duolingo.com — 83 Technologies · Stack Spy

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3

Advertising

9

Analytics and Tracking

4

Content Delivery Network

8

Email Hosting Providers

Advertising

3 techs

DoubleClick.Net Facebook Custom Audiences Google Remarketing

Analytics and Tracking

9 techs

Facebook Conversion Tracking Facebook Pixel Facebook Signal Google Analytics Google Analytics 4 Google Conversion Tracking Google Universal Analytics LinkedIn Insights Pardot

Content Delivery Network

4 techs

Amazon ALB CloudFront Cloudflare Content Delivery Network

Email Hosting Providers

8 techs

Amazon SES Apple iCloud Mail DMARC DMARC Reject Google Apps for Business Google Workspace SPF Salesforce SPF

Frameworks

5 techs

Application Load Balancer Facebook Domain Verification Open Graph React Twitter Cards

JavaScript Libraries and Functions

3 techs

HTML5 History API Intersection Observer Webpack

Mobile

8 techs

Apple Mobile Web App Capable Apple Mobile Web App Status Bar Style Apple Mobile Web Clips Icon IPhone / Mobile Compatible Mobile Non Scaleable Content Mobile Optimized Viewport Meta iPhone / iPad Compatible

Name Server

1 tech

Operating Systems and Servers

1 tech

SSL Certificates

3 techs

AWS Certificate Manager Amazon SSL SSL by Default

Web Hosting Providers

1 tech

Web Master Registration

1 tech

Google Webmaster

Widgets

10 techs

Amazon Elastic Load Balancing Sticky Session Apple Whitelist Google Tag Manager OneTrust Open Graph Protocol Optanon Salesforce Zendesk google-tag-manager reCAPTCHA

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