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Brilliant brilliant.org

Can AI replace Brilliant?

A consolation build is possible, but the paid product's decisive value sits outside a solo rebuild. For Brilliant, build interactive practice around user-authored math and science lessons. The hard boundary is expert curriculum, interactive problem library, pedagogy, apps, and content rights, plus content, pedagogy, and network.

Verdict: Nah · Keep paying, or use a free alternativeBuild time: closest consolation build: one sitting
Nah

01What it costs

$30/moPremium Individual, monthly per user
$360per year at that price

Checked Aug 12, 2026 · source: brilliant.org.

PlanMonthlyBilled yearlyWhat you get
FreeFreeFreeFirst 2 levels of every course; up to 2 lessons/day; sequential progress; occasional ads
Premium Individual$30$20/moUnlimited lessons and all levels across 40+ courses; no ads; jump ahead; Koji tutoring
Premium Family—$40/moUp to 6 seats; each member gets a separate Premium account; all 40+ courses
Premium Group—$11.33/mo3–50 seats; starts at 3 seats for $33.99/month equivalent; each extra seat $10.10/month

Hidden costs: Group plan has a 3-seat minimum; extra seats cost $10.10/month each and a full group cannot add seats mid-term, capacity can be increased at renewal.

02Could AI build it for you?

The core job: Turn user-authored math and science lessons into a study plan with interactive practice, schedule retrieval practice, and show progress without claiming accredited instruction.

What a working version needs:

  • modern browser
  • user-supplied study material
  • optional speech or language-model API key

Editorial comparison targets the Premium plan and a personal study companion DIY substitute. Recheck price before merge.

03What you'd give up

  • expert curriculum, interactive problem library, pedagogy, apps, and content rights
  • licensed course catalog
  • expert curriculum
  • human feedback
  • large learner network and certification

People still pay for Brilliant because the learning loop is buildable, while trusted curriculum, instructors, feedback, credentials, and community are not. The recurring cost buys curriculum quality, assessment validity, content rights, spaced-repetition tuning, speech models, sync, moderation, and support, not just the visible interface.

04Free and cheaper alternatives

eXeLearningopen-source

A desktop lesson authoring tool for interactive exercises, games, equations and quizzes, with decidedly public-sector aesthetics.

Versus paying: It is an authoring and export tool, not Brilliant's polished ready-made adaptive STEM curriculum, guided learning path or motivation system.

exelearning.net →
Oppiaopen-source

Authors branching interactive explorations that respond to wrong answers instead of merely displaying the solution.

Versus paying: Creating responsive branches is manual, and the result does not match Brilliant's broad authored catalog or production-quality interactive visuals.

oppia.org →
Lumifree

A free desktop H5P editor for interactive lessons, simulations and quizzes; content quality remains your problem.

Versus paying: It edits standalone H5P activities but supplies no sequenced curriculum, adaptive guided path or ready-made STEM library.

lumi.education →
GeoGebrafree

Excellent interactive mathematics authoring and practice, but it stops being Brilliant once the science is not mathematical.

Versus paying: It is excellent for interactive mathematics but becomes a much weaker substitute once the science is not mathematical, and it lacks Brilliant's guided curriculum.

geogebra.org →
Moodleopen-source

Hosts authored activities, quizzes and progress, although the actual interactive pedagogy still has to come from you.

Versus paying: It is an LMS shell rather than Brilliant's interactive pedagogy, so the author must build the lessons, feedback and activities from scratch.

moodle.org →

Compare the free alternatives to Brilliant side by side →

Sponsor slot · openFeatured alternative to Brilliant. A labeled card for one relevant tool.
Book this spot →

05The build prompt

Read the verdict first: this one is hard to get right.

Get the Build Kit for Brilliant

The complete build prompt, plus 11 step-by-step prompts from research to launch, a design system file, a page-by-page spec, the data model and a launch checklist.

Get the Build Kit · $9 →

One-time payment. Delivered on screen and by email.

06Free open-source starting points

  • Moodle: Long-running open-source learning platform with courses, assessments, and progress tracking.

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Prices change; confirm on the vendor's site before you decide.