Become a partnerGet in touch

Your trusted
training data partner

High-quality, ethical data and expert services to accelerate your AI journey.

Browse AI Marketplace

Trusted by Leading AI Innovators

End-to-end AI training data marketplace

We empower AI builders with high-quality, ethically sourced training data backed by expert services that help you collect, annotate, and evaluate data to customize, scale, and succeed.

Ethical AI by design

Ethical AI by design

We follow the highest standards for data collection and handling—ISO 27001 & 27701 accredited, GDPR & HIPAA compliant, and committed to fair working conditions.

World’s largest AI Data Marketplace

World’s largest AI Data Marketplace

Access off-the-shelf ethically sourced and high-quality datasets across audio, image, video, text, and multimodal formats—delivered via API for speed and scale.

End-to-End AI services

End-to-End AI services

From custom data collection and annotation to evaluation, we support your entire AI lifecycle, helping you move from development to deployment seamlessly.

Global reach, local expertise

Global reach, local expertise

Tap into a 1.6M+ strong crowd spanning 150+ countries and 500+ languages, dialects, and locales—perfect for market expansion and diverse AI applications.

Built for scale and speed

Built for scale and speed

Accelerate your AI initiatives with flexible solutions designed for enterprise-grade performance and rapid delivery.

Trust and security at every step

Trust and security at every step

Every dataset is vetted for privacy and security, ensuring compliance and confidence for even the most regulated industries.

Biometric Video Dataset

Biometric
Biometric

English Doctor-Patient Conversations

EN
Healthcare
Healthcare

Medical Imaging - Surgical Images

EN
Healthcare
Healthcare

English Question-Answer pairs

EN
Healthcare
Healthcare

Biometric Video Dataset

Biometric
Biometric

English Doctor-Patient Conversations

EN
Healthcare
Healthcare

Medical Imaging - Surgical Images

EN
Healthcare
Healthcare

English Question-Answer pairs

EN
Healthcare
Healthcare

Hindi Podcasts

hi-US, hi-IN
Various
General
Various
General

Arabic Call Center

AR
Call Center
Call Center

UK English Call Center

EN, en-GB
Call Center
Call Center

English STEM articles

EN
Academic
Academic

Hindi Podcasts

hi-US, hi-IN
Various
General
Various
General

Arabic Call Center

AR
Call Center
Call Center

UK English Call Center

EN, en-GB
Call Center
Call Center

English STEM articles

EN
Academic
Academic

Explore our off-the-shelf AI datasets

The largest selection of ready-to-use AI training datasets across speech, text, image, video, and multimodal, across all niches, domains and locales. Fully customizable to your project needs.

Browse all datasets

Biometric Video Dataset

Biometric
Biometric

English Doctor-Patient Conversations

EN
Healthcare
Healthcare

Medical Imaging - Surgical Images

EN
Healthcare
Healthcare

English Question-Answer pairs

EN
Healthcare
Healthcare

Hindi Podcasts

hi-US, hi-IN
Various
General
Various
General

Arabic Call Center

AR
Call Center
Call Center

UK English Call Center

EN, en-GB
Call Center
Call Center

English STEM articles

EN
Academic
Academic

Biometric Video Dataset

Biometric
Biometric

English Doctor-Patient Conversations

EN
Healthcare
Healthcare

Medical Imaging - Surgical Images

EN
Healthcare
Healthcare

English Question-Answer pairs

EN
Healthcare
Healthcare

Hindi Podcasts

hi-US, hi-IN
Various
General
Various
General

Arabic Call Center

AR
Call Center
Call Center

UK English Call Center

EN, en-GB
Call Center
Call Center

English STEM articles

EN
Academic
Academic

Explore AI datasets across key domains

Automotive
Images
Books
Music
Insurance
Content Moderation
Healthcare
Finance

How it works

Browse our Data Marketplace with advanced filters for specific technical requirements, customize AI training datasets to fit your project needs, and request free samples and quotes to start training faster.

Read our Ethical AI Manifesto

How it works

Browse our Data Marketplace with advanced filters for specific technical requirements, customize AI training datasets to fit your project needs, and request free samples and quotes to start training faster.

1

Browse

Quickly find the right AI dataset with advanced filters that match your technical requirements.

2

Customize

Tailor AI datasets to your project needs with flexible options from content type, file format, sample rate, bit depth, and more.

3

Select

Access free AI dataset samples and request quotes to make confident, informed decisions.

4

Train

Safe and secure delivery via file transfer or API so you can begin training your models quickly.

Get started
Read our Ethical AI Manifesto

Solutions powered by compliant AI training data

Discover how global organizations achieve faster deployment and better results with our AI datasets. See more use cases

Trustworthy and reliable approach to enhancing ASR models to improve medical dictation
Trustworthy and reliable approach to enhancing ASR models to improve medical dictation
Healthcare

Trustworthy and reliable approach to enhancing ASR models to improve medical dictation

Trustworthy and reliable approach to enhancing ASR models to improve medical dictation
Trustworthy and reliable approach to enhancing ASR models to improve medical dictation
Healthcare

Trustworthy and reliable approach to enhancing ASR models to improve medical dictation

Secure and compliant data annotation for fraud detection and risk management
Secure and compliant data annotation for fraud detection and risk management
Finance

Secure and compliant data annotation for fraud detection and risk management

High quality data solutions for safety-critical mobility applications
High quality data solutions for safety-critical mobility applications
Automotive

High quality data solutions for safety-critical mobility applications

Safeguarding social and gaming spaces
Safeguarding social and gaming spaces
Content Moderation

Safeguarding social and gaming spaces

Proven trust. Real impact.

Real feedback from AI teams and enterprises using Defined.ai to power accurate, reliable, and scalable models. View our case studies

“We needed a highly specialized robotics dataset that no one else could provide. Defined.ai delivered 225 hours of annotated human demonstration data, complete with clips ranging from 30 seconds to 30 minutes under diverse conditions. Their ability to source multi-sensor hardware kits gave us flexibility and confidence throughout the project.”

Technical Program Manager, Robotics

Leading Artificial Intelligence Organization

Questions? We’ve got you covered.

Find quick answers to the most common questions about our datasets, licensing and data solutions. Explore the full FAQ

Defined.ai is an AI data marketplace that enables enterprises to buy or commission high-quality training data for artificial intelligence, including speech data, text data, image data, and multimodal datasets, with a strong focus on multilingual and domain-specific AI data.

Yes. In addition to ready-to-use datasets, Defined.ai provides custom data collection, data labeling and annotation, and LLM fine-tuning services, allowing organizations to adapt models to specific use cases, industries, and compliance requirements.

Defined.ai supports technology, healthcare, finance, automotive, and other regulated industries that require reliable, high-quality AI training data for mission-critical applications.

Defined.ai offers curated datasets for speech recognition (ASR), natural language processing (NLP), sentiment analysis, computer vision, and large language models (LLMs), covering multiple languages, accents, and regulated domains.

Defined.ai is built around ethical AI data, ensuring privacy-first data sourcing, security, regulatory compliance, and bias reduction, helping enterprises train AI models responsibly and at scale.

Find the right dataset for your needs.

Browse AI Marketplace

© 2026 DefinedCrowd. All rights reserved.

Award logo
Award logo
Award logo
Award logo
Award logo
Award logo

Datasets

Marketplace

Solutions

Privacy and Cookie PolicyTerms & Conditions (T&M)Data License AgreementSupplier Program
Privacy and Cookie PolicyTerms & Conditions (T&M)Data License AgreementSupplier ProgramCCPA Privacy StatementWhistleblowing ChannelCandidate Privacy Statement

© 2026 DefinedCrowd. All rights reserved.

Award logo
Award logo
Award logo
Award logo
Award logo
Award logo