Diatts

Diatts

Dia TTS is an open-source, Apache-2.0 text-to-speech model designed for realistic multi-speaker dialogues with voice cloning, emotional control, and non-verbal sound generation.

Diatts is voice & speech software teams evaluate for content & marketing. Use this page to review pricing, integration signals, and the best alternatives before you commit.

Freemium API Enterprise 80/100
#58 in Voice & Speech (58 tools)
Added 4 months ago
Data reviewed Jul 16, 2026

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Quick Overview

Best for: Content & Marketing

What it does

Voice & Speech software for decision-makers comparing workflow fit and alternatives.

Best fit

Content & Marketing

Pricing snapshot

Freemium from Free

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Diatts

Dia TTS is an open-source text-to-speech model (Apache 2.0) focused on producing natural multi-speaker dialogues. It supports voice cloning from short audio samples, fine-grained emotion and tone control, and the generation of non-verbal sounds such as laughter and coughs. The model is presented as usable via a web demo and downloadable/open weights, and is optimized for real-time performance on consumer-grade GPUs, targeting content creators, developers, educators, and enterprise integrations.

Dia TTS is an open-source, Apache-2.0 text-to-speech model designed for realistic multi-speaker dialogues with voice cloning, emotional control, and non-verbal sound generation.

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Key Features

Realistic Dialogue Generation

Generates lifelike multi-speaker conversations with natural timing, pauses, interruptions, and variations in speaking speed.

Non-Verbal Sound Support

Can produce non-verbal sounds (e.g., laughter, coughing, throat clearing) directly from text cues, removing the need for separate sound effects.

Voice Cloning

Mimics any voice using a short audio sample to produce personalized output and consistent voices across projects.

Emotion and Tone Control

Allows adjustments to speech emotion and tone for expressive, context-appropriate output; supports SSML tags and emotion parameters.

Open Source (Apache 2.0)

Weights and code are openly available under the Apache 2.0 license for free use, modification, and research.

Large Model & Transformer Architecture

Uses a 1.6 billion parameter transformer-based model to capture intonation, rhythm, and long-context coherence.

Audio Conditioning

Supports reference audio conditioning to guide voice style and emotion for more precise outputs.

Real-Time Optimizations

Optimized for fast generation on consumer-grade GPUs to enable near real-time use cases.

Pricing

Free Tier Available

Free tier available for testing and development; free tier limit of up to 1000 characters per request.

Free

Free
  • Free tier for testing and development
  • Character limit: up to 1000 characters per request (free tier)

Paid (Usage-based)

Usage-based paid plans (no specific prices listed)
  • Higher per-request character limits than free tier
  • Scalable usage-based billing

Enterprise

Custom pricing
  • Customizable enterprise plans and higher limits
  • Priority support and custom integration assistance for enterprise customers

Use Cases

Content Creation

Generate dialogue for podcasts, audiobooks, and videos with multiple speakers and embedded non-verbal sounds.

Language Learning

Create realistic conversations for listening and speaking practice with controllable tone and emotion.

Customer Support

Power virtual assistants with more human-like interactions to improve automated support experiences.

Game Development

Produce lifelike character voices and interactions useful for indie developers and rapid prototyping.

Advertising & Marketing

Generate emotionally controlled voiceovers for ads and marketing materials to support fast iteration and A/B testing.

Integrations

REST API

Provides a robust REST API for developers to integrate Dia TTS into applications (site states API is available and well-documented).

Open Weights & GitHub

Code and model weights are available publicly (open-source) for integration, research, and customization via GitHub.

Benefits

Produces natural, multi-speaker dialogues that capture conversational nuances.
Includes non-verbal sounds and emotion control to increase realism and reduce post-production effort.
Open-source licensing (Apache 2.0) enables free use, customization, and research.
Optimized for real-time use on consumer-grade hardware, making it broadly accessible.

Limitations

Claim this listing to add transparent limitations.

Frequently Asked Questions

What is DIA-TTS?
DIA-TTS is an open-source text-to-speech solution using advanced AI to convert text into natural-sounding, expressive speech.
How accurate is the voice cloning feature?
The site states voice cloning achieves remarkable accuracy using state-of-the-art deep learning models; a few minutes of samples can create an authentic digital voice.
What languages are supported?
DIA-TTS supports multiple languages including English, Spanish, French, German, Italian, Portuguese, Chinese (Mandarin), Japanese, and Korean.
Is there an API available?
Yes. The site states a robust REST API is available, described as well-documented and suitable for integration into applications.
What are the pricing options?
The site offers a free tier for testing and development, scalable paid options based on usage volume, and customizable enterprise plans.
How can I control emotions in the generated speech?
DIA-TTS provides fine-grained control through SSML tags and emotion parameters to adjust pitch, speed, and emotional tone.
What file formats are supported?
Supported output formats include MP3, WAV, OGG, and FLAC.
Is there a character limit per conversion?
Yes. The character limit varies by plan: the free tier allows up to 1000 characters per request; paid plans offer higher limits.
What kind of support do you offer?
Support includes documentation, API references, code examples, dedicated customer service, and priority support for enterprise customers.
How secure is the service?
The site states it uses enterprise-grade encryption for data transmissions, regular security audits, and compliance with industry standards; data is processed in secure environments and not shared with third parties.

Getting Started

  1. 1 Step 1: Input your script into the interface, using speaker tags like [S1], [S2] and non-verbal cues such as (laughs).
  2. 2 Step 2: (Optional) Upload a reference audio file to guide voice style or enable voice cloning.
  3. 3 Step 3: Click 'Generate' to produce speech from the provided text and parameters.
  4. 4 Step 4: Preview the generated audio in the interface and download the file if satisfied.

Support

docs

Detailed documentation, API references, and code examples are provided (site states documentation is available).

email

Contact via listed email address: [email protected]

customer service

Dedicated customer service and priority enterprise support are offered for paid/enterprise customers.

API

Available: Yes
Documentation:

Robust REST API that is well-documented and supports various programming languages and frameworks (no direct documentation URL provided on the supplied page).

Rate Limits:

Rate limits vary by plan; free tier limit is up to 1000 characters per request.

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