose a Plan
Select freemium or paid tiers to fit your voice agent workload.
3. Connect SDKs
Integrate Python or Rust SDKs and start streaming via WebSocket.
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