Softwr

Education · head to head

Duolingo vs Lightspeed Systems

Duolingo logo

Duolingo

Education

Learn a language for free, forever

From
Free
Rated
-
Full reviewWebsite
Lightspeed Systems logo

Lightspeed Systems

Education

Filtering, classroom management and student safety monitoring for K-12 device fleets

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; Lightspeed Systems no module has published pricing, so districts cannot benchmark a quote without running a formal procurement, and the eventual figure depends heavily on which co-operative contract they buy through.
  • They diverge on capability: Duolingo covers 40+ languages, Lightspeed Systems covers Filter.
  • Prices and features above were last checked on 31 August 2026.

Where they differ

Only the attributes on which Duolingo and Lightspeed Systems actually diverge.

Attributes where Duolingo and Lightspeed Systems differ
AttributeDuolingoLightspeed Systems
Starting priceFreeOn request
Pricing modelUnknownquote
Free tierYesNo
PlatformsiOS, Android, WebWeb, iOS, Android, Chrome OS, Windows, macOS
Founded2011Unknown

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

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 Lightspeed Systems

  • Filter
  • Alert
  • Classroom
  • Insight
  • Signal
  • MDM
  • StopIt
  • Hall Monitor

What people use each for

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

Duolingo

  • Language learningnot Lightspeed Systems
  • Travel preparationnot Lightspeed Systems
  • Career developmentnot Lightspeed Systems
  • Cultural explorationnot Lightspeed Systems

Lightspeed Systems

  • A district with 15,000 take-home Chromebooks that needs filtering to follow the device onto home and public networksnot Duolingo
  • A technology director being asked to justify the edtech budget, who can use app usage data to cancel licences nobody opensnot Duolingo
  • A school board that has agreed to safety monitoring but has no staff able to respond to alerts at night, and so buys the human review servicenot Duolingo
  • A one-to-one iPad rollout wanting device enrolment, filtering and teacher screen control from one vendornot 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

Lightspeed Systems

  • No module has published pricing, so districts cannot benchmark a quote without running a formal procurement, and the eventual figure depends heavily on which co-operative contract they buy through.
  • Alert detection and the 24/7 human review that makes it actionable are priced separately, so a district that budgets for Alert alone ends up owning the overnight triage burden itself.
  • The agent model means coverage stops at the managed device, and students moving to a personal phone on mobile data are outside filtering and monitoring entirely, which undercuts the compliance claim in the exact scenario administrators worry about.
  • Teacher screen monitoring is frequently deployed without training, and lessons stall while staff learn the interface, so the first term of a Classroom rollout often produces complaints rather than the intended benefit.
  • Buying eight modules from one vendor makes renewal a single high-value negotiation with no partial leverage, and districts locked into a multi-year co-operative contract cannot easily drop a module that underperforms.

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

Lightspeed Systems

On request
  • Lightspeed Filter$undefined/year
    • Device-level content filtering on and off network
    • YouTube and social media policy controls
    • Quoted per student device per year
  • Lightspeed Alert$undefined/year
    • Safety signal detection
    • 24/7 human review sold as an additional service
    • Quoted
  • Lightspeed Classroom, Insight, Signal, MDM, StopIt and Hall Monitor$undefined/year
    • Each sold as a separate per-student module
    • Quoted, commonly bundled

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 Lightspeed Systems if

  • You need filter.
  • You work on Web, iOS, Android, Chrome OS, Windows, macOS.
  • You also want alert.
Lightspeed Systems review

Questions people ask

Is Duolingo or Lightspeed Systems better?
Neither clearly leads. Duolingo starts at Free and Lightspeed Systems at On request, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, Duolingo or Lightspeed Systems?
Duolingo has a free tier; the other does not. Paid plans start at Free for Duolingo and On request for Lightspeed Systems.
Does Duolingo or Lightspeed Systems run on more platforms?
Duolingo runs on iOS, Android, Web. Lightspeed Systems runs on Web, iOS, Android, Chrome OS, Windows, macOS.
Can I use Duolingo for free?
Yes. Duolingo has a free tier, so you can try it without paying. Lightspeed Systems 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 Lightspeed Systems is typically brought in for.
What can Duolingo do that Lightspeed Systems cannot?
Duolingo covers 40+ languages, Gamification, Streaks, Leaderboards. Lightspeed Systems covers Filter, Alert, Classroom, Insight.

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
Lightspeed Systems: How much does Lightspeed Filter cost per student?

Lightspeed does not publish rates. Pricing is quoted per student device per year and varies with district size, module mix and which purchasing co-operative contract you buy through.

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
Lightspeed Systems: Is 24/7 human alert review included with Alert?

No. Alert provides the detection; the staffed round-the-clock review service is an additional purchase, and it is usually what districts actually need.

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
Lightspeed Systems: Does filtering work when students are at home?

Yes, the agent runs on the device rather than the network, so policy follows the Chromebook or laptop off site.

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
Lightspeed Systems: What does Insight actually do for the budget?

It reports which licensed apps are opened and by whom, which districts use to cancel subscriptions with low usage. It also flags whether an app meets named privacy and accessibility standards.

Share

Related pages

More on Duolingo

More on Lightspeed Systems

Keep looking

Other head to heads