Duolingo

en.duolingo.com

We have not found a subprocessor list published by Duolingo. We monitor 3 of its documents, which we last checked on Nov 11, 2026.

Subprocessors

None extracted.

Web TechnologiesCSV of Duolingo's web technologies · Atom feed of Duolingo's web technologies

Duolingo's homepage made 148 requests to 14 domains, 3 services controlled by another company, and 2 domains not identified.

Advertising (1): Google CloudAnalytics (1): MetaCookie compliance (1): OneTrust

3 third parties by category: Advertising 1Analytics 1Cookie compliance 1

Third parties 3 · 35 requests
Google Cloud DoubleClick Floodlight Google Analytics Google Sign-in Google Tag Manager reCAPTCHA 18% of the page's requests 26
OneTrust OneTrust 4% of the page's requests 6
Meta Facebook Pixel 2.9.419 2% of the page's requests 3
Unknown 2 · 99 requests

d35aaqx5ub95lt.cloudfront.nettupsrv.com

First party 1 · 14 requests
Duolingo Amazon CloudFront Amazon Web Services Envoy Howler.js LottieFiles Open Graph PWA React React Router 6 Sentry Webpack core-js 3.25.3 9% of the page's requests 14

3 tracked companies loaded by the homepage are not in Duolingo's subprocessor list. A website can use a service without it processing customer data.

ComplianceCSV of Duolingo's compliance · Atom feed of Duolingo's compliance

Security program

How Duolingo says it manages cybersecurity risk, in its annual report to the SEC.

Led by
Head of Security reporting to the senior management through the Governance Council
quote This Governance Council also includes our Head of Information Security, who with our dedicated Information Security Team, manages the day-to-day activities needed to prevent, detect, and mitigate cybersecurity incidents, and reports to senior management through the Governance Council.
Board oversight
Audit Committee
quote Our Board considers cybersecurity risk as part of its risk oversight function and is assisted by its Audit Committee (the "Committee"), which regularly reviews our cybersecurity program with management and
Outside review
Engages outside assessors or consultants
quote Committee members also receive presentations on cybersecurity topics and trends from our Information Security Management Leader, internal cybersecurity staff or external experts as part of the Committee's continuing education on topics that impact public companies.
Its own suppliers
Reviews their security
quote a third-party risk management process for key service providers based on our assessment of their criticality to our operations and respective risk profile.
Practices named
  • Incident response plan
  • Threat intelligence
  • Security training
Material incidents
None so far, it says
quote We have not identified risks from known cybersecurity threats, including as a result of any prior cybersecurity incidents, that have materially affected us, including our operations, business strategy, financial condition, or results of operations.
Read Item 1C in full

Cybersecurity Risk Management, Strategy and Governance Disclosures

Cybersecurity Risk Management and Strategy

We have developed and implemented a cybersecurity risk management program intended to protect the confidentiality, integrity, and availability of our critical systems and information.

We design and assess our program based on various cybersecurity frameworks and guidelines. This does not imply that we meet any particular technical standards, specifications, or requirements, only that we use these frameworks and guidelines as a guide to help us identify, assess, and manage cybersecurity risks relevant to our business.

Our cybersecurity risk management program is integrated into our overall risk management program, and shares common methodologies, reporting channels and governance processes that apply across the risk management program to other legal, compliance, strategic, operational, and financial risk areas.

Key elements of our cybersecurity risk management program include the following:

•risk assessments designed to help identify material risks from cybersecurity threats to our critical systems and information;

•a dedicated information security team principally responsible for managing (1) our cybersecurity risk assessment processes, (2) our security controls, and (3) our response to cybersecurity incidents;

•the use of external service providers, where appropriate, to assess, test or otherwise assist with aspects of our security processes and controls;

•cybersecurity awareness training of our employees, including incident response personnel, and senior management;

•a cybersecurity incident response plan that includes procedures for responding to cybersecurity incidents; and

•a third-party risk management process for key service providers based on our assessment of their criticality to our operations and respective risk profile.

We have not identified risks from known cybersecurity threats, including as a result of any prior cybersecurity incidents, that have materially affected us, including our operations, business strategy, financial condition, or results of operations. We face risks from cybersecurity threats that, if realized, are reasonably likely to materially affect us, including our operations, business strategy, financial condition, or results of operations. See Part I, Item 1A. “Risk Factors—Risks Relating to Our Business and Industry – Security breaches of our IT Systems, improper or unauthorized access to or disclosure of our Confidential Information, other hacking and social engineering or phishing attacks on our IT Systems or service, or other cyber incidents could disrupt our services or compromise Confidential Information related to our business and expose us to liability, which could harm our reputation and materially adversely affect our business.”.

Cybersecurity Governance

Our Board considers cybersecurity risk as part of its risk oversight function and is assisted by its Audit Committee (the "Committee"), which regularly reviews our cybersecurity program with management and

reports to the Board. Cybersecurity reviews by the Committee generally occur quarterly or more frequently as determined to be advisable. Committee members also receive presentations on cybersecurity topics and trends from our Information Security Management Leader, internal cybersecurity staff or external experts as part of the Committee's continuing education on topics that impact public companies.

Our management team oversees our cybersecurity risk management through our Information Security Management System Governance Council, which is chaired by our Information Security Management Leader and includes our Chief Technology Officer, Chief Engineering Officer, and General Counsel, along with employee subject matter experts in law, privacy, engineering, and cybersecurity. This Governance Council also includes our Head of Information Security, who with our dedicated Information Security Team, manages the day-to-day activities needed to prevent, detect, and mitigate cybersecurity incidents, and reports to senior management through the Governance Council. This Head of Information Security has served in various roles within the cybersecurity field for over 15 years, including security leadership roles in multiple organizations and holds an undergraduate degree in information security and forensics.

Our management team supervises efforts to prevent, detect, mitigate, and remediate cybersecurity risks and incidents through various means, which may include briefings from internal security personnel; threat intelligence and other information obtained from governmental, public or private sources, including external consultants engaged by us; and alerts and reports produced by security tools deployed in the IT environment.

Security program from Duolingo, Inc.'s Form 10-K for fiscal 2025, filed Feb 27, 2026, Item 1C, in its words (evidence)

Security recordCSV of Duolingo's security record · Atom feed of Duolingo's security record

What public security catalogs list for Duolingo, in their words.

Data breaches

  • Duolingo 2,676,696 accounts Email addresses; Names; Spoken languages; Usernames

    In August 2023, 2.6M records of data scraped from Duolingo were broadly distributed on a popular hacking forum. Obtained by enumerating a vulnerable API, the data had earlier appeared for sale in January 2023 and contained email addresses, names, the languages being learned, XP (experience points), and other data related to learning progress on Duolingo. Whilst some of the data attributes are intentionally public, the ability to map private email addresses to them presents an ongoing risk to user privacy.

    Have I Been Pwned

Breach data: Have I Been Pwned (CC BY 4.0), which calls every entry a breach, including data scraped from public pages (evidence)

Service statusCSV of Duolingo's status page incidents · Atom feed of Duolingo's status page incidents

Aug 15: no incident reportedAug 16: no incident reportedAug 17: no incident reportedAug 18: no incident reportedAug 19: no incident reportedAug 20: no incident reportedAug 21: no incident reportedAug 22: no incident reportedAug 23: no incident reportedAug 24: no incident reportedAug 25: no incident reportedAug 26: no incident reportedAug 27: no incident reportedAug 28: no incident reportedAug 29: no incident reportedAug 30: no incident reportedAug 31: no incident reportedSep 1: no incident reportedSep 2: no incident reportedSep 3: no incident reportedSep 4: no incident reportedSep 5: no incident reportedSep 6: no incident reportedSep 7: no incident reportedSep 8: no incident reportedSep 9: no incident reportedSep 10: no incident reportedSep 11: no incident reportedSep 12: no incident reportedSep 13: no incident reportedSep 14: no incident reportedSep 15: no incident reportedSep 16: no incident reportedSep 17: no incident reportedSep 18: no incident reportedSep 19: no incident reportedSep 20: no incident reportedSep 21: no incident reportedSep 22: no incident reportedSep 23: no incident reportedSep 24: no incident reportedSep 25: no incident reportedSep 26: no incident reportedSep 27: no incident reportedSep 28: no incident reportedSep 29: no incident reportedSep 30: no incident reportedOct 1: no incident reportedOct 2: no incident reportedOct 3: no incident reportedOct 4: no incident reportedOct 5: no incident reportedOct 6: no incident reportedOct 7: no incident reportedOct 8: no incident reportedOct 9: no incident reportedOct 10: no incident reportedOct 11: no incident reportedOct 12: no incident reportedOct 13: no incident reportedOct 14: no incident reportedOct 15: no incident reportedOct 16: no incident reportedOct 17: no incident reportedOct 18: no incident reportedOct 19: no incident reportedOct 20: no incident reportedOct 21: 2 incidents (1 critical, 1 no impact stated)Oct 22: no incident reportedOct 23: no incident reportedOct 24: no incident reportedOct 25: no incident reportedOct 26: no incident reportedOct 27: 1 incident (1 critical)Oct 28: no incident reportedOct 29: no incident reportedOct 30: no incident reportedOct 31: no incident reportedNov 1: no incident reportedNov 2: no incident reportedNov 3: no incident reportedNov 4: no incident reportedNov 5: no incident reportedNov 6: no incident reportedNov 7: no incident reportedNov 8: no incident reportedNov 9: no incident reportedNov 10: no incident reportedNov 11: no incident reportedNov 12: no incident reported

90 days agotoday

  • 3 incidents in 90 days
  • 2 major or critical
  • 2 h 26 min typical time to resolve
  • 6 h 56 min longest major
BeganIncidentImpactLasted
Duolingo is experiencing increased errorscritical37 min
Duolingo is experiencing increased errorscritical6 h 56 min
Duolingo is experiencing increased errorsno impact stated2 h 26 min
Duolingo is experiencing increased errorscritical27 min
Duolingo is experiencing increased errorscritical20 min
Duolingo is experiencing increased errorscritical53 min
Duolingo Android app issuesmajor32 min
Issues with Video Call and Roleplayno impact stated1 h 33 min

Incidents per month

0 3 6 Dec 2025: 2 incidents (2 critical) · typical time to resolve 1 h 21 min Jan 2026: 6 incidents (5 critical, 1 no impact stated) · typical time to resolve 33 min Feb 2026: 1 incident (1 minor) · typical time to resolve 3 h 22 min Mar 2026: 1 incident (1 no impact stated) · typical time to resolve 16 min Apr 2026: 2 incidents (2 minor) · typical time to resolve 29 min May 2026: 4 incidents (2 critical, 2 no impact stated) · typical time to resolve 45 min Jun 2026: 1 incident (1 major) · typical time to resolve 32 min Jul 2026: 3 incidents (3 critical) · typical time to resolve 27 min Aug 2026: 0 incidents Sep 2026: 0 incidents Oct 2026: 3 incidents (2 critical, 1 no impact stated) · typical time to resolve 2 h 26 min Nov 2026: 0 incidents Dec 2025Jan 2026Feb Mar Apr May Jun Jul Aug Sep Oct Nov

critical major minor no impact stated

Components affected

ComponentIncidentsBar
Duolingo3

As Duolingo's status page reports its own incidents (scheduled maintenance left out), read every few hours since (evidence)

ChangesCSV of Duolingo's changes · Atom feed of Duolingo's changes

None since tracking began.

Rating badge for Duolingo's site

Duolingo transparency rating

It updates with the rating.

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