About Defined.ai
The leading Marketplace for Ethical AI Data
Defined.ai is a global technology company focused on enabling responsible AI through ethical data sourcing. As the leading marketplace for ethical AI training data, we help AI teams build, scale, and deploy high-quality models with confidence.
What We Stand For
Our values guide how we build, collaborate, and deliver responsible AI solutions.
Expertise
We’re experts in our field. We’ll find the best solution for your needs through a frictionless experience.
Reliability
We deliver what we promise. Quality is at the center of everything we do.
Ethical AI
We build AI responsibly, ensuring transparent data sourcing, fair practices, and respect for people’s rights.
Trust
We’re your trusted AI data partner. Our security and privacy policies not only protect your data, but also your company’s reputation.
Innovation
We’re building the world of tomorrow. Our innovative products and technologies empower you to make your AI smarter.
The Minds and Milestones Shaping Ethical AI
Discover the key milestones and achievements that reflect our commitment to responsible AI.
Defined.ai was founded in 2015
CEO Daniela Braga founded the company in Seattle, WA and opened an R&D center in Lisbon, Portugal.
Series A & Global Expansion
We closed an US$11.8 million Series A funding led by Evolution Equity Partners, opened an office in Tokyo, announced an Amazon Alexa Skills partnership, a product integration with IBM Watson Studio, and were designated as a featured vendor for Microsoft‘s co-sell program.
Platform Launch & Seed Funding
We launched our smart data platform and received a seed round of US$1.1 million from investors that included Sony, Amazon Alexa Fund, Portugal Ventures and Busy Angels.
Defined.ai Marketplace Launch
Launched Defined.ai, the world’s leading online marketplace, where AI professionals are able to commission, buy, or sell AI training data, tools, or models.
10 Years of Impact
Celebrating a decade of building responsible and ethical AI, scaling globally, and advancing our mission to make high-quality data accessible worldwide.
Defined.ai was founded in 2015
CEO Daniela Braga founded the company in Seattle, WA and opened an R&D center in Lisbon, Portugal.
Platform Launch & Seed Funding
We launched our smart data platform and received a seed round of US$1.1 million from investors that included Sony, Amazon Alexa Fund, Portugal Ventures and Busy Angels.
10 Years of Impact
Celebrating a decade of building responsible and ethical AI, scaling globally, and advancing our mission to make high-quality data accessible worldwide.
Series A & Global Expansion
We closed an US$11.8 million Series A funding led by Evolution Equity Partners, opened an office in Tokyo, announced an Amazon Alexa Skills partnership, a product integration with IBM Watson Studio, and were designated as a featured vendor for Microsoft‘s co-sell program.
Defined.ai Marketplace Launch
Launched Defined.ai, the world’s leading online marketplace, where AI professionals are able to commission, buy, or sell AI training data, tools, or models.
More special moments
Industry Recognition & Rapid Scale
Named one of CB Insights’ 100 most promising AI startups, we grew our team to 100+ employees, achieved ISO 27001 certification, and were recognized in Forbes’ AI 50.
Accelerat.ai Initiative
We secured a €34.5 million investment to launch Accelerat.ai, advancing conversational AI for underrepresented languages.
Neevo Launch & SaaS Alpha
We launched Neevo.ai, the human intelligence half of our product equation, opened our third office in Porto and releases an alpha version of our Software-as-a-Service (SaaS) platform.
Partnerships Program Launch
We launched our partnerships program, enabling global companies to monetize datasets and strengthen our marketplace as the primary revenue source.
Customer & Partner Growth
Defined.ai welcomed new customers and dozens of data partners, accelerating growth and bringing its ethical data marketplace vision to life.
$85M+
150+
150+
25+
120+
100+
Meet the Team
Daniela Braga
Founder & CEO
Daniel Navas
Chief Financial Officer
Manel Marco
SVP, Operations
Teresa Andrade
SVP, Finance
Daan Baldewijns
VP, Marketplace
Rodrigo Zaninetti
VP, Technology
Helen Giddings
VP, Delivery
Christine Payne
Sr. Director, Marketing
Melissa Carvalho
Director of Legal
Georgia Brandão
Director of People
Ahmad Rifai
Director of Presales Solutions Architecture
Ben Fagg
Head of Enterprise Sales
Join Our Team
We’re a diverse, collaborative team always looking for curious, driven people to grow with us — together.
At Defined.ai, we prioritize candidate safety and are committed to a secure, transparent hiring process. To stay informed, please review our guide on safely navigating job offers and our Privacy Notice.
In the Spotlight
Stay up to date with our latest news, events, and perspectives on building responsible AI.
Defined.ai Reports 65% Revenue Growth as Global Demand for AI Training Data Accelerates
The company achieved a 143% Net Revenue Retention in 2025, alongside a 1,200% increase in partner data on its Data Marketplace and key leadership hires, cementing its position as core data infrastructure for Generative AI.
Interview with Head Corporate Counsel: Navigating Ethical AI Practices and Compliance
An in-depth conversation on protecting data, building internal safeguards, and helping AI teams stay ahead of legal and regulatory challenges.
Defined.ai Announces Strategic Engagement with Getty Images to Deliver High-Quality, Commercially-Safe Image Datasets for AI Training
Announced at CES 2025, this collaboration expands Defined.ai’s Marketplace with access to premium, commercially safe visual datasets that respect copyright and fairly compensate creators.
Defined.ai Reports 65% Revenue Growth as Global Demand for AI Training Data Accelerates
The company achieved a 143% Net Revenue Retention in 2025, alongside a 1,200% increase in partner data on its Data Marketplace and key leadership hires, cementing its position as core data infrastructure for Generative AI.
Interview with Head Corporate Counsel: Navigating Ethical AI Practices and Compliance
An in-depth conversation on protecting data, building internal safeguards, and helping AI teams stay ahead of legal and regulatory challenges.
Defined.ai Announces Strategic Engagement with Getty Images to Deliver High-Quality, Commercially-Safe Image Datasets for AI Training
Announced at CES 2025, this collaboration expands Defined.ai’s Marketplace with access to premium, commercially safe visual datasets that respect copyright and fairly compensate creators.