We build voice AI that understands how humans speak.
Speechify AI is a research lab advancing the science of speech synthesis, voice cloning, and emotional expression in generated audio.
Simba 3.0
Our flagship streaming-native model. Lower time-to-first-byte than previous generations, with finer-grained emotional control, zero-shot voice cloning, and SSML prosody. Currently English only; multilingual support is in development.
“Every moment of light and dark is a miracle.”
Technology
Zero-Shot Voice Cloning
Clone any voice from a short reference clip. Simba captures speaker identity — timbre, cadence, and micro-expressions — from as little as 10 seconds of audio.
Emotion Control
Generate the same text with different emotional expressions. Simba models emotion at the prosody level — not just speed and pitch, but the subtle rhythmic and tonal patterns that convey feeling.
Multilingual Synthesis
Native-quality speech across 50+ locales. Each language uses voices recorded in that locale for natural pronunciation and prosody, with mixed-language input handled automatically.
Build with our models
A single API to access all Speechify models. Streaming, voice cloning, emotion control — everything in a few lines of code.
curl -X POST https://api.speechify.ai/v1/audio/speech \
-H "Authorization: Bearer $SPEECHIFY_API_KEY" \
-H "Content-Type: application/json" \
-d '{
"input": "Hello, world.",
"voice_id": "george",
"audio_format": "mp3"
}'Speechify AI is building the future of voice
We're a research lab focused on speech synthesis, voice understanding, and audio intelligence. Our work spans fundamental research in neural speech generation, zero-shot voice cloning, and emotional expression modeling — turning the nuances of human speech into something machines can learn and reproduce.