Brilliant

Brilliant teaches math, science, computer science, and data through interactive problem-solving rather than passive video watching. Each lesson drops you into a puzzle, simulation, or visual you manipulate directly, then builds the concept from what you just discovered. Founded in 2012 and based in the US, it now hosts 70+ courses spanning arithmetic through calculus, physics, probability, logic, neural networks, and quantum computing.

The core difference from Khan Academy (free, video-and-exercise) or Coursera (long university courses) is format. Brilliant is deliberately bite-sized and hands-on — most lessons take a few minutes, and difficulty adapts as you go. It competes more with Duolingo’s habit-forming daily model than with a traditional course, and its recent additions lean on AI to personalize paths and generate practice.

Key Features

• Interactive lessons across 70+ math, science, and CS courses
• Adaptive difficulty that adjusts to your answers
• Daily challenges to build a consistent learning streak
• Visual simulations for topics like calculus, logic, and neural networks
• Guided problem sets that explain the reasoning behind each answer
• Mobile app with offline lesson downloads

Pricing

• Free: A limited set of daily problems and course previews
• Premium (around $150/year, billed annually): Full access to every course and feature; a monthly option runs closer to $25/month

Best For

Curious adults, students, and professionals who want to genuinely understand STEM concepts through practice — not just watch a lecture. It suits people brushing up on math for a career switch, or anyone who learns better by doing than by reading.

Limitations

Brilliant builds strong intuition but rarely reaches the depth of a full university course, and it offers no accredited certificates. For learners who mainly need free reference material or exam-aligned coursework, Khan Academy or a Coursera specialization is a better fit, and the annual subscription is a real cost compared with those alternatives.