Defined.ai vs OpenAI
Side-by-side comparison of AI visibility scores, market position, and capabilities
Defined.ai is a global AI training data marketplace offering ethically sourced datasets across audio, image, video, text, and multimodal formats; 1.6M+ global contributors across 150+ countries; 1,200% marketplace data growth in 2025;
About
Defined.ai (formerly DefinedCrowd) is a Lisbon, Portugal-based AI data marketplace and training data platform founded in 2015 by Daniela Braga. The company operates the largest global marketplace of ethically sourced AI training data, providing enterprises with ready-to-use datasets across audio, image, video, text, and multimodal formats — all delivered via API for speed and scale. Defined.ai's mission is to accelerate responsible AI development by ensuring every dataset on its platform is sourced with explicit contributor consent, fair compensation, and full regulatory compliance.
GPT-5 and o3 model family at $25B+ ARR; $840B post-money valuation (Feb 2026 round); ChatGPT 1B+ users; largest private fundraise in history ($110B). Competing with Anthropic Claude 4, Google Gemini 3, Meta Llama 4.
About
OpenAI is a San Francisco-based artificial intelligence company developing and deploying large-scale AI systems — including GPT-4o, o1 reasoning models, DALL-E 3 image generation, Sora video generation, and the Whisper speech recognition model — through the ChatGPT consumer product and OpenAI API for developers and enterprise customers. Founded in 2015 as a nonprofit by Sam Altman, Elon Musk, Greg Brockman, and others and restructured into a capped-profit company, OpenAI raised $157 billion in total funding including a $6.6 billion round in October 2024 at a $157 billion valuation and a $40 billion round from SoftBank in 2025, generating $3.7 billion in annualized revenue in 2024 with 400 million weekly ChatGPT users.
Key Details
Capabilities & Ecosystem
Also Compare
Track AI Visibility in Real Time
Monitor how your brand performs across ChatGPT, Gemini, Perplexity, Claude, and Grok daily.