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Get 25% off Diverse, Ready-to-use Speech Datasets for AI

Build your AI Model Using High-performance, Bias-reducing Speech & Audio Datasets with Built-in Compliance. Offer valid until May 30, 2025.

200K+

HOURS OF SPEECH

3M+

MUSIC TRACKS & SOUND EFFECTS

120+

MARKETS COVERED

Defined.ai is Trusted by Global AI Leaders

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Reduce Word Error Rate from 18% to just 1.7%.
With real, representative speech data.

Most Popular Speech Datasets

Arabic Scripted Monologue Speech Dataset

Arabic Scripted Monologue

English Spontaneous IVR Speech Dataset

English Spontaneous IVR

Tamil Spontaneous Dialogue Speech Dataset

Tamil Spontaneous Dialogue

Spanish Spontaneous Dialogue Speech Dataset

Spanish Spontaneous Dialogue

Persian Spontaneous Dialogue Speech Dataset

Persian Spontaneous Dialogue

Hindi Spontaneous Dialogue Speech Dataset

Hindi Spontaneous Dialogue

Limited time: 25% off all off-the-shelf speech datasets.
Talk to our team today to explore every dataset on offer.

Diverse Speech Data in 70+ Languages

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Why Defined.ai?

We have the world’s largest data marketplace for AI training, projects and tools. Our ready-to-use speech and voice datasets improve performance, reduce bias and ensure compliance—now 25% off until May 30. 

Performance

High-quality deep learning datasets, with diverse languages and built for real-world AI projects like speech recognition and natural language processing. 

Bias Reduction

Machine learning training data for AI fine tuning curated for inclusion—generated by real people across languages, locales and domains for voice recognition projects. 

Speed 

Instant access to off-the-shelf speech training data via our AI Marketplace and customizable AI training workflows. 

Compliance

Training data for AI ensuring legal standards, privacy, ethical sourcing and fully-documented consent for use. 

Our data marketplace in 3 easy steps

1. Browse the Datasets

Use our advanced, dynamic filters to explore our vast collection by the type of data you’re looking for, your industry or use case and global languages.

2. Request a Free Sample

Validate fit before you commit: request a sample directly from our data marketplace or by contacting us.

3. Start Building

All of our datasets are AI-ready so you can start building and fine-tuning your models immediately.

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“Defined.ai provides access to our premium, commercially-safe visual content to help create high-quality GenAI solutions that respect creators’ rights and deliver exceptional performance.” 

Peter Orlowsky, SVP of Global Strategic Partnerships at Getty Images
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“I want to thank Defined.ai, through their collaboration with RunPod.io, for helping us get our Word Error Rate from 18% down to 1.7%. Off-the-shelf data like theirs is often not within our budget, so it was a game changer for them to make it affordable via their collaboration with RunPod.” 

Rémi Caland, CTO at Theseus AI

Speech Data You Can Build On

Whether you’re training voice assistants, fine-tuning LLMs or scaling conversational AI, the quality of your speech data matters. Defined.ai delivers what your models need—fast, accurate and compliant data.