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Spotlight post

Gradium Extends Funding to $100 Million and Expands to Silicon Valley

Gradium extends its seed funding to $100 million, welcoming new investors including NVIDIA, and opens a San Francisco Bay Area office to scale its real-time voice AI.

July 8, 20263 min read
Gradium Extends Funding to $100 Million and Expands to Silicon Valley

Models

Text-to-SpeechTurn text into natural sounding voiceSpeech-to-TextTranscribe audio into text instantlyLive TranslationConvert voice to voice in real timeVoice CloningInstance or pro voice cloneOn-Device TTSOffline real-time natural voice

Showcase

Agent DemoTest our voice agent liveGradbotBuild voice agents in a single promptApp GalleryApps built on Gradium

Latest post

Smaller, clearer, better: Phonon Multilingual beats Magpie and NeuTTS Nano in French, German, and Spanish

Phonon, our 100M-parameter on-device Text-To-Speech model, produces up to 3.5x fewer word errors than NVIDIA's Magpie TTS in French, German, and Spanish at 3.6x fewer parameters, and leads NeuTTS Nano on both word error rate and speaker similarity. It clones a reference voice across five languages: English, French, German, Spanish, and Portuguese.

July 15, 20265 min read
Smaller, clearer, better: Phonon Multilingual beats Magpie and NeuTTS Nano in French, German, and Spanish

Build

DocsStart building in minutesStatusMonitor system performanceTrustSecurity and compliance

Company

AboutMeet the team behind GradiumCareersCome build with usPressMedia and news resources
PricingBlog
Sign in

Spotlight post

Gradium Extends Funding to $100 Million and Expands to Silicon Valley

Gradium extends its seed funding to $100 million, welcoming new investors including NVIDIA, and opens a San Francisco Bay Area office to scale its real-time voice AI.

July 8, 20263 min read
Gradium Extends Funding to $100 Million and Expands to Silicon Valley

Models

Text-to-SpeechTurn text into natural sounding voiceSpeech-to-TextTranscribe audio into text instantlyLive TranslationConvert voice to voice in real timeVoice CloningInstance or pro voice cloneOn-Device TTSOffline real-time natural voice

Showcase

Agent DemoTest our voice agent liveGradbotBuild voice agents in a single promptApp GalleryApps built on Gradium

Latest post

Smaller, clearer, better: Phonon Multilingual beats Magpie and NeuTTS Nano in French, German, and Spanish

Phonon, our 100M-parameter on-device Text-To-Speech model, produces up to 3.5x fewer word errors than NVIDIA's Magpie TTS in French, German, and Spanish at 3.6x fewer parameters, and leads NeuTTS Nano on both word error rate and speaker similarity. It clones a reference voice across five languages: English, French, German, Spanish, and Portuguese.

July 15, 20265 min read
Smaller, clearer, better: Phonon Multilingual beats Magpie and NeuTTS Nano in French, German, and Spanish

Build

DocsStart building in minutesStatusMonitor system performanceTrustSecurity and compliance

Company

AboutMeet the team behind GradiumCareersCome build with usPressMedia and news resources

Models

Text-to-SpeechSpeech-to-TextSpeech-to-SpeechLive translationOn-DeviceVoice Cloning

Showcase

Agent DemoGradbotApp Gallery

Build

PricingDocsStatusTrust

Company

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Predictable and Scalable Pricing

Monthly
Yearly
Limited Launch Offer: Speech-To-Speech Translation is 50% off for a limited time. Try it now →

Free

$0/mo

XS

$13/mo

S

$43/mo

M

$340/mo

L

$1,615/mo

Enterprise

Custom
Included Credits45k225k900k9M45MUnlimited
Hours ofiHow credits convert to usage
  • Text-to-Speech: 1 credit / character (~45k chars ≈ 1 hour)
  • Speech-to-Text: 3 credits / second
  • Speech-to-Text Translation: 4 credits / second
  • Speech-to-Speech Translation: 30 credits / second
TTSiText-to-Speech
1 credit per character, 1 hour of audio corresponds to roughly 45,000 characters.		~1hr~5hrs~20hrs~200hrs~1000hrsUnlimited
STTiSpeech-to-Text
3 credits per second, 1 hour of audio corresponds to 10,800 credits.		4hrs21hrs83hrs833hrs4167hrsUnlimited
STT TranslationiSpeech-to-Text Translation
4 credits per second, 1 hour of audio corresponds to 14,400 credits.		3hrs16hrs63hrs625hrs3125hrsUnlimited
S2S TranslationiSpeech-to-Speech Translation
30 credits per second, 1 hour of audio corresponds to about 100,000 credits.		<1hr ~1hr2hrs 4hrs8hrs 17hrs83hrs 167hrs417hrs 833hrsUnlimited
Concurrency
TTS2551015Custom
STT320204060Custom
S2S2551015Custom
Plan Details
Studio access
Yes
Yes
Yes
Yes
Yes
Yes
API access
Yes
Yes
Yes
Yes
Yes
Yes
Commercial useNo
Yes
Yes
Yes
Yes
Yes
Instant voice clone51000100010001000Unlimited
Pro voice clone000520Unlimited
Add. 100k creditsNo$6.9$5.0$4.0$3.8Custom
Limited Launch Offer: Speech-To-Speech Translation is 50% off for a limited time. Try it now →

Free

$0/mo
Included Credits45k
Hours ofiHow credits convert to usage
  • Text-to-Speech: 1 credit / character (~45k chars ≈ 1 hour)
  • Speech-to-Text: 3 credits / second
  • Speech-to-Text Translation: 4 credits / second
  • Speech-to-Speech Translation: 30 credits / second
TTSiText-to-Speech
1 credit per character, 1 hour of audio corresponds to roughly 45,000 characters.		~1hr
STTiSpeech-to-Text
3 credits per second, 1 hour of audio corresponds to 10,800 credits.		4hrs
STT TranslationiSpeech-to-Text Translation
4 credits per second, 1 hour of audio corresponds to 14,400 credits.		3hrs
S2S TranslationiSpeech-to-Speech Translation
30 credits per second, 1 hour of audio corresponds to about 100,000 credits.		<1hr ~1hr

XS

$13/mo
Included Credits225k
Hours ofiHow credits convert to usage
  • Text-to-Speech: 1 credit / character (~45k chars ≈ 1 hour)
  • Speech-to-Text: 3 credits / second
  • Speech-to-Text Translation: 4 credits / second
  • Speech-to-Speech Translation: 30 credits / second
TTSiText-to-Speech
1 credit per character, 1 hour of audio corresponds to roughly 45,000 characters.		~5hrs
STTiSpeech-to-Text
3 credits per second, 1 hour of audio corresponds to 10,800 credits.		21hrs
STT TranslationiSpeech-to-Text Translation
4 credits per second, 1 hour of audio corresponds to 14,400 credits.		16hrs
S2S TranslationiSpeech-to-Speech Translation
30 credits per second, 1 hour of audio corresponds to about 100,000 credits.		2hrs 4hrs

S

$43/mo
Included Credits900k
Hours ofiHow credits convert to usage
  • Text-to-Speech: 1 credit / character (~45k chars ≈ 1 hour)
  • Speech-to-Text: 3 credits / second
  • Speech-to-Text Translation: 4 credits / second
  • Speech-to-Speech Translation: 30 credits / second
TTSiText-to-Speech
1 credit per character, 1 hour of audio corresponds to roughly 45,000 characters.		~20hrs
STTiSpeech-to-Text
3 credits per second, 1 hour of audio corresponds to 10,800 credits.		83hrs
STT TranslationiSpeech-to-Text Translation
4 credits per second, 1 hour of audio corresponds to 14,400 credits.		63hrs
S2S TranslationiSpeech-to-Speech Translation
30 credits per second, 1 hour of audio corresponds to about 100,000 credits.		8hrs 17hrs

M

$340/mo
Included Credits9M
Hours ofiHow credits convert to usage
  • Text-to-Speech: 1 credit / character (~45k chars ≈ 1 hour)
  • Speech-to-Text: 3 credits / second
  • Speech-to-Text Translation: 4 credits / second
  • Speech-to-Speech Translation: 30 credits / second
TTSiText-to-Speech
1 credit per character, 1 hour of audio corresponds to roughly 45,000 characters.		~200hrs
STTiSpeech-to-Text
3 credits per second, 1 hour of audio corresponds to 10,800 credits.		833hrs
STT TranslationiSpeech-to-Text Translation
4 credits per second, 1 hour of audio corresponds to 14,400 credits.		625hrs
S2S TranslationiSpeech-to-Speech Translation
30 credits per second, 1 hour of audio corresponds to about 100,000 credits.		83hrs 167hrs

L

$1,615/mo
Included Credits45M
Hours ofiHow credits convert to usage
  • Text-to-Speech: 1 credit / character (~45k chars ≈ 1 hour)
  • Speech-to-Text: 3 credits / second
  • Speech-to-Text Translation: 4 credits / second
  • Speech-to-Speech Translation: 30 credits / second
TTSiText-to-Speech
1 credit per character, 1 hour of audio corresponds to roughly 45,000 characters.		~1000hrs
STTiSpeech-to-Text
3 credits per second, 1 hour of audio corresponds to 10,800 credits.		4167hrs
STT TranslationiSpeech-to-Text Translation
4 credits per second, 1 hour of audio corresponds to 14,400 credits.		3125hrs
S2S TranslationiSpeech-to-Speech Translation
30 credits per second, 1 hour of audio corresponds to about 100,000 credits.		417hrs 833hrs

Enterprise

Custom
Included CreditsUnlimited
Hours ofiHow credits convert to usage
  • Text-to-Speech: 1 credit / character (~45k chars ≈ 1 hour)
  • Speech-to-Text: 3 credits / second
  • Speech-to-Text Translation: 4 credits / second
  • Speech-to-Speech Translation: 30 credits / second
TTSiText-to-Speech
1 credit per character, 1 hour of audio corresponds to roughly 45,000 characters.		Unlimited
STTiSpeech-to-Text
3 credits per second, 1 hour of audio corresponds to 10,800 credits.		Unlimited
STT TranslationiSpeech-to-Text Translation
4 credits per second, 1 hour of audio corresponds to 14,400 credits.		Unlimited
S2S TranslationiSpeech-to-Speech Translation
30 credits per second, 1 hour of audio corresponds to about 100,000 credits.		Unlimited

Start Up Grants Available

Ship the next generation of voice AI products with Gradium's API.

Get $2,000+ in free credits, 6 months of full API access, direct Engineering Support, and Early Access to Our Newest Models and Research Previews.

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