Brilliant vs CK-12
Side-by-side comparison of features, pricing, ratings, and alternatives.
Brilliant is an online learning platform that teaches math, computer science, and science through interactive, visual problem-solving rather than passive video lectures. Courses are built around short daily lessons that adapt to a learner's pace, with an AI tutor called Koji available to ask guiding questions and identify knowledge gaps as students work through problems.
CK-12 is a non-profit organization dedicated to increasing access to educational materials through its flexible, customizable web-based platform. It provides high-quality digital textbooks, simulations, and practice exercises primarily focused on science, technology, engineering, and mathematics (STEM) subjects. The platform empowers teachers to tailor content to their specific curriculum needs while offering students personalized learning experiences through adaptive practice tools and interactive modules. By leveraging open-educational-resource (OER) principles, CK-12 makes comprehensive learning resources accessible to classrooms worldwide without subscription costs.
- Hands-on, visual approach suits learners who dislike lecture-style courses
- Broad coverage across math, coding, and science in one subscription
- Adaptive difficulty keeps lessons appropriately challenging
- Free tier lets new users try daily lessons before subscribing
- Completely free for students and educators
- Extensive library of customizable STEM content
- Interactive simulations enhance conceptual understanding
- Seamless integration with Google Classroom
- Full course library requires a paid Premium subscription
- Less suited to learners who prefer structured, credit-bearing coursework
- Depth on any single advanced topic is shallower than a dedicated university-level course
- Limited availability for non-STEM humanities subjects
- Interface can occasionally feel overwhelming due to the sheer volume of resources
- Relies heavily on a stable internet connection for interactive features
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The Verdict
AI-generated from listing dataCK-12 is the free, teacher‑focused platform with LMS integrations, while Brilliant offers a paid, self‑learner‑oriented interactive experience across math, coding, and science.
Key differences
- •Pricing model – CK-12 is completely free; Brilliant requires a paid Premium for full access.
- •Target audience – CK-12 is built for K‑12 teachers and students; Brilliant targets self‑learners and parents.
- •Integrations – CK-12 connects with Google Classroom and Canvas; Brilliant lists no public integrations.
- •Content creation – CK-12 lets educators remix FlexBooks; Brilliant provides a fixed library created by its team.
- •Support channels – CK-12 offers help center plus email; Brilliant only provides a help center.
Pricing & value
CK-12 is entirely free; Brilliant only offers limited free daily lessons and charges for full library.
Ease of use / learning curve
Both platforms are described as interactive and self‑service; no specific usability data to favor one.
Features & depth
Brilliant includes an AI tutor, adaptive pacing, and hands‑on coding lessons not mentioned for CK-12.
Integrations & ecosystem
CK-12 integrates with Google Classroom and Canvas; Brilliant lists no public integrations.
Collaboration
CK-12 lets teachers assign work, track progress, and share FlexBooks; Brilliant lacks collaboration tools.
Support
CK-12 provides help center and email support; Brilliant only offers a help center.
Scalability
CK-12 is a cloud SaaS platform suitable for whole classrooms; Brilliant is a mobile‑only app.
Choose Brilliant if…
Self‑motivated students or parents wanting interactive, visual STEM lessons and willing to pay for premium content.
Choose CK-12 if…
K‑12 teachers, homeschoolers, or students needing free, customizable STEM resources with LMS integration.
Common questions
Is there any cost to use the full content of each platform?
CK-12 is completely free; Brilliant requires a paid Premium subscription for the full course library.
Can I integrate the platform with my school’s LMS?
CK-12 integrates with Google Classroom and Canvas; Brilliant lists no public integrations.
Which platform supports teacher‑assigned practice and progress tracking?
CK-12 offers teacher assignment, progress dashboards, and customizable FlexBooks; Brilliant does not provide these collaboration features.