Cosmo: Learn GenAI & More

Build real skills in just minutes a day. No videos. Just doing.

Cosmo is your personal AI tutor, always ready with hands-on lessons that adapt to you. Whether you're between classes, commuting, or on a break, you’ll make real progress in GenAI, business, tech, and more.

Built by CodeSignal, the AI platform trusted by over 3,000 top employers for hiring, including Google, Meta, Zoom, Netflix, TikTok, and Anthropic.
Loved by over 1 million learners who build and prove their skills with CodeSignal.

Why Cosmo

• Cosmo, your AI tutor, adapts to you and guides you on your journey so you can learn faster
• Fun, practice-based lessons that keep you engaged
• Master the most in-demand skills to grow your career
• Earn shareable certificates and skill badges
• Take full courses or get instant help on any topic

Every course is free. Learn GenAI, business, marketing, sales, finance, accounting, product management, project management, leadership, communication, emotional intelligence, Python, JavaScript, Go, Swift, Kotlin, Rust, web development, cloud, SQL, data science, analytics, machine learning, data engineering, personal finance, focus, decision making, critical thinking, public speaking, habit formation, and more.

Explore 200+ career-building skills

• GenAI: Practice prompts and apply ChatGPT at work
• Finance: Understand money, markets, and valuation
• Marketing: Learn digital ads, branding, SEO, and strategy
• Coding: Learn Python, JavaScript, and more through practice
• Data: Build skills in SQL, machine learning, and analytics
• Leadership: Grow communication and strategic thinking
• Personal Growth: Build habits, confidence, and clarity
• Startups: Learn how to launch your idea into the world

If you like Cosmo, try Cosmo+ to learn faster with unlimited energy.