16 technologies5 categories
substack.com is built on Substack with Cloudflare and Datadog. It ranks #780 globally among the most-visited websites.
The frontend relies on Tailwind CSS. Analytics are handled by Cloudflare Browser Insights. Infrastructure includes Cloudflare and Cloudflare DNS.
Tech Stack Highlights
Core Platform1
Substack
Blogs
75%
2 evidence signals
Header
substack: substackHeader
Substack: SubstackFrameworks & Languages5
Tailwind CSS
UI frameworks
75%
1 evidence signal
css
--tw-Node.js
Programming languages
75%
1 evidence signal
Header
Express: ExpressExpress
Web frameworks
75%
1 evidence signal
Header
^Express(?:$|,): ExpressHeadless UI
UI frameworks
75%
1 evidence signal
HTML
data-headlessui-React
JavaScript frameworks
50%
1 evidence signal
HTML
implied by Headless UIAnalytics & Marketing4
Datadogv5.35.1
RUM
100%
2 evidence signals
Script
https://www.datadoghq-browser-agent.com/us1/v5/datadog-rum.jsJS Global
DD_RUM → object(v5.35.1)G
Google Workspace
Email
100%
1 evidence signal
dns
DKIM selector: googleM
Mailgun
Email
95%
1 evidence signal
dns
SPF includes mailgun.orgCloudflare Browser Insights
Analytics
75%
1 evidence signal
Script
https://static.cloudflareinsights.com/beacon.min.jsInfrastructure & Security4
Cloudflare
CDN
100%
3 evidence signals
Header
9cb6c13afc67d3d7-SJCHeader
cloudflare: cloudflareCookie
__cf_bmC
Cloudflare DNS
PaaS
100%
1 evidence signal
dns
NS: lee.ns.cloudflare.comHSTS
Security
75%
1 evidence signal
Header
max-age=31536000; includeSubDomains; preloadCloudflare Bot Management
Security
75%
1 evidence signal
Cookie
__cf_bmLibraries & Utilities2
Z
Zendesk
Documentation
95%
1 evidence signal
dns
SPF includes zendesk.comHTTP/3
Miscellaneous
75%
1 evidence signal
Header
h3: h3=":443"; ma=86400