Home / What Is TTS

What Is Text-to-Speech (TTS)?

Text-to-Speech (TTS) converts written text into spoken audio using AI models. Modern neural TTS produces natural voices for content creation, apps, accessibility, and more.

How It Works

Text is normalized and split into phonetic units.
A neural model predicts timing, prosody, and intonation.
A vocoder renders high-quality waveform audio.

Common TTS Use Cases

Content Creation

Voiceovers for videos, podcasts, audiobooks, and social content.

Product & UX

In-app narration, conversational agents, alerts, and accessibility.

Localization

Multilingual dubbing and market-specific voice adaptation.

Support & Training

Call flows, IVR, onboarding, and e-learning narration at scale.

AI TTS Models

20+ models

All models are available through our unified API. No separate API keys or infrastructure needed.

Major Provider APIs

Premium commercial providers also available through our platform. One API key for all of them.

Amazon Polly Generative

AWS's latest generative TTS with the most expressive and human-like voices.

Amazon Web Services

Amazon Polly Long-Form

AWS TTS engine optimized for long-form content like audiobooks and articles.

Amazon Web Services

Amazon Polly Neural

AWS neural TTS with natural-sounding voices for production applications.

Amazon Web Services

Amazon Polly Standard

AWS's affordable standard TTS with 60+ voices and seamless AWS integration.

Amazon Web Services

Cartesia Sonic

Ultra-fast streaming TTS with 90ms latency and support for 42 languages.

Cartesia

Deepgram Aura-2

Ultra-low latency TTS with 90ms time-to-first-byte, built for conversational AI.

Deepgram

ElevenLabs Flash v2.5

Low-latency ElevenLabs model optimized for real-time conversational AI applications.

ElevenLabs

ElevenLabs Multilingual v2

Industry-leading multilingual TTS with the most natural and expressive AI voices available.

ElevenLabs

ElevenLabs Turbo v2.5

Fastest ElevenLabs model with ultra-low latency for time-critical voice applications.

ElevenLabs

Google Cloud Neural2

Google's next-gen neural voices with improved naturalness and custom voice support.

Google

Google Cloud Standard

Google's most affordable TTS with 380+ voices across 50+ languages and SSML support.

Google

Google Cloud Studio

Google's highest-quality studio-grade voices for premium content and broadcasting.

Google

Google Cloud WaveNet

Google DeepMind WaveNet voices with natural intonation and expressive speech quality.

Google

Microsoft Azure Neural

Microsoft's neural TTS with 500+ voices, 140+ languages, and emotion styles.

Microsoft

Microsoft Azure Neural HD

Azure's highest-quality neural voices with enhanced expressiveness and studio quality.

Microsoft

OpenAI GPT-4o Mini TTS

OpenAI's instruction-following TTS — control tone, emotion, and speaking style via prompts.

OpenAI

OpenAI TTS

OpenAI's fast text-to-speech model with 13 natural voices and 57 language support.

OpenAI

OpenAI TTS HD

OpenAI's high-definition TTS model for premium audio quality and studio-grade output.

OpenAI

PlayHT Play3.0-mini

Fast, multilingual TTS with 36 language support and instant voice cloning.

PlayHT

PlayHT PlayDialog

Ultra-realistic conversational AI voices with natural turn-taking and emotion.

PlayHT

Try Any Model Now

WhatIsTTS lets you test and compare all 20+ models through one platform. Free tier available.

Try Text to Speech See Pricing