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Software · head to head

Brilliant vs Duolingo

Brilliant logo

Brilliant

Software

Learn math and science through problem-solving

From
Free
Rated
-
Full reviewWebsite
Duolingo logo

Duolingo

Software

Learn a language for free, forever

From
Free
Rated
-
Full reviewWebsite

The short version

  • Each has a real cost: Brilliant requires active daily engagement to maintain learning streaks, which can feel gamified; Duolingo free tier includes ads and energy-based hearts system limiting daily practice without paying
  • They diverge on capability: Brilliant covers Interactive lessons, Duolingo covers 40+ languages.

Where they differ

Only the attributes on which Brilliant and Duolingo actually diverge.

Attributes where Brilliant and Duolingo differ
AttributeBrilliantDuolingo
PlatformsWeb, iOS, AndroidiOS, Android, Web
Founded20122011

Identical on both: starting price (Free), pricing model (Unknown), free tier (Yes), user rating (Not yet rated), category (Unknown).

What each one covers

Drawn from each product's published feature list. An absence here means we hold no record of it - not that the product lacks it.

Only in Brilliant

  • Interactive lessons
  • Problem-solving
  • Daily challenges
  • Progress tracking
  • Guided paths
  • Offline access
  • Mobile learning
  • Mobile apps

Only in Duolingo

  • 40+ languages
  • Gamification
  • Streaks
  • Leaderboards
  • Stories
  • Podcasts
  • Speaking exercises
  • AI tutor

Both cover

  • Web support
  • IOS support
  • Android support

What people use each for

The jobs each tool is most often brought in to do.

Brilliant

  • Math learningnot Duolingo
  • Science educationnot Duolingo
  • Programming basicsnot Duolingo
  • Problem-solving skillsnot Duolingo

Duolingo

  • Language learningnot Brilliant
  • Travel preparationnot Brilliant
  • Career developmentnot Brilliant
  • Cultural explorationnot Brilliant

Where each one falls short

Documented limitations, not opinions. Every one is a constraint you would hit in normal use.

Brilliant

  • Requires active daily engagement to maintain learning streaks, which can feel gamified
  • Premium subscription needed for full course access; basic free tier is limited
  • Focuses only on STEM subjects; no humanities or social sciences
  • Interactive nature requires more time commitment than passive video learning

Duolingo

  • Free tier includes ads and energy-based hearts system limiting daily practice without paying
  • Gamification focus may appeal to casual learners but lacks depth for serious language study beyond conversational basics
  • Limited to short, bite-sized lessons without extensive grammar explanations or cultural context

Pricing, plan by plan

Brilliant

Free
  • Premium Monthly$24.99/month
    • Access to all 90+ courses
    • No ads
  • Premium Annual$150/year
    • Access to all 90+ courses
    • No ads

Duolingo

Free
  • FreeFree
    • All language courses
    • Ad-supported
    • Limited hearts (5-heart system)
  • Super$12.99/month
    • Ad-free
    • Unlimited hearts
    • Extra practice tools
  • Super Family$119.99/year
    • Up to 6 users
    • All Super features
    • Family group
  • Max$null/mo
    • All Super features
    • Video Call with Lily
    • Roleplay scenarios

Which should you pick?

Choose Brilliant if

  • You need interactive lessons.
  • You want to start without paying.
  • You work on Web, iOS, Android.
  • You also want problem-solving.
Brilliant review

Choose Duolingo if

  • You need 40+ languages.
  • You want to start without paying.
  • You work on iOS, Android, Web.
  • You also want gamification.
Duolingo review

Questions people ask

Is Brilliant or Duolingo better?
Neither clearly leads. Brilliant starts at Free and Duolingo at Free, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, Brilliant or Duolingo?
Brilliant starts at Free and Duolingo at Free.
Does Brilliant or Duolingo run on more platforms?
Brilliant runs on Web, iOS, Android. Duolingo runs on iOS, Android, Web.
Can I use Brilliant for free?
Both have a free tier, so you can try either at no cost before committing.
What is Brilliant best used for?
Brilliant is most often used for math learning, science education, programming basics, problem-solving skills. Of those, math learning and science education are not what Duolingo is typically brought in for.
What can Brilliant do that Duolingo cannot?
Brilliant covers Interactive lessons, Problem-solving, Daily challenges, Progress tracking. Duolingo covers 40+ languages, Gamification, Streaks, Leaderboards. Both handle Web support, IOS support, Android support.

Answered from the vendors’ own pages

Brilliant: Does Brilliant offer offline learning?

Yes. The Brilliant mobile app allows users to download lessons and learn without internet connection.

Source
Duolingo: What is Duolingo's pricing model?

Duolingo offers free tier with ads and limited features, Super Duolingo at $12.99/month (ad-free, unlimited hearts, extra practice), Super Family at ~$119.99/year for up to 6 users, and Duolingo Max with AI features like Video Call and Roleplay.

Source
Brilliant: Is there a free tier for Brilliant?

Yes. Brilliant offers a free basic tier with access to some courses. K-12 teachers and their students can qualify for free Premium access.

Source
Duolingo: Is Duolingo effective for language learning?

Duolingo has 135+ million monthly active users as of Q3 2025, making it the world's most widely used language-learning app. Its gamified approach and free tier have driven massive adoption.

Source
Brilliant: What subject areas does Brilliant cover?

Brilliant covers over 90 courses across mathematics, computer science, physics, chemistry, and data science, taught by experts from MIT, Harvard, Google, and Microsoft.

Source
Duolingo: What AI features does Duolingo Max include?

Duolingo Max includes Video Call for conversation practice with AI character Lily and Roleplay for scenario-based speaking practice. As of January 2026, Explain My Answer became free for all users.

Source
Brilliant: How does Brilliant's teaching approach differ from video lectures?

Brilliant emphasizes active learning through interactive problem-solving rather than passive video watching, similar to Duolingo's gamified approach.

Source
Duolingo: Does Duolingo work offline?

Duolingo is primarily online, though it may offer limited offline lesson downloads on some platforms. Full features require internet connection.

Source
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