# Duolingo

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

Duolingo (en.duolingo.com): subprocessors, data processing agreement, security documents and changes, as monitored by Third Party Index.

- Page: https://thirdpartyindex.com/vendors/duolingo
- Documents last verified: 2026-11-11
- Transparency rating: 19/100 (how much it publishes, not how secure it is): Subprocessor list 0/30 (not found); Processing locations 0/8 (no list); Purposes 0/7 (no list); Data processing addendum 0/12 (not found); Trust center 0/8 (not found); Privacy policy 6/6; security.txt 0/6 (not found); Security page 0/5 (not found); Status page 5/5; Vulnerability disclosure 0/5 (not found); Pages still reachable 8/8
- Supply chain: relies on 0 tracked vendors directly, 0 within two hops, 0 within three; 0 tracked vendors rely on it directly, 0 within two hops, 0 within three
- Cite as: Duolingo, Third Party Index, https://thirdpartyindex.com/vendors/duolingo (data CC BY 4.0)

## Documents

| Document | URL | Last verified | Last changed |
|---|---|---|---|
| Privacy policy | https://en.duolingo.com/privacy | 2026-11-11 | 2026-10-22 |
| Terms | https://en.duolingo.com/terms | 2026-11-11 | 2026-10-22 |
| Status page | https://status.duolingo.com/ | 2026-11-11 | 2026-11-11 |

## Subprocessors (0)

No subprocessor list has been found or read for this vendor.

## Security program

What Duolingo, Inc.'s Form 10-K for fiscal 2025, filed Feb 27, 2026 (Item 1C) says, in its words (https://www.sec.gov/Archives/edgar/data/1562088/000162828026012494/0001628280-26-012494-index.htm).

- Led by: Head of Security, reporting to the senior management through the Governance Council
- Board oversight: Audit Committee
- Practices named: Incident response plan, Threat intelligence, Security training
- Engages outside assessors or consultants
- Reviews its suppliers' security
- Says no cybersecurity incident has materially affected it

## Web Technologies

Duolingo's homepage made 148 requests to 14 domains, 3 services controlled by another company, and 2 domains not identified. Loaded on 2026-10-12 by a browser that accepted nothing; other visits may load more or less. What a page loads is not a list of who receives customer data.

3 third parties by category: Advertising 1 (Google Cloud); Analytics 1 (Meta); Cookie compliance 1 (OneTrust). Each company that appears controlled by another organization is counted once, under the main category of the technologies detected from it on this homepage or, when none was, the category recorded from the company's own page (marked reviewed) or else the one it is usually detected as on other published homepages (marked as such); unclassified: none of these.

### Third parties (3)

- Google Cloud: 26 requests to google.com, gstatic.com, doubleclick.net, googletagmanager.com, recaptcha.net, google-analytics.com, googleadservices.com; DoubleClick Floodlight, Google Analytics, Google Sign-in, Google Tag Manager, reCAPTCHA
- OneTrust: 6 requests to cookielaw.org, onetrust.com; OneTrust
- Meta: 3 requests to facebook.net, facebook.com; Facebook Pixel 2.9.419

### Unknown (2)

Domains not identified yet: d35aaqx5ub95lt.cloudfront.net, tupsrv.com

### First party (1)

- Duolingo: 14 requests to duolingo.com; Amazon CloudFront, Amazon Web Services, Envoy, Howler.js, LottieFiles, Open Graph, PWA, React, React Router 6, Sentry, Webpack, core-js 3.25.3

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.

## Subprocessor of (0)

No tracked vendor lists it.

## Security record

Breaches listed by Have I Been Pwned (CC BY 4.0, haveibeenpwned.com):

- Duolingo, 2023-01-24: 2676696 accounts; data: Email addresses, Names, Spoken languages, Usernames

## Service status

Incidents it reported on its own status page.

- Last 90 days: 3 reported incidents (2 major or critical, 0 minor, 1 with no impact stated)
- Typical time to resolve: 2 h 26 min
- Status page last read: 2026-11-12
- 2026-10-27: Duolingo is experiencing increased errors (critical)
- 2026-10-21: Duolingo is experiencing increased errors (critical)
- 2026-10-21: Duolingo is experiencing increased errors (no impact stated)
- 2026-07-19: Duolingo is experiencing increased errors (critical)
- 2026-07-19: Duolingo is experiencing increased errors (critical)
- 2026-07-18: Duolingo is experiencing increased errors (critical)
- 2026-06-09: Duolingo Android app issues (major)
- 2026-05-27: Issues with Video Call and Roleplay (no impact stated)

---

Third Party Index (https://thirdpartyindex.com) monitors vendors' public security and privacy documents and keeps each version as evidence. Data CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/); vendors' own documents are theirs. API: https://thirdpartyindex.com/api