Defined.ai

About Defined.ai

Defined.ai operates as a global marketplace for ethically sourced artificial intelligence (AI) training data. The company provides a platform for buying and selling AI data, models, and tools, supplemented by professional services for complex machine learning projects. Founded in 2015 by Dr. Daniela Braga, Defined.ai (formerly DefinedCrowd) was established to address the need for high-quality, bias-free data for AI systems. Dr. Braga's background combines over two decades of experience in linguistics, speech technology, and AI, including nearly seven years at Microsoft, where she was involved in creating the virtual assistant Cortana. This experience informed the company's focus on delivering quality-guaranteed training data across more than 50 languages by combining machine learning with a global community of human contributors. The company is headquartered in Seattle, Washington, with an office in Lisbon, Portugal. The firm's business model centers on its AI data marketplace, where clients can purchase ready-to-use datasets or request custom data collection and annotation services. It offers datasets for a range of applications, including automatic speech recognition (ASR), natural language processing (NLP), computer vision, and large language models (LLMs). The company serves clients across various industries, such as technology, healthcare, finance, and automotive. A key part of its strategy includes subscription-based Data Access Plans (DAP), which offer scalable and discounted access to its speech datasets. In January 2025, the company announced a collaboration with Getty Images to provide commercially-safe image datasets for AI training. Defined.ai emphasizes an ethical approach to data, ensuring all datasets are sourced with consent and in compliance with privacy regulations like GDPR. The company holds several ISO certifications for data security and privacy. This focus on compliance is positioned as a strategic advantage, especially with the introduction of regulations like the EU AI Act. The company reported 65% revenue growth in 2025, driven by global demand for compliant AI datasets.