Best real-time text-to-speech in the world.

Simba 3.2 is the #1 model on Artificial Analysis, at the lowest price and sub-100ms latency. Don't take our word for it — hear it against a competing flagship and pick the winner.

Sample
It was the best of times, it was the worst of times, it was the age of wisdom, it was the age of foolishness, it was the epoch of belief, it was the epoch of incredulity.

Two voices read it. You pick the winner.

Voice A
Waiting for your prompt
Voice B
Waiting for your prompt
Featured Model

Simba 3.2

Our flagship streaming-native English model, with the lowest time to first byte in the Simba family, finer-grained emotional control, SSML prosody, and a curated voice set.

simba-3.2 English today 24 kHz
Explore our models

Delivery preview

Five expressions. One line.

Beatrice

“Every moment of light and dark is a miracle.”

Research in product

Voice technology you can hear.

Speech is more than clean audio. Simba models identity, expression, and language as one continuous signal, then serves it fast enough for real conversation.

Create a reusable voice from a short, consented reference clip. Self-serve cloning on Simba 3.0 preserves the speaker's identity across new scripts.

simba-3.0 2 playable samples
Simba 3.0 simba-3.0
01 / 03

Voice identity

Reference in. Same speaker out.

Reference

Original speaker

Clone

Simba 3.0 output

Consent-first cloning with a reusable voice ID

Direct the same line toward neutral, calm, cheerful, energetic, or sad delivery. Simba 3.2 shapes rhythm and tone with SSML emotion control.

simba-3.2 5 playable samples
Simba 3.2 simba-3.2
02 / 03

Expression

Same words. Different feeling.

Use Simba 3.0 for English, German, Mexican Spanish, French, Italian, and Brazilian Portuguese. Each sample uses a voice cataloged for that locale.

simba-3.0 6 playable samples
Simba 3.0 simba-3.0
03 / 03

Six validated locales

Streaming speech beyond English.

Build with our models

A single API to access all SpeechifyAI models. Streaming, voice cloning, emotion control — everything in a few lines of code.

Explore the API Documentation
bash 
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"
  }'

SpeechifyAI 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.

Learn about our lab