Site Report · blogging

Last updated: May 12, 2026

Substack Site Report

Our crawlers examined Substack and identified a minimal technology footprint powering this Blogging website. Hosted on Cloudflare with Cloudflare, the site is built on a custom-built platform and delivers moderate load times (approximately 733 ms server response). The sections below present the full technical profile of Substack.

substack.com

Full size ↗

Technology Stack

Technologies detected on Substack

This site uses Cloudflare as the web server and Cloudflare for content delivery.

Web Server

Cloudflare

CDN

Cloudflare

SSL Certificate

Security status for Substack

The SSL certificate is valid and issued by Google Trust Services. It expires on June 24, 2026 (42 days remaining). The connection uses TLSv1.3.

Status

Valid

Issuer

Google Trust Services

Expires

Jun 24, 2026

42 days remaining

Protocol

TLSv1.3

DNS Information

Domain name system records for Substack

Nameservers

ali.ns.cloudflare.com

lee.ns.cloudflare.com

A Records

172.64.150.56 104.18.37.200

MX Records

mxa.mailgun.org

mxb.mailgun.org

SPF Record

Present

DMARC Record

Present

Speed & Performance

Page load performance for Substack

The site has an acceptable load time, though there is room for improvement. Our analysis measured a server response time of 733 ms, a total page size of approximately 75 KB, and 162 external resources loaded on the page.

Rating

medium

Response Time

733 ms

Page Size

75 KB

Resources

162 requests

SEO Meta Tags

Meta tag analysis for Substack

The page title ("Substack - A new economic engine for culture") is well-optimized at 44 characters, the meta description is a healthy 122 characters, Open Graph tags are fully configured for social sharing, and a canonical URL is properly set.

Title Tag

44 chars

Substack - A new economic engine for culture

Meta Description

122 chars

Substack is a media platform for video, writing, podcasts, and creator-centered communities, all powered by subscriptions.

Open Graph Tags

og:title Substack - A new economic engine for culture

og:description Substack is a media platform for video, writing, podcasts, and creator-centered communities, all powered by subscriptions.

og:image https://substackcdn.com/image/fetch/$s_!uTRu!,w_400,c_limit,f_auto,q_auto:good,fl_progressive:steep/https%3A%2F%2Fsubstack.com%2Fimg%2Fhome_page%2Fog-homepage.png

Canonical URL

https://substack.com/

Mobile Friendliness

Mobile compatibility for Substack

Overall

Mobile Friendly

Viewport Meta

Present

Responsive Design

Detected

Quick Overview

HTTP Status 200

Response Time 733 ms

SSL Valid

Speed medium

Mobile good

Jump to

Monitor Substack with GoScreenAPI

Track uptime, capture screenshots, and monitor visual changes for substack.com — all from a single API. Get started with 250 free screenshots per month.

Start Monitoring Free → View Pricing

More about Substack

Explore all pages for substack.com

Substack Site Report

Technology Stack

SSL Certificate

DNS Information

Speed & Performance

SEO Meta Tags

Mobile Friendliness

Quick Overview

Monitor Substack with GoScreenAPI

More about Substack

Related Sites

Medium