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Expert human data and evaluation for training frontier AI

Human-validated training data and evaluation services for frontier AI models

The environments frontier AI trains on, and the agents that do the recurring work

Get paid to train the next generation of AI models

Interactive courses for data science, AI and analytics skills

Study smarter for IELTS, TOEIC and HSK with AI speaking and writing rooms

AI English speaking coach with instant pronunciation feedback

AI data infrastructure for building production-grade models

Ace the Duolingo English Test with AI scoring and 18,000+ practice questions

AI APIs for credit underwriting and digital customer onboarding

Courses and best practices for building AI-powered products end to end

AI-driven web accessibility for ADA, EAA and WCAG compliance

Cloud-native workspace for running a team of AI agents

The relevance engine with a built-in feedback loop

Free no-code machine learning model training

AI cloud contact center and unified communications

Turn a course idea into hands-on CS lessons, coding labs, exams and autograders.

Managed AI software delivery for maintaining, modernizing and extending your codebase

AI data annotation platform and managed labeling services for AI training data

Your design system, documented, synced and served to people and AI agents

AI governance, testing, and observability for regulated enterprises

Multiple test types, one editor: Run A/B, A/A, multivariate and split-URL tests from one editor while keeping the same statistical engine ac

Ethical human-in-the-loop data labeling and AI validation

Supervision infrastructure that keeps AI coding agents safe, visible and reviewable.