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Education · head to head

Duolingo vs Glassbox

Duolingo logo

Duolingo

Education

Learn a language for free, forever

From
Free
Rated
-
Full reviewWebsite
Glassbox logo

Glassbox

Business Intelligence

Digital experience intelligence

From
On request
Rated
-
Full reviewWebsite

The short version

  • Only Duolingo has a free tier, so it costs nothing to try first.
  • Each has a real cost: Duolingo free tier includes ads and energy-based hearts system limiting daily practice without paying; Glassbox no fixed pricing tiers published; custom quotes required based on package, data retention, and session volume
  • They diverge on capability: Duolingo covers 40+ languages, Glassbox covers Session Replay.
  • Prices and features above were last checked on 30 August 2026.

Where they differ

Only the attributes on which Duolingo and Glassbox actually diverge.

Attributes where Duolingo and Glassbox differ
AttributeDuolingoGlassbox
Starting priceFreeOn request
Pricing modelUnknownsubscription
Free tierYesNo
PlatformsiOS, Android, WebWeb, Mobile, Hybrid
CategoryEducationBusiness Intelligence
Founded20112010

Identical on both: user rating (Not yet rated).

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 Duolingo

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

Only in Glassbox

  • Session Replay
  • Struggle Detection
  • Journey Mapping
  • AI Insights
  • Voice of Customer
  • Adobe Analytics
  • Google Analytics
  • Salesforce

Both cover

  • Web support

What people use each for

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

Duolingo

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

Glassbox

  • User experience analysisnot Duolingo
  • Bug reproductionnot Duolingo
  • Conversion optimizationnot Duolingo
  • Customer journey mappingnot Duolingo
  • Usability testingnot Duolingo

Where each one falls short

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

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

Glassbox

  • No fixed pricing tiers published; custom quotes required based on package, data retention, and session volume

Pricing, plan by plan

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$119.99/year
    • Up to 6 users
    • All Super features
    • Family group
  • Max$undefined/mo
    • All Super features
    • Video Call with Lily
    • Roleplay scenarios

Glassbox

On request
  • CustomFree
    • Full Platform
    • Mobile Analytics
    • Enterprise Support

Which should you pick?

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

Choose Glassbox if

  • You need session replay.
  • You work on Web, Mobile, Hybrid.
  • You also want struggle detection.
Glassbox review

Questions people ask

Is Duolingo or Glassbox better?
Neither clearly leads. Duolingo starts at Free and Glassbox at On request, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, Duolingo or Glassbox?
Duolingo has a free tier; the other does not. Paid plans start at Free for Duolingo and On request for Glassbox.
Does Duolingo or Glassbox run on more platforms?
Duolingo runs on iOS, Android, Web. Glassbox runs on Web, Mobile, Hybrid.
Can I use Duolingo for free?
Yes. Duolingo has a free tier, so you can try it without paying. Glassbox starts at On request.
What is Duolingo best used for?
Duolingo is most often used for language learning, travel preparation, career development, cultural exploration. Of those, language learning and travel preparation are not what Glassbox is typically brought in for.
What can Duolingo do that Glassbox cannot?
Duolingo covers 40+ languages, Gamification, Streaks, Leaderboards. Glassbox covers Session Replay, Struggle Detection, Journey Mapping, AI Insights. Both handle Web support.

Answered from the vendors’ own pages

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
Glassbox: How much does Glassbox cost?

Glassbox uses custom pricing based on three factors: the selected package (Production Operation, Marketing/Business, or Product), data retention period, and session volume. The vendor encourages contacting sales to build customized packages.

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
Glassbox: Does Glassbox offer add-ons for specific industries?

Yes, Glassbox offers specialized add-on solutions including fraud prevention, accessibility features, and call center solutions tailored for financial organizations.

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
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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