What AI models power the platform?

We use PersonaPlex 7B for conversational AI, Fish Speech v1.5 for multilingual TTS, Orpheus TTS 3B for emotional speech, Whisper Large v3 for transcription, and OpenVoice v2 for voice conversion.

The Ultimate
Speech to Speech
AI Platform

Clone any voice in seconds. Convert speech in real-time. Build voice applications with state-of-the-art open-source models. Full-duplex conversations that feel natural.

Start Free Try Voice Cloning

No credit card required 10 free credits API access included

Voice Cloning Demo

Same words, different voice

Hear the same sentence in two different voices

Clone Your Own Voice

PersonaPlex 7B Fish Speech v1.5 Orpheus TTS 3B Whisper Large v3 OpenVoice v2

Everything You Need for Voice AI

Comprehensive tools for every speech application

Voice Cloning

Clone any voice from just 10-30 seconds of audio. Zero-shot cloning with natural prosody and emotion preservation.

10-30 second samples
Multilingual support
Emotion preservation

Try Voice Cloning

Text to Speech

Convert text to natural-sounding speech with multiple voices, languages, and emotional styles.

50+ premium voices
29 languages
SSML support

Try Text to Speech

Speech to Text

Accurate transcription powered by Whisper with speaker diarization, timestamps, and automatic punctuation.

99%+ accuracy
Speaker diarization
Word timestamps

Try Speech to Text

Voice Conversion

Transform any voice into another while preserving the original speech content, timing, and emotion.

Any-to-any conversion
Preserve timing
Real-time capable

Try Voice Conversion

Real-Time Voice Chat

Full-duplex conversational AI powered by PersonaPlex. Natural interruptions, backchannels, and <200ms latency.

Full-duplex (listen & speak)
<200ms latency
Custom personas

Try Voice Chat

Custom Voice Training

Train your own voice models with our cloud GPUs. Fine-tune for perfect quality on your specific use case.

Upload your dataset
Fine-tune models
Private voice models

Start Training

How It Works

Three simple steps to voice transformation

Upload Audio

Upload a voice sample (10-30 seconds) or record directly in your browser. We support MP3, WAV, FLAC, and more.

Process with AI

Our GPU cluster processes your audio using state-of-the-art models like PersonaPlex, Fish Speech, and Orpheus.

Download or Stream

Get your results instantly. Download in multiple formats or stream directly via our real-time API.

Powered by the Best Open-Source Models

We use and contribute to cutting-edge speech AI research

PersonaPlex 7B

NVIDIA's full-duplex conversational AI

Full-duplex conversation
Custom personas
<200ms latency

Fish Speech v1.5

State-of-the-art multilingual TTS

Zero-shot cloning
13 languages
Lowest WER

Orpheus TTS 3B

Llama-based emotional speech

Emotion control
~100ms streaming
Human-like prosody

Whisper Large v3

Industry-leading transcription

99%+ accuracy
100+ languages
Speaker diarization

Explore All Models

Built for Every Use Case

From content creation to enterprise applications

Content Creation

Create voiceovers for videos, podcasts, audiobooks, and social media content at scale.

Customer Service

Build voice agents that sound natural and can handle complex conversations.

Localization

Dub content into multiple languages while preserving the original speaker's voice.

Accessibility

Give a voice to those who have lost theirs. Create personalized speech synthesis.

Gaming & Entertainment

Create dynamic NPC voices, character dialogues, and interactive experiences.

Education

Create engaging educational content with natural-sounding narration.

Developer API

Build with Our API

Simple REST API with SDKs for Python, JavaScript, and more. Real-time WebSocket streaming for low-latency applications.

RESTful API
Simple HTTP endpoints for all features
WebSocket Streaming
Real-time audio streaming with <200ms latency
Webhooks
Get notified when processing completes

View API Docs

POST /v1/voice-clone

import speechtospeech

client = speechtospeech.Client(api_key="your-api-key")

# Clone a voice from audio
voice = client.voices.clone(
    name="My Voice",
    files=["sample.mp3"]
)

# Generate speech with cloned voice
audio = client.audio.speech.create(
    model="fish-speech-v1.5",
    voice=voice.id,
    input="Hello, this is my cloned voice!"
)

audio.save("output.mp3")

Simple, Transparent Pricing

Start free, scale as you grow

Free

$0/mo

10 credits/month
All features included
API access
Community support

Get Started

Pro

$29/mo

500 credits/month
Priority processing
Custom voice training
Email support

Start Pro Trial

Enterprise

$99/mo

2000 credits/month
Dedicated GPU access
Unlimited voice models
Priority support

Contact Sales

View full pricing details

Frequently Asked Questions

Everything you need to know about Speech to Speech AI

Voice cloning uses AI to analyze a sample of someone's voice (typically 10-30 seconds) and create a digital model that can speak any text in that voice. Our platform uses state-of-the-art models like Fish Speech and OpenVoice to achieve natural-sounding results with emotion preservation.

We support 29 languages including English, Spanish, French, German, Chinese, Japanese, Korean, Arabic, Portuguese, Russian, Italian, Dutch, Polish, and many more. Our multilingual models can clone voices and generate speech in any of these languages.

Yes! We offer a free tier with 10 credits per month, which includes full access to all features: voice cloning, text-to-speech, speech-to-text, and more. No credit card required to sign up. Upgrade anytime for more credits and priority processing.

We use a combination of state-of-the-art open-source models: PersonaPlex 7B for full-duplex conversational AI, Fish Speech v1.5 for multilingual TTS, Orpheus TTS 3B for emotional speech synthesis, Whisper Large v3 for transcription, and OpenVoice v2 for voice conversion. All running on our high-performance GPU infrastructure.

Absolutely! All our paid plans include commercial usage rights. You can use generated audio for videos, podcasts, apps, games, customer service, and any other commercial application. Just ensure you have rights to clone any voices you use.

Real-time voice chat is our full-duplex conversational AI feature powered by PersonaPlex. It can listen and speak simultaneously, handle natural interruptions, and respond with less than 200ms latency. Perfect for building voice assistants, customer service bots, or interactive characters.

Ready to Transform Your Voice Applications?

Join thousands of developers and creators using Speech to Speech AI.

Start Free Read the Docs

The Ultimate Speech to Speech AI Platform