Analysis performed on Jul 15, 2025
This is a comprehensive technical analysis of duolingo.com performed on July 15, 2025. The analysis includes DNS configuration, server information, WHOIS data, and HTTP response details.
Quick Navigation
🤖 AI Analysis Summary
Purpose and Target: The website Duolingo.com explicitly states it is the world's most popular way to learn a language. It offers language learning through a free, fun, and science-based approach, available online or via apps.
Location: The domain is registered with Amazon Registrar, Inc., and the nameservers are AWS DNS servers (e.g., NS-1020.AWSDNS-63.NET), indicating hosting on Amazon Web Services infrastructure.
Tech: Confirmed technologies include React (a JavaScript library for building user interfaces) and Google Tag Manager. The server is identified as "duo-api."
SEO: Meta tags present include:
– Keywords: "learn, spanish, german, french, portuguese, italian, english, free, lessons, course, language, study, flashcards"
– Description: "Duolingo is the world's most popular way to learn a language. It's 100% free, fun and science-based. Practice online on duolingo.com or on the apps!"
Security: HTTPS is enabled, ensuring secure connections. However, detailed SSL certificate information is not implemented, so validity cannot be fully confirmed. No security issues are reported.
Content Status: The site contains 353 words of content, which is sufficient for analysis.
Additional Notes: The site lacks a declared language attribute in the HTML, which may affect accessibility and SEO. Accessibility features include 100% alt text for images and form input labels, but ARIA attributes and skip navigation links are missing. Heading structure is not proper. No errors or domain parking detected.
Summary: Duolingo.com is a language learning platform offering free, gamified, science-backed courses accessible online and via apps. It uses React and Google Tag Manager on an AWS-hosted server. SEO meta tags are properly set, and HTTPS is enabled.
🌐 Domain Information
The domain duolingo.com was registered on January 26, 2010, making it approximately 13 years old. It is currently in good standing with a registration status that prohibits deletion, transfer, and updates, and is set to expire on January 26, 2026. The domain is registered through Amazon Registrar, Inc., and utilizes four nameservers: NS-1020.AWSDNS-63.NET, NS-1117.AWSDNS-11.ORG, NS-1904.AWSDNS-46.CO.UK, and NS-247.AWSDNS-30.COM.
WHOIS Registration Details
| Registrar | Amazon Registrar, Inc. |
| Registration Date | 2010-01-26 |
| Expiration Date | 2026-01-26 |
| Name Servers | NS-1020.AWSDNS-63.NET NS-1117.AWSDNS-11.ORG NS-1904.AWSDNS-46.CO.UK NS-247.AWSDNS-30.COM |
⚙️ Technical Data
The DNS configuration for duolingo.com indicates the use of HTTPS for secure connections, although the SSL certificate is currently invalid and lacks proper implementation. The technology stack includes React and Google Tag Manager, with the server identified as "duo-api." Overall, while HTTPS is enabled, the security implementation requires attention due to the invalid SSL certificate.
SSL & Security
| HTTPS Status | ✅ Enabled |
| HSTS | ⚠️ Not Enabled |
| Security Summary | The website uses HTTPS for secure connections. |
Technologies
| Server Software | duo-api |
| Detected Technologies | React, Google Tag Manager |
| Technology Summary | The website uses technologies including React, Google Tag Manager. Server: duo-api. |
Content Information
| Content Size | 353 words |
| Meta Description | Duolingo is the world's most popular way to learn a language. It's 100% free, fun and science-based. Practice online on duolingo.com or on the apps! |
| Meta Keywords | learn, spanish, german, french, portuguese, italian, english, free, lessons, course, language, study, flashcards |
| Content Analysis | The site contains 353 words of content. It has proper meta tags for SEO. |
HTTP Status Information
| Redirect Chain | |
| Response Time | 0 ms |