Freemium

Anthropic's AI assistant excelling at analysis, writing, math, and coding. Thoughtful, nuanced responses for learning and research.

OpenAI's AI assistant for learning, writing, coding, and research. Ask questions, get explanations, and brainstorm ideas.

Computational knowledge engine. Get answers to math, science, engineering, and data questions with step-by-step solutions.

Learn math, science, and computer science through interactive problem-solving. Visual, hands-on approach to STEM.

Practice coding, prepare for interviews, and get hired. Skill-based assessments and coding challenges.

Platform for coding interview preparation. Over 3,000 problems with solutions, contests, and discussion forums.

Interactive coding lessons in Python, JavaScript, SQL, and more. Hands-on learning with instant feedback.

Language learning app with AI-powered features and native speaker feedback. Learn 14 languages with personalized study plans.

The world's most popular language learning app. Learn 40+ languages with fun, bite-sized lessons and gamified exercises.

Online courses and degrees from leading universities and organizations worldwide. Social learning at its best.

Access courses from Harvard, MIT, and 160+ institutions. Free online courses with optional paid certificates in every subject.

Learn from world-class universities and companies. Online courses, professional certificates, and degrees from Stanford, Google, IBM, and more.