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Companies / US

Duolingo

duolingo.com18 facts from HTTP + DNS + jobsLast verified 17 Sept 202683 job posts read on greenhouse

Duolingo sits behind Amazon CloudFront. Its mail goes through Google Workspace. Its job posts name Kotlin, Python and Swift.

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CDN & edge

DNS

  • Confidence 95 of 100, certainAmazon Route 53

Infrastructure

Mostly from job postings

  • Confidence 50 of 100, likelyAmazon Web Services
  • Confidence 50 of 100, likelyDocker
  • Confidence 50 of 100, likelyKubernetes

Languages

From job postings

  • Confidence 70 of 100, likelyKotlin
  • Confidence 70 of 100, likelyPython
  • Confidence 70 of 100, likelySwift

Security & consent

  • Confidence 95 of 100, certainOneTrust
  • Confidence 90 of 100, certainreCAPTCHA

Payments

  • Confidence 70 of 100, likelyStripe

Email

MX records show the mailbox; SPF shows services allowed to send

  • Confidence 95 of 100, certainGoogle Workspace
  • Confidence 80 of 100, strongAmazon SES

Support

  • Confidence 75 of 100, strongZendesk

Marketing

  • Confidence 75 of 100, strongSalesforce

Workspace accounts

Verification records: an account exists, usage unknown

  • Confidence 75 of 100, strongSlack
  • Confidence 70 of 100, likelyMicrosoft 365
  • Confidence 70 of 100, likelyOpenAI

Hints

Named in a single job post. Not a claim yet.

  • Confidence 35 of 100, a hintGo
  • Confidence 35 of 100, a hintGrafana
  • Confidence 35 of 100, a hintJava
  • Confidence 35 of 100, a hintMySQL
  • Confidence 35 of 100, a hintOpenTelemetry
  • Confidence 35 of 100, a hintPostgreSQL
  • Confidence 35 of 100, a hintPrometheus
  • Confidence 35 of 100, a hintSentry
  • Confidence 35 of 100, a hintTerraform

Select the evidence on any row to see exactly what we saw and when.

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