Instead of Brilliant
Brilliant alternatives
Koji, its digital tutor, guides learners through reasoning step by step in most courses. Free accounts can access all courses but take up to two lessons per day in sequence, see occasional ads, and get only a limited Koji preview. Individual Premium costs $20 a year, billed as one payment, and adds unlimited lessons and practice, lesson choice, no ads, and full Koji access.
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Mathspace
Free plan iPhoneWebStudents and teachers using adaptive mathematics instruction — Mathspace focuses on adaptive mathematics learning for students and teachers, with guided lessons, gamified practice, and parent reporting.
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Freckle Math
Free plan AndroidiPhoneWebTeachers assigning differentiated math practice — Freckle offers standards-aligned math practice from kindergarten through Algebra 2, with teacher assignments and adaptive pathways.
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Monster Math
Free plan AndroidiPhoneWebElementary learners practicing math offline — Monster Math is aimed at elementary learners and combines adaptive, guided, gamified practice with offline access.
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Interactive Primer
Free plan WebLearners wanting free, interactive STEM concept pages — Interactive Primer is a free, open-source collection of web pages for math, computer science, and physics, with guided course paths and randomized quizzes.
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BrainTrail
Free plan Web - 20
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AdaptiveMath
Free plan Web - 22
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A different service may suit you better if you need math-specific practice, classroom assignments, adaptive pathways, or offline access. Brilliant works on web, Android, and iOS but requires an internet connection, and lessons cannot be downloaded. When comparing alternatives, weigh course breadth against grade level and subject focus, and consider whether guided lessons, reporting for parents or teachers, or offline use matter more than Koji and Brilliant’s broader STEM coverage. Some alternatives are free, while others offer free plans alongside paid access.