Brilliant

Brilliant

Brilliant is an interactive learning platform that tutors students in math and coding from 5th grade through college, using visual lessons and an AI tutor named Koji.

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Last Updated Oct 21, 2026
Brilliant screenshot

About

Brilliant is an interactive learning platform that teaches math and coding through hands-on problem solving rather than passive video lectures. It addresses a common frustration with self-study: learners often get stuck, guess at answers, or move on without truly understanding a concept. Brilliant combines visual, interactive lessons with a digital tutor named Koji, who guides learners step by step instead of simply handing over answers.

The platform was built by learning experts with backgrounds at MIT and Harvard, and its curriculum spans from 5th-grade math foundations through college-level calculus, plus computer science, Python, data analysis, science, and AI topics. Learners take a diagnostic to set their starting level, then follow an adaptive learning plan that adjusts pace based on frequent mastery assessments. Brilliant is available on the web, iOS, and Android, and it is accredited by ACS WASC.

Key Features

Koji, the interactive tutor: Koji works with learners on a shared interactive canvas, spotting where they are stuck, asking guiding questions, sketching on screen, and offering hints so learners solve problems themselves.
Photo-based homework help: Learners can share a photo of their schoolwork, and Brilliant reviews it, helps them get unstuck, and works through mistakes with them.
Adaptive learning plan: Diagnostics pinpoint the learner's current level, and the plan speeds up or slows down in real time based on assessment results.
Mastery assessments and progress tracking: Frequent assessments identify gaps in understanding, and a dashboard shows what has been mastered, what needs work, and what to study next.
Comprehensive math curriculum: Coverage runs from fractions and negative numbers through algebra, probability and statistics, calculus, and recreational "mind-bending" math topics.
Coding and CS courses: Courses include Python programming, algorithmic thinking, computer science fundamentals, and introductions to neural networks and AI.
Free K-5 practice library: A separate account-free library offers arithmetic practice from kindergarten through grade 5, with instant feedback, printable worksheets, and skill guides.

Pricing & Fees

  • Pricing: Premium is listed at $20/month for an Individual plan (billed annually as one payment) and $40/month for a Family plan with six seats; both renew annually and can be canceled anytime.
  • Free tier: A free plan includes a daily lesson, while Premium unlocks unlimited access to all 40+ interactive courses, tutoring by Koji, ad-free use, and personalized practice.
  • Platform availability: Brilliant works on the web and has official apps for iOS in the App Store and Android in Google Play, with progress synced across devices.
  • Accreditation and trust: Brilliant is fully accredited by ACS WASC, COPPA certified, and used by thousands of schools.
  • Gift and group options: Gift subscriptions and group plans for families, classes, or teams are available.

Who It's For

Brilliant is designed for learners from 5th grade through college and beyond, including adults returning to math or learning to code. Parents and homeschool families can use it as a structured tutor for schoolwork and test preparation, while teachers can assign it as supplementary practice. It suits anyone who prefers learning by solving problems with immediate feedback rather than watching lectures, whether the goal is mastering fractions, preparing for calculus, or building Python and computer science skills.

FAQ

What is Brilliant?Brilliant is an interactive learning platform that teaches math, coding, data analysis, science, and AI through problem solving, guided by a digital tutor named Koji that helps learners work through problems without simply revealing answers.

How much does Brilliant cost?Premium is listed at $20/month for individuals and $40/month for a family plan with six seats, both billed annually as a single payment; a free plan with a daily lesson is also available.

What platforms does Brilliant run on?Brilliant is available on the web and through official apps for iOS and Android, and progress syncs across devices.

Is Brilliant credible for schooling?Brilliant is fully accredited by ACS WASC, COPPA certified, and used by thousands of schools; it also offers a free K-5 practice library that does not require an account.

Who is Koji?Koji is Brilliant's digital tutor, available in most courses, who asks guiding questions, sketches explanations, and talks learners through mistakes; availability and usage limits depend on the learner's plan and course.