URL Inspection: https://status.duolingo.com

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Technologies

Technologies Detected

Infrastructure & Network (6)

CDN	AWS CloudFront Amazon CloudFront is a fast content delivery network (CDN) service that securely delivers data, videos, applications, and APIs to customers globally with low latency and high transfer speeds.
Description: Amazon CloudFront is a fast content delivery network (CDN) service that securely delivers data, videos, applications, and APIs to customers globally with low latency and high transfer speeds. It integrates with AWS services and provides DDoS protection and SSL/TLS encryption. View full details
Evidence: • Resource Hint (Preload): https://dka575ofm4ao0.cloudfront.net/assets/vendor/bowser-1643ca34a6d589b2d4d42163a891e4512d5d7657125e09bb5f3d44288114e6bd.js • Resource Hint (Preload): https://dka575ofm4ao0.cloudfront.net/assets/register_subscription_form-589b657fec607087fc5c740c568270907310bc4f6aaa20256e70f01b103025ca.js • Resource Hint (Preload): https://dka575ofm4ao0.cloudfront.net/assets/status_common-a86dffb81955091741c3de8bded6ce66ae0c6d8f736b57b580f853d9f892727e.js • Resource Hint (Preload): https://dka575ofm4ao0.cloudfront.net/packs/0.3196e1790c0547398277.css • Resource Hint (Preload): https://dka575ofm4ao0.cloudfront.net/assets/status/status_manifest-51905443bbfe61223eaea38cbf08b789e674d8721a1447b6649eecf417e904a7.css ... and 21 more

CDN	Cloudflare CDNJS Cloudflare CDNJS is a free, open-source CDN that hosts popular JavaScript libraries and frameworks.
Description: Cloudflare CDNJS is a free, open-source CDN that hosts popular JavaScript libraries and frameworks. It provides fast, reliable delivery of JavaScript libraries like jQuery, React, Vue, and thousands of others, helping developers improve website performance without hosting libraries themselves. View full details
Evidence: • HTML <script>: https://cdnjs.cloudflare.com/polyfill/v3/polyfill.js

DNS Provider	AWS Route53 Amazon Route 53 is a highly available and scalable cloud DNS web service from Amazon Web Services.
Description: Amazon Route 53 is a highly available and scalable cloud DNS web service from Amazon Web Services. It provides reliable domain name resolution, health checking, traffic routing, and integration with other AWS services like EC2, S3, and CloudFront. View full details
Evidence: • DNS Record NS: ns-1020.awsdns-63.net (root domain: duolingo.com) • DNS Record NS: ns-1117.awsdns-11.org (root domain: duolingo.com) • DNS Record NS: ns-1904.awsdns-46.co.uk (root domain: duolingo.com) • DNS Record NS: ns-247.awsdns-30.com (root domain: duolingo.com)

Email Provider	Google Workspace Google Workspace (formerly G Suite) provides business email hosting using Gmail's infrastructure.
Description: Google Workspace (formerly G Suite) provides business email hosting using Gmail's infrastructure. It offers custom domain email addresses, large storage capacity, advanced spam filtering, and integration with Google's productivity suite. View full details
Evidence: • DNS Record MX: aspmx.l.google.com (root domain: duolingo.com) • DNS Record MX: alt1.aspmx.l.google.com (root domain: duolingo.com) • DNS Record MX: alt2.aspmx.l.google.com (root domain: duolingo.com) • DNS Record MX: aspmx2.googlemail.com (root domain: duolingo.com) • DNS Record MX: aspmx3.googlemail.com (root domain: duolingo.com) ... and 3 more

Infrastructure	Spacelift Spacelift is an infrastructure as code (IaC) management platform that helps DevOps teams manage Terraform, Pulumi, and CloudFormation deployments.
Description: Spacelift is an infrastructure as code (IaC) management platform that helps DevOps teams manage Terraform, Pulumi, and CloudFormation deployments. It provides policy as code, automated workflows, and collaboration tools to help teams deploy and manage infrastructure safely and efficiently. View full details
Evidence: • DNS Record TXT: spacelift-domain-verification=519xtPXm (root domain: duolingo.com)

Registrar	Amazon Registrar Amazon Registrar is Amazon's domain registration service, integrated with AWS Route 53.
Description: Amazon Registrar is Amazon's domain registration service, integrated with AWS Route 53. It provides domain registration and management services for AWS customers, with seamless integration into Amazon's cloud infrastructure. View full details
Evidence: • WHOIS Registrar: Amazon Registrar, Inc.

Analytics & Marketing (3)

Analytics	Google Console Google Search Console (formerly Google Webmaster Tools) is a free service from Google that helps website owners monitor and maintain their site's presence in Google search results.
Description: Google Search Console (formerly Google Webmaster Tools) is a free service from Google that helps website owners monitor and maintain their site's presence in Google search results. It provides insights into search performance, indexing status, and technical SEO issues. View full details
Evidence: • DNS Record TXT: google-site-verification=975UaH3lkKONB88HjWDDg34p8cdCqyTVSq_KGBAXrmU (root domain: duolingo.com)

Marketing	Klaviyo Klaviyo is an email and SMS marketing platform designed for e-commerce businesses.
Description: Klaviyo is an email and SMS marketing platform designed for e-commerce businesses. It provides advanced segmentation, automation workflows, and personalization tools to help businesses send targeted marketing messages and drive revenue through email and SMS campaigns. View full details
Evidence: • DNS Record TXT: klaviyo-site-verification=RKdcF3 (root domain: duolingo.com) • DNS Record TXT: klaviyo-site-verification=TGmZS7 (root domain: duolingo.com)

Marketing	Salesforce Pardot Salesforce Pardot is a B2B marketing automation platform that helps businesses generate leads, nurture prospects, and measure marketing ROI.
Description: Salesforce Pardot is a B2B marketing automation platform that helps businesses generate leads, nurture prospects, and measure marketing ROI. It provides email marketing, lead scoring, marketing automation, and CRM integration for B2B marketing teams. View full details
Evidence: • DNS Record TXT: v=spf1 ip4:100.25.59.11 ip4:205.201.128.0/20 ip4:198.2.128.0/18 ip4:148.105.8.0/21 ip4:52.73.203.75 ip4:52.70.130.33 include:amazonses.com include:_spf.google.com include:_spf.salesforce.com include:mail.zendesk.com include:aspmx.pardot.com ~all (root domain: duolingo.com) • DNS Record TXT: pardot_208162_=610bfb45f202232a79db94c298b30d14332a62a6894e695b025fa7949d7b03fa (root domain: duolingo.com) • DNS Record TXT: pardot_208162_=c15d5cb1b9f31e26058e1f30bda9e5d65c57cfeea37b34af8e1dd88474460e90 (root domain: duolingo.com)

Social & Communication (2)

Communication	Salesforce Cloud Salesforce Service Cloud is a customer service platform that helps businesses provide support to customers across multiple channels.
Description: Salesforce Service Cloud is a customer service platform that helps businesses provide support to customers across multiple channels. It provides case management, knowledge base, live chat, and service analytics to help organizations deliver excellent customer service and support. View full details
Evidence: • DNS Record TXT: v=spf1 ip4:100.25.59.11 ip4:205.201.128.0/20 ip4:198.2.128.0/18 ip4:148.105.8.0/21 ip4:52.73.203.75 ip4:52.70.130.33 include:amazonses.com include:_spf.google.com include:_spf.salesforce.com include:mail.zendesk.com include:aspmx.pardot.com ~all (root domain: duolingo.com)

Communication	Slack Slack is a business communication platform that provides channels for team communication, direct messaging, file sharing, and integrations with other tools.
Description: Slack is a business communication platform that provides channels for team communication, direct messaging, file sharing, and integrations with other tools. It's widely used by teams and organizations for internal communication, collaboration, and workflow automation. View full details
Evidence: • DNS Record TXT: slack-domain-verification=iuNWYimCCkEpnistAJvWc4YOZF8izoZ23TCDek0I (root domain: duolingo.com)

AI & Services (2)

AI	Anthropic Anthropic is an AI safety company that develops AI systems including Claude, a large language model designed to be helpful, harmless, and honest.
Description: Anthropic is an AI safety company that develops AI systems including Claude, a large language model designed to be helpful, harmless, and honest. It provides AI research, development, and API access to advanced AI models for businesses and developers. View full details
Evidence: • DNS Record TXT: anthropic-domain-verification-z4335b=YssTBALPY7K784Sri4FjVHjd3 (root domain: duolingo.com)

AI	OpenAI OpenAI is an AI research company that develops advanced artificial intelligence systems including GPT (Generative Pre-trained Transformer) models and DALL-E.
Description: OpenAI is an AI research company that develops advanced artificial intelligence systems including GPT (Generative Pre-trained Transformer) models and DALL-E. It provides API access to powerful AI models for text generation, image generation, and other AI capabilities for developers and businesses. View full details
Evidence: • DNS Record TXT: openai-domain-verification=dv-A4cFxdrYIEodfG6UiQU0qxnT (root domain: duolingo.com) • DNS Record TXT: openai-domain-verification=dv-ieCpefZUqvVQwb8f7o4SlFye (root domain: duolingo.com)

Security & Privacy (3)

Security	DMARC Digests DMARC Digests is a DMARC monitoring and reporting service that helps organizations track and analyze DMARC reports.
Description: DMARC Digests is a DMARC monitoring and reporting service that helps organizations track and analyze DMARC reports. It provides daily digest emails summarizing DMARC authentication results, helping organizations monitor email authentication and identify potential issues. View full details
Evidence: • DMARC RUA: mailto:re+xu5r3a1wrlo@inbound.dmarcdigests.com

Security	Google reCAPTCHA Google reCAPTCHA is a free service that protects websites from spam and abuse by distinguishing human users from bots.
Description: Google reCAPTCHA is a free service that protects websites from spam and abuse by distinguishing human users from bots. It uses advanced risk analysis and adaptive challenges to verify that interactions are legitimate, helping prevent automated attacks and abuse. View full details
Evidence: • HTML <script>: https://www.recaptcha.net/recaptcha/enterprise.js?onload=onloadCallback&render=explicit • HTML <script>: https://www.recaptcha.net/recaptcha/enterprise.js?onload=onloadCallback&render=explicit

Security	HackerOne HackerOne is a vulnerability coordination and bug bounty platform that connects organizations with security researchers.
Description: HackerOne is a vulnerability coordination and bug bounty platform that connects organizations with security researchers. It provides bug bounty programs, vulnerability disclosure, and penetration testing services to help organizations find and fix security vulnerabilities. View full details
Evidence: • DNS Record TXT: h1-domain-verification=sjPBeaGqQwEe8YhJ3W8JVNJa7WDQFAzc6AHkURoErkh324Yy (root domain: duolingo.com)

SSL & Certificates (1)

Certificate Authority	Let's Encrypt Let's Encrypt is a free, automated, and open certificate authority run by the Internet Security Research Group (ISRG).
Description: Let's Encrypt is a free, automated, and open certificate authority run by the Internet Security Research Group (ISRG). It provides free SSL/TLS certificates to enable encrypted HTTPS on websites, making web security accessible to everyone. It's one of the most widely used certificate authorities globally. View full details
Evidence: • SSL Certificate Issuer: C=US, O=Let's Encrypt, CN=R12

Other (12)

Business	Zendesk Zendesk is a customer service and support platform that provides ticketing systems, help desk software, and customer communication tools.
Description: Zendesk is a customer service and support platform that provides ticketing systems, help desk software, and customer communication tools. It helps businesses manage customer support requests, provide multichannel support, and improve customer satisfaction through organized support workflows. View full details
Evidence: • DNS Record TXT: v=spf1 ip4:100.25.59.11 ip4:205.201.128.0/20 ip4:198.2.128.0/18 ip4:148.105.8.0/21 ip4:52.73.203.75 ip4:52.70.130.33 include:amazonses.com include:_spf.google.com include:_spf.salesforce.com include:mail.zendesk.com include:aspmx.pardot.com ~all (root domain: duolingo.com)

Cloud	AWS AWS (Amazon Web Services) is Amazon's cloud computing platform that provides a wide range of cloud services including computing, storage, databases, networking, analytics, machine learning, and more.
Description: AWS (Amazon Web Services) is Amazon's cloud computing platform that provides a wide range of cloud services including computing, storage, databases, networking, analytics, machine learning, and more. It's one of the leading cloud infrastructure providers globally. View full details
Evidence: • IP 108.138.85.101 → ASN 16509 (Amazon)

Cloud	Alibaba Cloud Alibaba Cloud is a cloud computing platform that provides compute, storage, networking, databases, and AI services.
Description: Alibaba Cloud is a cloud computing platform that provides compute, storage, networking, databases, and AI services. It offers elastic compute, object storage, and enterprise solutions across global regions, with a strong presence in Asia-Pacific and China. View full details
Evidence: • DNS Record TXT: aliyun-site-verification=1acfc148-50be-45c8-a021-3c933fc8eff9 (root domain: duolingo.com)

Cloud	Microsoft Microsoft is a multinational technology company that develops and licenses software, cloud services, and hardware products.
Description: Microsoft is a multinational technology company that develops and licenses software, cloud services, and hardware products. It provides operating systems, productivity applications, cloud computing, and enterprise technology solutions. View full details
Evidence: • DNS Record TXT: MS=ms66530579 (root domain: duolingo.com)

Development	Atlassian Atlassian is a software company that provides collaboration and development tools for teams.
Description: Atlassian is a software company that provides collaboration and development tools for teams. Its products include Jira for project management, Confluence for documentation, Bitbucket for code collaboration, and Trello for task management, widely used by software development teams. View full details
Evidence: • Header Server: AtlassianEdge • CNAME: Reverse DNS: status-duolingo-com-df9d4307-fcc9-42fa-9bd1-57512afbe80f.saas.atlassian.com • DNS Record TXT: atlassian-sending-domain-verification=423a5faf-1cfa-4704-a38a-f7adae302dd6 (root domain: duolingo.com)

Development	Docker Docker is a containerization platform that enables developers to package applications and their dependencies into containers.
Description: Docker is a containerization platform that enables developers to package applications and their dependencies into containers. It provides tools for building, shipping, and running applications in isolated environments, simplifying deployment and ensuring consistency across different systems. View full details
Evidence: • DNS Record TXT: docker-verification=b4ead4c5-fd66-42a5-a684-8f2e7f4c1417 (root domain: duolingo.com)

Development	JetBrains JetBrains is a software development company that creates integrated development environments (IDEs) and developer tools.
Description: JetBrains is a software development company that creates integrated development environments (IDEs) and developer tools. It provides IDEs like IntelliJ IDEA, PyCharm, WebStorm, and other tools that enhance developer productivity with intelligent code assistance and debugging features. View full details
Evidence: • DNS Record TXT: jetbrains-domain-verification=bt8q7duih10l9pmf5fo5yy8wf (root domain: duolingo.com)

Email	Amazon SES Amazon SES (Simple Email Service) is a cloud-based email sending service from AWS that enables businesses to send transactional and marketing emails.
Description: Amazon SES (Simple Email Service) is a cloud-based email sending service from AWS that enables businesses to send transactional and marketing emails. It provides scalable email delivery, bounce and complaint handling, and email reputation management for applications and businesses. View full details
Evidence: • DNS Record TXT: v=spf1 ip4:100.25.59.11 ip4:205.201.128.0/20 ip4:198.2.128.0/18 ip4:148.105.8.0/21 ip4:52.73.203.75 ip4:52.70.130.33 include:amazonses.com include:_spf.google.com include:_spf.salesforce.com include:mail.zendesk.com include:aspmx.pardot.com ~all (root domain: duolingo.com) • DNS Record TXT: amazonses:+SIz2NZPqYri3C+PSIyKShZIbuI4rNpbLlES7lmvpu4= (root domain: duolingo.com)

Email	Postmark Postmark is a transactional email service that focuses on deliverability and reliability.
Description: Postmark is a transactional email service that focuses on deliverability and reliability. It provides fast, reliable email delivery for transactional emails like receipts, notifications, and password resets, with detailed analytics and bounce handling to ensure emails reach the inbox. View full details
Evidence: • DMARC RUA: mailto:re+lhqmqj57zra@DMARC.postmarkapp.com

HR	Rippling Rippling is a workforce management platform that combines HR, IT, and finance in a single system.
Description: Rippling is a workforce management platform that combines HR, IT, and finance in a single system. It provides employee onboarding, payroll, benefits administration, device management, and app provisioning to help businesses manage their entire workforce from one platform. View full details
Evidence: • DNS Record TXT: rippling-domain-verification=9692f0635321f04d (root domain: duolingo.com)

Status Page	Atlassian Statuspage Atlassian Statuspage is a status communication platform that helps organizations communicate service status and incidents to users.
Description: Atlassian Statuspage is a status communication platform that helps organizations communicate service status and incidents to users. It provides status pages, incident management, and communication tools to help teams keep users informed about service availability and maintenance. View full details
Evidence: • CNAME: Reverse DNS: npp8bpkjp8hr.stspg-customer.com

Technology	Apple Apple is a technology company that designs and manufactures consumer electronics, software, and online services.
Description: Apple is a technology company that designs and manufactures consumer electronics, software, and online services. It provides cloud services through iCloud, Apple ID authentication, and various technology products and services for consumers and businesses. View full details
Evidence: • DNS Record TXT: apple-domain-verification=bMPI889zOgALUenN (root domain: duolingo.com)