Brilliant

What Brilliant is

Brilliant is an interactive learning platform for math and coding, with smaller tracks in science and data analysis, run by Brilliant Worldwide, Inc. It is a learner product: a student, a parent or a teacher signs up, and the learner works through short, visual lessons on screen, guided by an AI tutor named Koji. The home page calls it "Your personal tutor for math and coding" and pitches "A world-class tutor for every home", for schoolwork, test prep or learning on your own. The site says the curriculum is "crafted by award-winning teachers, subject-matter experts, and learning designers from top institutions", and that it was built by learning experts from MIT and Harvard.

The About page names three kinds of learner: students seeking to excel in STEM, homeschools seeking an engaging curriculum, and lifelong learners staying sharp. The home page reports 10 million+ learners around the world and 100,000+ 5-star app store reviews, and says Brilliant is "Fully accredited by ACS WASC", which the About page spells out as the Accrediting Commission for Schools, Western Association of Schools and Colleges.

What a learner gets

Lessons are built around doing rather than watching. The home page says every session is visual and interactive: "Instead of just memorizing, you play with concepts until they click", working through problems step by step. The About page explains the method. Each lesson focuses on a single concept, starts with the simplest version of the idea, and builds intuition through visual explanations, hands-on manipulation and concrete computation, with instant, custom feedback on each answer. Brilliant also asks before it teaches: "We don't teach how to do something before asking questions." Learners try to find a solution before they are shown the procedure, an approach the company says its testing so far supports.

Koji is the tutor layer. The site describes it as "A visual, interactive tutor, not a cheating machine": Koji works on a shared interactive canvas, asks guiding questions, sketches on the screen, gives hints and offers visual help, and it never just hands over the answer. Help is available by voice or chat whenever a learner is stuck. Koji tracks what the learner has mastered and missed, builds the learning plan around those gaps, catches up shaky fundamentals, and speeds up or slows down as needed. Regular mastery assessments check each concept, and a shortfall triggers targeted practice. The About page sets a goal that is unusual for a tutoring product: Koji's actions should gradually become things the student does alone, "until Koji is barely needed at all."

Practice is where the scaffolding comes off. Every lesson has associated practice sets designed to feel like low-stakes quizzes, with no visual aids or hints, so the learner shows independent ability. Brilliant says it predicts the optimal next problem from each learner's history, tests spaced repetition and mixed practice, and is rolling out review sets that combine earlier lessons course by course, human-reviewed, which is why the rollout is gradual.

To keep learners coming back, the site uses streaks, levels and daily goals, and the About page adds Leagues and XP. It describes these as a light gamification layer, kept deliberately small so the focus stays on the content.

What it covers

The home page presents the catalog as running "From grade 5 to college and beyond", in four areas:

• Math: Fractions, Proportional Reasoning, Coordinate Transformations, Quadratics, Functions, Trigonometric Functions and Derivatives, plus 28 additional courses.
• Computer science: Thinking in Code, Programming with Variables, Thinking in Python, Programming with Functions, Algorithmic Thinking, Computer Science Fundamentals and Introduction to Neural Networks, plus 7 additional courses.
• Science: Scientific Thinking, Circuits, Digital Circuits and Quantum Computing.
• Data analysis: Exploring Data Visually, Probability in Data, Clustering & Classification, Regression and Predicting with Probability.

A Brilliant resource page describes school math coverage from grade 4-5 foundations through grade 12 algebra and precalculus, with standards-aligned lessons, and advanced courses in calculus, vectors and matrices, probability, statistics, number theory and contest math. Learning Paths link courses in a set order with practice checkpoints; current paths include Math Foundations, Advanced Math, Programming & CS, Data Analysis, Science and Logical Reasoning. The footer also lists a K-5 Math Practice section in beta.

For a parent looking at coding for kids, the computer science track starts with Thinking in Code and Programming with Variables and moves on to Python, algorithmic thinking and an introduction to neural networks, all in the same interactive format as the math.

Parents, schools and pricing

Parents get visibility. The home page describes visual dashboards that show what clicked, what is still difficult and what to do next, and says parents and learners receive regular notifications covering completed lessons, mastery assessment results, strengths and areas that need practice. Linked family accounts, according to Brilliant's resource page, show activity, practice volume and accuracy, course progress, recently learned skills and categories of Koji use. The site also says Brilliant is "independently certified to meet strict U.S. standards for kids' online privacy and safety" as a member of the kidSAFE Seal Program.

On access, the home page invites learners to "Get started for free", and Brilliant's resource page summarizes pricing as "Free access with daily limits; Premium individual and family plans." The home page's pitch on cost is "Get a year of tutoring for the price of a few in-person sessions." A Gift Brilliant option is in the footer. For schools, Brilliant says it is "Trusted by thousands of schools" and is "Free for individual classrooms. District pricing available on request." In a classroom, every student gets a personalized program that gives custom feedback and assesses for mastery, used in class or as homework.

What learners say

The testimonials are short and specific. Eliza, a 7th grader: "I didn't get the slope unit in class, but it finally clicked after talking to Koji for a few minutes!" Tyler, a 10th grader: "I learned most of trigonometry in 12 days, I just got into a flow." Aaron, an algebra teacher: "I had 8th graders say, 'This makes me want to do more math!'" Arianne, parent of a 10-year-old, says her daughter will "get stuck on a problem and then yell, 'Never mind, Mom, I got it!'"

Who it suits

Brilliant suits students from about grade 5 up who learn best by working problems rather than watching explanations, and who want math, coding, science and data in one place. Homeschooling families get a structured math sequence with mastery checks and parent reports, and teachers can use it free in an individual classroom. Adults who want to stay sharp in STEM are an explicit audience too.

It suits less well a learner who wants a human teacher, live classes, or subjects outside STEM. The main catalog starts around grade 4 or 5, with only a K-5 Math Practice section in beta for younger children, and the free tier comes with daily limits, so regular use points toward a Premium plan.