Gradium

@GradiumAI

The voice layer for modern apps and agents. Real-time, scalable voice APIs: TTS, STT, turn-taking & voice cloning. Devs: build → gradium.ai/#models

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Gradium
@GradiumAI
Dec 2, 2025
Gradium is out of stealth to solve voice. We raised $70M and after only 3 months we’re releasing our transcription and synthesis products to power the next generation of voice AI.
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Gradium
@GradiumAI
8h
Today, we’re launching Voice Design. Write a prompt, create a voice. Describe the accent, age, gender, and pace your use case needs, and get new voices in seconds, ready to use. Live and free in the Gradium API and Studio. gradium.link/voice-design
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Gradium
@GradiumAI
Sep 7
Voice Arena benchmarked 10 TTS models on latency. Gradium lands #1: lowest p50 at 231 ms, and the tightest spread across p25, p50 and p75. This is one of the first things developers measure when they test us. Thanks @voicearena_ai for running this in public on
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Gradium
@GradiumAI
Sep 4
Most benchmarks are English first. Our developers build everywhere, so our Text-to-Speech holds the same accuracy on hard customer support sentences in every language we tested. Read more: gradium.ai/blog/gradium-t…
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Gradium
@GradiumAI
Sep 3
99.97% uptime over the past 3 months across Gradium's real-time speech-to-text and text-to-speech APIs. Voice agents increasingly handle real inbound calls in healthcare and other critical industries. The infrastructure has to be there when the call comes in. We publish our
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