Substack
CMS
WordPress
CMSSubstack vs WordPress
Substack and WordPress are both popular choices, but they serve different needs. Substack is a CMS with a traditional, manual approach to building, while WordPress is a CMS that prioritises developer or designer control.
Below you'll find a side-by-side breakdown of detection signals, AI scores, and technical fingerprints — plus our honest take on which builder wins for different use cases.
Side-by-Side Comparison
| | |
|---|---|---|
| Category | CMS | CMS |
| AI Score | 20/100 — Traditional | 20/100 — Traditional |
| Detection Signals | 5 patterns | 10 patterns |
| Script Detection | 2 patterns | 3 patterns |
| CDN Detection | 1 domains | 1 domains |
| Header Detection | — | 2 headers |
| Sites Detected | 4 scans | 6,131 scans |
| Best For | Blogs & content-heavy sitesTry Substack → | Blogs & content-heavy sitesTry WordPress → |
| Official Website | Visit | Visit |
Example Websites
Substack websites
Substack
CMS
Substack is a cms with an AI Score of 20/100 (Traditional). Our detection engine uses 5 signal patterns to identify Substack-built sites.
WordPress
CMS
WordPress is a cms with an AI Score of 20/100 (Traditional). Our detection engine uses 10 signal patterns to identify WordPress-built sites.
Platform Overviews
Substack
Substack is the largest and most influential newsletter and subscription platform, hosting hundreds of the world's top writers, journalists, and independent media outlets — including publications that have generated millions in annual subscriber revenue. It pioneered the paid newsletter model with simple 10% revenue sharing, a writer-friendly setup experience, and a built-in discovery network. Substack Recommendations has become a major growth channel, with reader suggestions driving new subscriber acquisition. Substack sites are identifiable through resources loaded from substackcdn.com for media and assets, the Substack JavaScript runtime on all publication pages, and distinctive *.substack.com subdomain patterns. Custom domain sites still load all media through substackcdn.com, making it a reliable detection signal. The platform is free to use with Substack taking 10% of paid subscription revenue.
WordPress
WordPress is the world's most popular Content Management System, powering over 43% of all websites on the internet — from personal blogs to enterprise news sites and e-commerce stores. As open-source software, WordPress is self-hosted and highly extensible through thousands of themes and plugins, including WooCommerce for e-commerce and Yoast for SEO. WordPress sites are unmistakably identifiable through their /wp-content/ and /wp-includes/ directory paths in HTML source, the WordPress generator meta tag, X-Powered-By: WordPress HTTP headers, and WordPress-specific REST API endpoints. The platform has no monthly SaaS fee — you pay for hosting — though WordPress.com offers managed hosting from $4/month. WordPress's architecture is completely different from AI builders: it's a server-rendered PHP CMS with a traditional database-driven approach.
Key Differences
- Both Substack and WordPress are classified as CMS tools, making them the most direct competitors in this comparison.
- Substack scores higher on AI involvement (20/100 vs 20/100 for WordPress), meaning it relies more heavily on AI for site generation and content creation.
- Our detection engine identifies Substack using 5 fingerprint patterns and WordPress using 10 patterns — more signals generally means more reliable detection.
- Substack serves assets from
/substackcdn\.com/iwhile WordPress uses/wp-content\/uploads/i— making CDN domain analysis one of the most reliable ways to distinguish them.
Which Should You Choose?
Choose Substack if…
- You prefer a cms solution
- You want more manual control over the final output
- Substack's detection fingerprint of 5 signals means your site is reliably identifiable
Choose WordPress if…
- You need a cms approach
- You prefer traditional building tools with predictable output
- WordPress's ecosystem and community better match your team's existing workflow
Our Pick — Based on 6,135+ detections
WordPress
Detected 1533× more often than Substack across our database of scanned sites.
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