11 technologies5 categories
lettersofnote.com is built on Substack with Cloudflare and Datadog.
The frontend relies on Tailwind CSS. Analytics are handled by Cloudflare Browser Insights. Infrastructure includes Cloudflare.
Tech Stack Highlights
Core Platform1
Substack
Blogs
75%
2 evidence signals
Header
substack: substackHeader
Substack: SubstackFrameworks & Languages3
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(?:$|,): ExpressAnalytics & Marketing3
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
MX: aspmx.l.google.comCloudflare Browser Insights
Analytics
75%
2 evidence signals
Script
https://static.cloudflareinsights.com/beacon.min.jsScript
https://static.cloudflareinsights.com/beacon.min.js/vcd15cbe7772f49c399c6a5babf22c1241717689176015Infrastructure & Security3
Cloudflare
CDN
100%
3 evidence signals
Header
9e388a30dfb88a19-SJCHeader
cloudflare: cloudflareCookie
__cf_bmHSTS
Security
75%
1 evidence signal
Header
max-age=31536000; includeSubDomains; preloadCloudflare Bot Management
Security
75%
1 evidence signal
Cookie
__cf_bmLibraries & Utilities1
HTTP/3
Miscellaneous
75%
1 evidence signal
Header
h3: h3=":443"; ma=86400